[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fxLN3MUwXCdr5RPjwZYIDpOj8CHyjOmngWTgoKXPtZbg":3,"$f5g3gTO4_r2b6JfaP_pOXfvlUfKpHgw9mZwrcDj8kvSs":36,"$f3Ft0rKFJHppdzE-vuveecxx1BUcg9iOlMLtyzf_MJDg":256,"$fucxFBm2ZjZfGSdmdRaSNGBI_F0jJme4f0GTvzUhQfL8":318},[4,8,12,16,20,24,28,32],{"title":5,"slug":6,"path":7},"About Microbeonline.com","about-microbeonline-com","\u002Fabout-microbeonline-com\u002F",{"title":9,"slug":10,"path":11},"About Me","about-me","\u002Fabout-microbeonline-com\u002Fabout-me\u002F",{"title":13,"slug":14,"path":15},"Advertise with Us","advertise-us","\u002Fadvertise-us\u002F",{"title":17,"slug":18,"path":19},"Privacy Policy","privacy-policy","\u002Fprivacy-policy\u002F",{"title":21,"slug":22,"path":23},"Abbreviations","abbreviations","\u002Fabbreviations\u002F",{"title":25,"slug":26,"path":27},"Microbes","microbes","\u002Fmicrobes\u002F",{"title":29,"slug":30,"path":31},"Books","recommended-books","\u002Frecommended-books\u002F",{"title":33,"slug":34,"path":35},"Utilization Tests for Bacterial Identification","utilization-tests","\u002Futilization-tests\u002F",{"type":37,"data":38},"blog",{"slug":39,"title":40,"description":41,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":44,"lastUpdatedDate":45,"draft":46,"category":47,"image":42,"body":48,"faq":49,"commentsClosed":46,"tags":68,"related":70,"comments":252},"bunsen-burner-parts-principle-and-applications","Bunsen Burner: Flame Types, Aseptic Use, and Why Never in a Safety Cabinet","Which Bunsen flame to use, how it actually keeps your work aseptic (and how little it sterilizes), and why a naked flame must never go inside a biosafety cabinet.",null,"Samikshya Acharya","2022-09-18","2026-08-02",false,"lab-equipment","A student sets up a blood culture subculture on the open bench. The yellow flame is up, loop passing through it, plates opened right beside the barrel. The work looks careful. Two days later the plate grows a contaminant that was never in the sample.\n\nThe mistake is a common one, and it is not carelessness. It is a misunderstanding of what the Bunsen burner actually does. **The flame is not a sterilizing shield.** It does not clean the air around your plate. What it does is far narrower, and knowing exactly what it does (and the one place it must never go) is the difference between clean work and a ruined culture.\n\nBunsen burner is a gas burner that produces smokeless, nonluminous flame used for heating, sterilizing, and combustion purposes in laboratory experiments. It is named after Robert Bunsen, the German chemist who popularized the design in 1857 (the burner was actually refined by his laboratory assistant, Peter Desaga).\n\n**Bunsen burner ignites by the fusion of fuel and air (oxygen). There are two primary fuel sources for bunsen burner: natural gas (methane) and liquified petroleum gas (propane, butane, or a mixture of both).**\n\n## Parts of a Bunsen Burner\n\nThe Bunsen burner is an essential part of [laboratory equipment](\u002Fequipment-essential-for-microbiology-laboratory\u002F) used for heating materials in the laboratory. It consists of seven major components: **the base**, **barrel (chimney)**,**air regulator (collar)**, **air holes**, **gas valve**, **gas nozzle**, and **gas intake tube**.\n\n![Parts of Bunsen Burner - Parts of Bunsen BurnerImage source: DOI:10.13140\u002FRG.2.2.18145.66401](\u002Fblogs\u002FScreenshot-2022-09-18-at-11-03-05-PDF-FIREBOY-Bunsen-Burner.png)Figure: Parts of Bunsen Burner Image source: DOI:10.13140\u002FRG.2.2.18145.66401\n\n**Base:** It is a wide and weighty part, present in the bottom of the Bunsen burner, available in variable shapes. It helps to provide support to the burner. It also helps to provide direct contact of the burner with the work surface.\n\n**Barrel (chimney):** A metal tube, roughly 5 inches long, that rests on the base. Gas and air mix as they travel up the barrel, and the mixture ignites at the open top. The air holes that feed this mixing sit at the bottom of the barrel and are described separately below.\n\n**The air regulator (collar)**: It is a short metallic cylindrical structure around the air holes at the bottom end of the barrel. The primary function of the collar is to control the amount of air entering the barrel. \\\n\\\nIt works on a screw mechanism: rotating the collar one way opens the air holes and increases air intake, and rotating it the other way closes them. The direction that opens the collar varies by model, so check your own burner rather than assuming.\\\n**Air holes:** Two air holes are present near the bottom end of the barrel. It allows air to enter the burner to make a mixture of air or any other liquid fluid and gas.\n\n**Gas valve:**  It is connected internally with the gas nozzle, the gas receiving part. The gas supply to the burner can be controlled by rotating the gas valve right or left.\n\n**Gas nozzle (jet):** A fine metal jet at the base of the barrel, inside the burner. Gas leaves the nozzle at high velocity as a thin stream, and it is this fast stream that drags air in through the air holes (the venturi effect described below). The nozzle is what meters how much gas actually enters the barrel.\n\n**Gas intake tube:** The rubber tube on the outside of the burner that carries gas from the bench gas tap to the burner's inlet. This is the part you connect and disconnect; it is not the same as the nozzle.\n\n## Principle\n\nBunsen burner is generally fitted with spiky fittings at the base of the barrel that helps to connect the rubber tube, which is responsible for feeding gas to the burner. The gas passing through the rubber tube goes up the barrel from the bottom of the burner.\n\nThe principle of the bunsen burner is based on its ability to mix gases with oxygen by venturi effect before the mixture is ignited. The venturi effect states that the pressure decreases due to an increase in the velocity of the fluid that flows through the constricted pipe or hole. Likewise, in the case of a bunsen burner, gas flowing through the chimney has low pressure than the steady air surrounding it.\n\nThis variation in pressure causes air to be drawn into the air hole as the gas flowing passes through it with the help of the venturi effect. As a result, the flame burning at the top of the barrel occurs on the mixing of gas and oxygen.\n\n![Working principle of Bunsen Burner - Working principle of Bunsen BurnerImage source: Russell Thomas](\u002Fblogs\u002FA-schematic-of-a-Bunsen-burner.png)Figure: Working principle of Bunsen Burner Image source: Russell Thomas\n\nThus, the amount of air supplied, which can be regulated by the collar (adjustable valve), is directly proportional to the strength and color of the flame. With a closed valve, a minimal amount of air (oxygen) passes, and a smoky yellow (low temperature) flame is produced. Whereas, with opened valve, a sufficient amount of air enters, and the roaring flame is produced hot, nearly colorless.\n\n## Types of Flame on a Bunsen Burner\n\nGenerally, the flame produced by the burner can be controlled by two factors; fuel to air ratio and amount of energy.\n\n**Fuel-to-air ratio:** It determines the intensity and type of flame produced. The amount of air is controlled by an air valve.\n\n**Amount of fuel:** The amount of fuel is controlled by a gas valve.\n\nBased on the above two factors, the burner produces different flames. These include; **safety flame**, **medium flame,** and **roaring flame.**\n\n### Safety flame\n\n- It is one of the coolest flames that are orange or yellow.\n- It can be easily seen in a well-lit room and helps to remind the burner is on.\n- Reaches temperature of approximately 300℃; not used for heating any materials in the laboratory.\n- It is produced when the air valve is closed, but the air needed for combustion comes from the area near the top of the burner.\n\n### Medium blue flame\n\n- They are also known as standard, blue, or invisible.\n- Difficult to see in a bright room.\n- It is mainly used to heat materials in laboratories.\n- Reaches roughly 700 to 1000°C depending on air supply, hot enough for routine heating.\n- It is produced when the air gap is partially opened.\n\n### Roaring flame\n\n- It is the only type that makes noise.\n- It reaches roughly 1500°C, the hottest the burner produces\n- It is the hottest flame, characterized by the light blue triangle in the middle.\n- It is produced when the air gap is fully opened. Gas and air ignite at the top of the barrel on increasing airflow, resulting in a noisy, bluish-colored three-cone flame.\n\n**In summary,**\n\n| Air hole | Types of flame | Inference |\n| --- | --- | --- |\n| Air hole closed | yellow safety flame | when we are not using it. |\n| Air hole half-open | blue flame | to gently heat things up. |\n| Air holes open | roaring flame | to heat things fast. |\n\n## Types of Bunsen Burner\n\nThere are different types of Bunsen burners to choose from, depending on the gas source and experimental conditions, which include; the Tirrill burner, Teclu burner, and **Méker burner**.\n\n### Tirrill burner\n\n- It has a needle valve at the base that adjusts the gas supply, in addition to the collar that adjusts air, so both fuel and air are controlled at the bottom.\n- With both fully open it produces a hot blue flame in the same range as a well-adjusted standard burner (up to roughly 1500°C).\n\n### Teclu burner\n\n- It consists of a screw nut at the bottom of the chimney that helps to regulate the gas input.\n- The barrel tube is longer than other types of bunsen burner. As a result, gas and oxygen mix well.\n- The combustion power of the flame is stronger.\n\n### Méker burner\n\n1. The barrel is wider than other burners, so more gas and air mix before ignition.\n2. A grid across the flared top splits the flame into many small cones, giving a larger, hotter, and quieter flame than a standard Bunsen burner (its hot zone reaches roughly 1100 to 1200°C over a broad area, and the primary flame is hotter and more even than a single Bunsen cone). This is why the Méker is chosen when a hot, steady, wide flame is needed.\n3. The gas supply is controlled by a gas valve below the barrel.\n\n## Application\u002FUses of Bunsen Burner\n\n### In the chemical laboratories\n\n- Drying salts\n- Analysis of moisture content.\n- Dehydration of complexes\n- Determination of solvent flash point.\n- Determination of compound’s flammability.\n\n### Within microbiology laboratories\n\n### What the flame actually does for aseptic work\n\nIt is worth being precise here, because this is where students are most often misled. A Bunsen burner does three real things for asepsis, and one thing it does **not** do.\n\nIt does: (1) sterilize a metal inoculating loop or wire by heating it red-hot, killing everything on it in seconds; (2) flame the mouths of tubes and flasks, burning off organisms at the rim before and after you open them; (3) create a small rising column of hot air directly above the flame that discourages airborne particles from settling in that narrow zone.\n\nIt does **not** sterilize the surrounding air, the open bench, or an uncovered plate sitting beside it. The \"aseptic zone\" of a bench Bunsen is only a few centimeters wide, directly over the barrel. Work performed a hand-span away is not protected. This is the single most common misconception about the burner, and it is why open-flame technique demands that you work close to the flame, fast, and with plates open for the shortest time possible.\n\n- The burner helps in achieving a contamination-free area for research laboratory purposes.\n- It also helps with sterilizing [inoculating loop](\u002Finoculating-loop-types-and-uses\u002F) and spreader used in microbiological experiments.\n- The Bunsen burner is used in the fixation of the smear while staining.\n- It is also used in sterilizing neck tubes and flask to maintain the aseptic condition.\n\n> **Never use a Bunsen burner inside a biosafety cabinet.**\n>\n> A naked flame disrupts the cabinet's laminar airflow, the very thing that protects you and your sample. It also builds up heat that can damage the HEPA filter or the adhesives holding the cabinet together, and it introduces a fire and explosion risk with the flammable materials often present. If you need to sterilize a loop while working in a cabinet, use disposable sterile loops or a shielded micro-incinerator, never an open flame. Using a Bunsen burner for biohazard work in a cabinet is not a shortcut; it defeats the protection the cabinet exists to provide.\n\n### In zoology and botany laboratories\n\n- Preparation of permanent slides.\n- Heating purpose\n\n## Advantages of Bunsen Burner\n\n- Easy to set up and operate.\n- Cost-effective\n- It can be used not only for heating purposes but can also be used for simple glass-blowing work.\n- Available in different sizes and types for the operator’s convenience and requirements.\n\n## Limitations of Bunsen Burner\n\n1. Using Bunsen burners inside a [biological safety cabinet (BSC)](\u002Fbiological-safety-cabinet-bsc-types-working-mechanism\u002F) is not recommended because it disrupts airflow, compromising the protection of the workers and the product. Bunsen burner causes excessive heat build-up within the cabinet and may damage the HEPA filter, or melt the adhesive holding, thus compromising the cabinet’s integrity. It also presents a potential fire or explosion within the cabinet. Disposable sterile loops or **micro-incinerators** are suitable alternatives for using bunsen burners in safety cabinets.\n2. Temperature control at the required amount is impossible.\n3. Risk of fire accidents.\n\n## How to Remember\n\n**The flame is a tool, not a shield.** If you take one idea from this article, make it this: the burner sterilizes what touches the flame (the loop, the tube rim), not the air around it. A shield protects a whole area; this flame protects only what passes through it.\n\n**Air hole open = hot and honest, air hole closed = cool and cowardly.** The roaring blue flame is open, loud, and does the work. The yellow safety flame hides (it is nearly invisible in a bright room only because it is doing nothing useful) and marks a burner left idling. Open it up when you mean business, close it down when you are between tasks.\n\n**\"Never a naked flame in a cabinet.\"** The rhyme is worth keeping because the mistake is dangerous. A cabinet's protection is moving air; a flame wrecks moving air.\n\n## Key exam facts in one table\n\n| Question a student actually gets asked | The answer, with the reasoning that makes it stick |\n| --- | --- |\n| What is the working principle? | The venturi effect. A fast gas stream from the nozzle lowers pressure at the air holes, dragging in air that pre-mixes with gas before ignition at the barrel top. Pre-mixing is why the flame is hot and smokeless, unlike a candle. |\n| Which flame for heating, and why? | The blue (air hole open) flame. The yellow flame is cool (\\~300°C) and deposits soot; the blue flame is clean and hot. Yellow means \"idling,\" blue means \"working.\" |\n| Hottest part of the flame? | The tip of the inner light-blue cone in a roaring flame, \\~1500°C. Hold a loop just above the inner cone, not in the yellow outer region. |\n| What does the flame contribute to asepsis? | It sterilizes the loop and tube rims and makes a tiny (few cm) updraft zone. It does **not** sterilize the surrounding air or an open plate. Work close and fast. |\n| Why never in a biosafety cabinet? | It disrupts the laminar airflow that provides protection, can damage the HEPA filter, and is a fire risk. Use a disposable loop or micro-incinerator instead. |\n| Name three types of burner. | Tirrill (adjustable gas + air at base), Teclu (longer barrel, better mixing), Méker (wide grid top, hottest and quietest). |\n| Two fuel sources? | Natural gas (methane) or LPG (propane\u002Fbutane) |\n\n## Where Students Get Confused\n\n**\"The flame keeps my whole work area sterile.\"** No. The protected zone is only a few centimeters directly above the barrel. Anything a hand-span away is unprotected. This single misconception causes more preventable contamination than any equipment fault.\n\n**\"Yellow flame is fine, I can see it better.\"** The yellow flame is cool and sooty. It will not sterilize a loop properly and it deposits carbon on glassware. Its only legitimate use is as a visible \"burner is on\" indicator between tasks. Heat and sterilize with the blue flame.\n\n**\"A flame in the safety cabinet is extra protection.\"** It is the opposite. The flame destroys the laminar airflow that is the cabinet's entire protective mechanism, and risks the HEPA filter and a fire. Extra flame is not extra safety.\n\n**Nozzle vs intake tube.** The nozzle is the internal jet that meters gas and drives the venturi effect. The intake tube is the external rubber tube you connect to the gas tap. Exam questions sometimes test whether you know the nozzle (not the tube) is what creates the air-drawing effect.\n\n**\"Loop should glow, then straight onto the plate.\"** A red-hot loop will kill the organisms you are trying to subculture on contact. Flame it, then let it cool for a few seconds (touch it to a sterile part of the agar) before picking a colony.\n\n**References**\n\n1. Jensen WB. The origin of the Bunsen burner. Journal of Chemical Education. 2005;82(4):518. \u003Chttps:\u002F\u002Fdoi.org\u002F10.1021\u002Fed082p518>\n2. Bykowski T, Verma A, Brissette CA, Stevenson B. Aseptic technique. In: Current Protocols Essential Laboratory Techniques. 2012. \u003Chttps:\u002F\u002Fwww.researchgate.net\u002Fpublication\u002F280947477_Aseptic_techniques>\n3. Grainger Know How. Bunsen burners, Meker burners, and Tirrill burners: what's the difference? \u003Chttps:\u002F\u002Fwww.grainger.com\u002Fknow-how\u002Fequipment-information\u002Fkh-bunsen-burners-meker-burners-tirrill-burners>\n4. Bailey & Scott's Diagnostic Microbiology. 15th ed. St. Louis: Elsevier; 2022.\n5. U.S. Department of Health and Human Services. Biosafety in Microbiological and Biomedical Laboratories (BMBL). 6th ed. 2020.",[50,53,56,59,62,65],{"question":51,"answer":52},"Does a Bunsen burner sterilize the air around my work?","No. It sterilizes only what passes through the flame, such as a loop or a tube rim, and creates a small updraft zone a few centimeters above the barrel. The surrounding air and an open plate beside the flame are not sterilized. Work close to the flame and keep plates open as briefly as possible.",{"question":54,"answer":55},"Why should I never use a Bunsen burner inside a biosafety cabinet?","The flame disrupts the cabinet's laminar airflow, which is the mechanism that protects you and your sample. It can also overheat and damage the HEPA filter or the cabinet's adhesives, and it is a fire and explosion risk. Use disposable sterile loops or a micro-incinerator instead.",{"question":57,"answer":58},"Which Bunsen flame should I use to heat something?","The blue flame, produced with the air hole open. The yellow (safety) flame is cool, around 300°C, and deposits soot. The blue flame is clean and hot; the hottest point is just above the tip of the inner blue cone.",{"question":60,"answer":61},"What is the difference between the safety flame and the roaring flame?","The safety flame is yellow, cool (~300°C), and produced with the air hole closed; it is used to mark that the burner is on. The roaring flame is blue, noisy, and the hottest (~1500°C), produced with the air hole fully open; it is used for rapid, high-temperature heating.",{"question":63,"answer":64},"What is the difference between a Tirrill, Teclu, and Méker burner?","The Tirrill burner adjusts both gas and air at the base. The Teclu burner has a longer barrel for better gas-air mixing and a stronger flame. The Méker burner has a wide, grid-covered top that produces multiple small flames, giving the hottest and quietest heat with a broad, even heating area.",{"question":66,"answer":67},"What is the working principle of a Bunsen burner?","It works on the venturi effect. Gas leaving the nozzle at high velocity lowers the pressure at the air holes, drawing in air that mixes with the gas inside the barrel before igniting at the top. This pre-mixing is what produces a hot, smokeless flame.",[69],"laboratory-heating-equipment",[71,80,107,139,162,194,220],{"slug":72,"title":73,"description":74,"seoTitle":42,"seoDescription":42,"author":75,"createdDate":76,"lastUpdatedDate":77,"draft":46,"category":47,"image":42,"faq":78,"tags":79},"equipment-essential-for-microbiology-laboratory","Microbiology Laboratory Equipment: List, Uses, and How They Work","A practical guide to essential microbiology laboratory equipment, what each instrument does, how it works, and when it is used, covering sterilizers, incubators, microscopes, centrifuges, and glassware.","Ashma Shrestha","2022-05-25","2026-07-28",[],[],{"slug":81,"title":82,"description":83,"seoTitle":42,"seoDescription":42,"author":84,"createdDate":85,"lastUpdatedDate":86,"draft":46,"category":47,"image":42,"faq":87,"tags":106},"inoculating-loop-types-and-uses","Inoculating Loop: Types, Parts, Uses, and Sterilisation in Microbiology","\u003Cp>The inoculating loop is the primary instrument for transferring and streaking bacteria in microbiology. Learn its types (nichrome, platinum, disposable, calibrated), how to sterilize and cool it correctly, clinical uses including semi-quantitative urine culture, and common errors.\u003C\u002Fp>","Sushmita Baniya","2022-10-18","2026-08-14",[88,91,94,97,100,103],{"question":89,"answer":90},"What is the difference between an inoculating loop and an inoculating needle?","\u003Cp>An inoculating loop has a circular wire end and is used for surface transfers: streak plates, smear preparation, and broth inoculation. An inoculating needle has a straight wire end and is used for depth inoculation: stabbing semi-solid media such as SIM, TSI butt, gelatin, and motility media. The rule is: loop for surface, needle for depth.\u003C\u002Fp>",{"question":92,"answer":93},"Why must the inoculating loop be cooled before touching the specimen or agar?","\u003Cp>After flaming to red heat (above 800°C), the loop is hot enough to kill bacteria on contact and melt agar on touch. Cooling for 15–30 seconds allows the wire to reach a safe temperature. You can test the loop by briefly touching the agar edge away from any growth, if the agar crackles or the loop hisses, wait longer before proceeding.\u003C\u002Fp>",{"question":95,"answer":96},"Why are disposable plastic loops preferred for handling infectious specimens?","\u003Cp>Flaming a metal loop that carries infectious material generates aerosols, fine droplets containing viable organisms that become airborne. Disposable plastic loops are pre-sterilized and discarded after a single use, eliminating both the aerosol risk from flaming and the need for a Bunsen burner. They are the preferred choice in BSL-2 and BSL-3 work and in anaerobic chambers where open flames are prohibited.\u003C\u002Fp>",{"question":98,"answer":99},"What is a calibrated loop and what is it used for?","\u003Cp>A calibrated loop delivers a precise, defined volume of liquid  (either 1 µL or 10 µL) rather than an approximate loopful. In clinical microbiology, calibrated loops are used for semi-quantitative urine culture: the loop delivers a known volume of urine onto a CLED plate, colonies are counted after 24 hours of incubation, and the count is multiplied by the dilution factor to estimate CFU\u002FmL. Significant bacteriuria is defined as ≥10⁵ CFU\u002FmL. For full details on the urine culture procedure, see the Laboratory Diagnosis of UTI article.\u003C\u002Fp>",{"question":101,"answer":102},"What is the most common error when using an inoculating loop for a streak plate?","The most common error is re-entering a previous streak area without first re-sterilising the loop. This carries organisms back into an area already diluted, destroying the dilution gradient that produces isolated colonies. Each new quadrant must be entered only from the last few streaks of the previous area, and the loop must be flamed and cooled between quadrants.",{"question":104,"answer":105},"Why is nichrome wire preferred over platinum for routine laboratory loops?","\u003Cp>Nichrome wire (a nickel-chromium alloy) heats and cools rapidly, is resistant to corrosion, and costs significantly less than platinum, typically 10 to 20 times cheaper. It is durable enough for repeated flaming in routine bacteriology. Platinum wire is reserved for specialized applications where its superior acid resistance or longer working life under extreme conditions justifies the higher cost.\u003C\u002Fp>",[],{"slug":108,"title":109,"description":110,"seoTitle":42,"seoDescription":42,"author":111,"createdDate":112,"lastUpdatedDate":113,"draft":46,"category":114,"image":42,"faq":115,"tags":137},"biological-safety-cabinet-bsc-types-working-mechanism","Biological Safety Cabinet Classes I, II, and III: Which Class for Which Organism","How Class I, II, and III biosafety cabinets differ in airflow and what each actually protects, which class is required at each biosafety level, the four Class II types explained, and why a laminar airflow cabinet must never be used for infectious work.","Nisha Rijal","2019-12-05","2026-07-23","bacteriology",[116,119,122,125,128,131,134],{"question":117,"answer":118},"When do I need a biosafety cabinet, and when is open-bench work okay?","BSL1 work does not require a cabinet; open-bench work with proper handwashing and PPE is acceptable. BSL2 work requires a Class II cabinet for aerosol-generating procedures; routine non-aerosol work can be done on the open bench. BSL3 and BSL4 work require a cabinet (Class II or III depending on the organism). The biosafety level of your laboratory and the risk group of the organism determine what you need.",{"question":120,"answer":121},"What is the difference between Class I, Class II, and Class III cabinets?","Class I protects the worker and environment but not the product (room air flows over the work). Class II protects the worker, environment, and product (inward airflow, downward laminar flow, HEPA exhaust) and is the standard for BSL2\u002F3 work. Class III provides maximum containment with a totally enclosed cabinet and is used for RG4 agents at BSL4. The more you need to protect, the higher the class.",{"question":123,"answer":124},"Can I use a Class I cabinet for BSL2 work?","No. Using Class I for BSL2 (RG2 organisms) is a regulatory violation and a containment failure. Class II is required for BSL2 because RG2 organisms need product protection that Class I does not provide. Cost or equipment availability does not override this requirement.",{"question":126,"answer":127},"What is the difference between Type A2, Type B1, and Type B2 cabinets?","Type A2 recirculates 70% of air within the cabinet and exhausts 30% to the room; it is the workhorse for most BSL2\u002F3 work. Type B1 recirculates 30% and exhausts 70% to a hard duct; it is used when volatile chemicals or greater containment is needed. Type B2 exhausts 100% to a hard duct; it provides maximum containment but uses more energy. For most BSL2\u002F3 work, Type A2 is sufficient and is the standard choice.",{"question":129,"answer":130},"How often does a biosafety cabinet need to be certified?","Most regulations require annual recertification (some require every 6 months for heavily used cabinets). Certification verifies that the cabinet's airflow, HEPA filter integrity, and containment function are still adequate. Using a cabinet that hasn't been recently certified is a containment failure. Know the certification date before you work.",{"question":132,"answer":133},"What is the difference between a biosafety cabinet and a laminar airflow cabinet?","A BSC protects the worker from biohazards with inward airflow drawing aerosols away from the worker. A laminar airflow cabinet protects the product from contamination with outward airflow that pushes air toward the worker. Never use a laminar airflow cabinet for pathogenic work. For the full comparison, see Laminar Airflow Cabinet: Types and Working Principle.",{"question":135,"answer":136},"Is a Class II cabinet enough for all BSL3 work?","Class II is acceptable for most BSL3 organisms, but some highly hazardous RG3 agents may require Class III depending on institutional policy and the specific organism. Check your lab's SOPs and your biosafety officer's recommendations for agents on the borderline between Class II and Class III.",[138],"biosafety-levels",{"slug":140,"title":141,"description":142,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":143,"lastUpdatedDate":144,"draft":46,"category":47,"image":42,"faq":145,"tags":161},"hot-plate-parts-types-and-applications","Hot Plate: Parts, Types, Uses, and Hot Plate vs. Bunsen Burner and Stirrer","How a laboratory hot plate works, its parts and types, when to use a hot plate versus a Bunsen burner, magnetic stirrer, or water bath, and the mistakes that scorch media and crack glassware.","2023-03-27","2026-07-30",[146,149,152,155,158],{"question":147,"answer":148},"\u003Cp>What is a hot plate used for in a microbiology laboratory?\u003C\u002Fp>","\u003Cp>A hot plate is used mainly to prepare and melt culture media and to warm reagents. With a built-in magnetic stirrer, it also dissolves solutes evenly into buffers and solutions while heating them.\u003C\u002Fp>",{"question":150,"answer":151},"\u003Cp>What is the difference between a hot plate and a hot plate stirrer?\u003C\u002Fp>","\u003Cp>A plain hot plate only heats the sample. A hot plate stirrer adds an electromagnet beneath the surface that spins a magnetic stir bar in the solution, so the sample is heated and mixed at the same time. For media and buffer preparation, the stirrer version is usually preferred.\u003C\u002Fp>",{"question":153,"answer":154},"\u003Cp>When should I use a water bath instead of a hot plate?\u003C\u002Fp>","\u003Cp>Use a water bath when a sample needs gentle, even heating at a precise temperature, such as holding serum or reagents at 37°C or 56°C. A hot plate gives high, direct, dry heat that can scorch or overshoot, so it is the wrong tool for heat-sensitive work.\u003C\u002Fp>",{"question":156,"answer":157},"\u003Cp>Why should flammable solvents not be heated on a hot plate?\u003C\u002Fp>","\u003Cp>A hot plate surface can reach about 350°C, which is well above the flash point of common solvents like ether, acetone, and hexane. Heating these on an open hot plate can ignite them, so they are heated by other means such as a water bath in a fume hood.\u003C\u002Fp>",{"question":159,"answer":160},"\u003Cp>Why does my agar scorch on the hot plate?\u003C\u002Fp>","\u003Cp>Scorching happens when the heat is set too high and the media is not stirred. Because a hot plate heats from the bottom by direct contact, the layer touching the plate burns before the rest melts. Use moderate heat with stirring, or melt agar in a water bath or by autoclaving.\u003C\u002Fp>",[69],{"slug":163,"title":164,"description":165,"seoTitle":42,"seoDescription":42,"author":75,"createdDate":166,"lastUpdatedDate":167,"draft":46,"category":47,"image":42,"faq":168,"tags":193},"bacterial-or-micro-incinerator-parts-operation-and-uses","Bacterial Incinerator: How It Works and When to Use It Instead of a Bunsen Burner","How a microincinerator sterilizes a loop without an open flame, how long to hold and cool it, and why it is the required choice inside a biosafety cabinet.","2022-10-02","2026-07-29",[169,172,175,178,181,184,187,190],{"question":170,"answer":171},"What temperature does a bacterial incinerator reach?","Around 850°C, with models ranging from roughly 800°C to 900°C. This is well above the temperature needed to reduce organic material on an inoculating loop to ash within seconds.",{"question":173,"answer":174},"How long should I hold the loop in the incinerator?","About 5 to 10 seconds, until the wire glows red, assuming the chamber has been warmed up for around 10 minutes. Then withdraw it and let it cool for 15 to 30 seconds before touching a specimen or medium, because a hot loop will kill the organisms you are trying to transfer.",{"question":176,"answer":177},"Does a microincinerator work in the absence of oxygen?","No. This is a common misconception. The chamber is open at one end and sits in room air, and organic material on the loop is burned in air exactly as it would be in a flame. Heating material in the absence of oxygen is a different process called pyrolysis.",{"question":179,"answer":180},"Why use an incinerator instead of a Bunsen burner?","The main reason is aerosol containment. Flaming a wet, loaded loop causes spatter that throws viable organisms into the air. In a microincinerator the same spatter happens inside an enclosed chamber, where droplets strike hot walls and are destroyed rather than dispersing across the bench. It is also the correct choice wherever an open flame is unsafe or impossible.",{"question":182,"answer":183},"Can I use a Bunsen burner inside a biosafety cabinet instead?","No. An open flame disrupts the cabinet's laminar airflow, which is the mechanism that protects both you and the sample. It can also damage the HEPA filter and creates a fire risk. Inside a cabinet, use a microincinerator or disposable sterile loops.",{"question":185,"answer":186},"Is a microincinerator the same as a waste incinerator?","No, despite the shared name. A microincinerator is a small benchtop device for sterilizing loops, needles, and tube mouths. A waste incinerator is a large facility that burns clinical and municipal waste for disposal. They share a principle but differ completely in scale, purpose, and regulation.",{"question":188,"answer":189},"Can I heat-fix smears in a bacterial incinerator?","You can, but with care. The chamber runs at around 850°C while a smear only needs to reach roughly 60 to 80°C, warm to the back of the hand. Over-heating distorts cell morphology and can make Gram staining unreliable, so present the slide only briefly. A dedicated slide warmer or methanol fixation gives better morphology where it matters.",{"question":191,"answer":192},"What are the disadvantages of a bacterial incinerator?","It requires mains electricity, which makes it unusable during power interruptions, and needs about 10 minutes to warm up. It costs more than a Bunsen burner, its exterior stays hot after switch-off, and heavy continuous use can drop the chamber temperature enough to reduce reliability. In laboratories with unreliable power, the Bunsen burner remains the practical choice for routine work.",[69],{"slug":195,"title":196,"description":197,"seoTitle":198,"seoDescription":42,"author":43,"createdDate":199,"lastUpdatedDate":144,"draft":46,"category":47,"image":42,"faq":200,"tags":219},"water-bath-parts-principle-and-applications","Water Bath: Parts, Principle, Types, Key Temperatures, and Uses","How a laboratory water bath works, its parts and types, the exact temperatures that matter (37°C, 44-45°C for tempering agar, 56°C for inactivating complement), and when to use it instead of a hot plate or incubator.","","2022-10-25",[201,204,207,210,213,216],{"question":202,"answer":203},"\u003Cp>What is a water bath used for in a microbiology laboratory?\u003C\u002Fp>","\u003Cp>A water bath holds samples at a precise, constant temperature using gentle, even heat. Common uses are warming media and reagents to 37°C, tempering molten agar to about 45°C before pouring, and inactivating complement in serum at 56°C for 30 minutes.\u003C\u002Fp>",{"question":205,"answer":206},"\u003Cp>Why is molten agar cooled to 45°C in a water bath before pouring?\u003C\u002Fp>","\u003Cp>Agar poured too hot destroys heat-sensitive additives. Holding it at 44–45°C keeps it liquid enough to pour while cool enough to add blood, antibiotics, or other supplements without killing or denaturing them. Poured too hot, blood cells lyse and the plates turn brown.\u003C\u002Fp>",{"question":208,"answer":209},"\u003Cp>Why is serum inactivated at 56°C?\u003C\u002Fp>","\u003Cp>Complement proteins in serum are heat-labile and are destroyed by holding the serum at 56°C for 30 minutes. This step is done before many serological tests so that complement does not interfere with the reaction being measured.\u003C\u002Fp>",{"question":211,"answer":212},"\u003Cp>What is the difference between a water bath and a hot plate?\u003C\u002Fp>","\u003Cp>A water bath gives gentle, even, wet heat and cannot exceed about 100°C, so it cannot scorch and is ideal for precise, heat-sensitive work. A hot plate gives high, direct, dry heat up to about 350°C, which is better for boiling and melting but can scorch and overshoot.\u003C\u002Fp>",{"question":214,"answer":215},"\u003Cp>Why should tap water not be used in a water bath?\u003C\u002Fp>","\u003Cp>Tap water contains ions and minerals that accelerate corrosion and leave scale on the heating element and tank. Distilled or deionized water is used instead, and the water should be changed regularly to prevent microbial growth.\u003C\u002Fp>",{"question":217,"answer":218},"\u003Cp>What temperature can a water bath reach?\u003C\u002Fp>","\u003Cp>A water bath can heat up to about 100°C, the boiling point of water. For higher temperatures, an oil bath (up to around 300°C), a silicone bath, or a sand bath is used instead.\u003C\u002Fp>",[69],{"slug":221,"title":222,"description":223,"seoTitle":42,"seoDescription":42,"author":84,"createdDate":224,"lastUpdatedDate":167,"draft":46,"category":47,"image":42,"faq":225,"tags":250},"hot-air-oven-parts-types-and-uses","Hot Air Oven: Parts, Types, and Uses","How a hot air oven sterilizes by dry heat: its parts, forced-air vs static-air types, the correct time-temperature cycles, how to load and wrap glassware, and why you must let it cool before opening the door.","2022-06-02",[226,229,232,235,238,241,244,247],{"question":227,"answer":228},"What is a hot air oven used for?","A hot air oven sterilizes dry, heat-stable materials using dry heat: glassware, metal instruments, powders, oils, fats, and petroleum jelly. It is the method of choice for items that steam cannot penetrate or that moisture would damage. It is not used for plastics, rubber, or most liquids.",{"question":230,"answer":231},"What is the standard temperature and time for a hot air oven?","The standard cycle is 160°C for 60 minutes. Other valid combinations are 180°C for 20 minutes, 170°C for 30 minutes, and 150°C for 150 minutes or longer. Holding time is counted from when the entire load reaches the set temperature, not from when the oven display first reaches it.",{"question":233,"answer":234},"Why must a hot air oven cool before opening?","Glass conducts heat slowly and cracks under sudden temperature change. Opening the door while the oven is hot lets cold air hit the hot glassware, and the thermal shock fractures it. Allow the oven to cool to about 40 to 60°C, with the door closed, before opening.",{"question":236,"answer":237},"What biological indicator is used for a hot air oven?","Spores of Bacillus atrophaeus, the same organism used for ethylene oxide sterilization. They are more resistant to dry heat than the Geobacillus stearothermophilus spores used to validate the autoclave, so the two methods use different indicators.",{"question":239,"answer":240},"Why can't oils and powders be sterilized in an autoclave?","Steam sterilization depends on water contacting the material throughout. Oils and petroleum jelly repel water, so steam never penetrates past the surface, and powders clump when moisture is introduced. Dry heat, which needs no water, is required for these items.",{"question":242,"answer":243},"What is the difference between a static-air and a forced-air hot air oven?","A static-air oven has no fan and relies on hot air rising by gravity convection, so heating is slower and the temperature less uniform, cooler at the bottom, hotter at the top. A forced-air oven uses a fan to circulate the air, giving faster and more even heating throughout the chamber.",{"question":245,"answer":246},"Can plastic and rubber be sterilized in a hot air oven?","No. The temperatures required (150 to 180°C) melt or degrade most plastics and rubber. Use an autoclave, ethylene oxide, or low-temperature sterilization for those materials instead.",{"question":248,"answer":249},"How should glassware be prepared before hot air oven sterilization?","Make sure items are completely dry. Plug the open ends of test tubes, flasks, and pipettes with non-absorbent cotton wool, or cap them with aluminum. Wrap or cover open ends with aluminum foil or paper, and arrange items with space between them so hot air can circulate freely. Do not overload the chamber, since crowding creates cold spots.",[251,69],"sterilization-disinfection",{"enabled":253,"threads":254,"total":255},true,[],0,[257,264,270,276,281,286,292,297,303,306,312],{"slug":258,"name":259,"description":260,"image":261,"body":262,"postCount":263},"acharya-tankeshwar","Acharya Tankeshwar","Editor-in-chief","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Ftankeshwar-acharya-author-microbeonline.jpg","***Tankeshwar Acharya, MSc (Medical Microbiology)***\n\n*Tankeshwar Acharya is an Assistant Professor in the Department of Microbiology at Patan Academy of Health Sciences (PAHS), Nepal, where he has been teaching and practicing clinical microbiology for over 14 years. He is the founder of Microbe Online, one of the leading free microbiology education resources on the web, covering bacteriology, mycology, parasitology, immunology, and clinical laboratory diagnostics written from direct experience in both the classroom and the diagnostic laboratory.*",468,{"slug":265,"name":75,"description":266,"image":267,"body":268,"postCount":269},"ashma-shrestha","SEO Copywriter and Science Communicator\nKathmandu, Nepal","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fashma-shrestha.png","Ashma Shrestha holds a Master of Science in Medical Microbiology from the Institute of Science and Technology (IOST), Tribhuvan University, Nepal, where she developed a strong foundation in virology, molecular biology, and diagnostic microbiology.\n\nShe now works as an SEO Copywriter at Resolution Digital, where she combines her scientific training with research-driven content strategy. She is certified in Google Analytics and Google Business Profile (GBP), and brings a data-informed approach to science communication writing content that is not only accurate but structured to reach and serve the students who need it most.\n\nAt microbeonline, Ashma contributes articles primarily in virology and molecular biology, areas she finds most compelling for their mechanistic depth and their growing clinical relevance. Her writing reflects the same standard the site is built on: factual rigor, clear explanation of the *why* behind microbiology concepts, and content that helps students move from memorization to genuine understanding.\n\nShe is passionate about making complex microbiological concepts accessible without sacrificing accuracy; a skill that sits at the intersection of her scientific training and her professional work in content and SEO.",78,{"slug":271,"name":84,"description":272,"image":273,"body":274,"postCount":275},"sushmita-baniya","Author \u002F Contributor","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fsushmita-baniya-1.png","Sushmita Baniya holds an M.Sc. in Medical Microbiology from Tribhuvan University (National College), with a research focus in Genetics and Molecular Biology. She is actively involved in teaching and research in the field of microbiology.",26,{"slug":277,"name":43,"description":272,"image":278,"body":279,"postCount":280},"samikshya-acharya","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fsamikshya-acharya.jpeg","Samikshya Sharma completed her postgraduate studies in Medical Microbiology at the Central Department of Microbiology, Tribhuvan University, Nepal. She contributes to Microbeonline with the goal of making foundational and clinical microbiology concepts clear and useful for students in medical, laboratory science, and allied health programs.",20,{"slug":282,"name":283,"description":272,"image":42,"body":284,"postCount":285},"alisha-tripathi","Alisha Tripathi","Alisha Tripathi holds an M.Sc. in Medical Microbiology from National College, Tribhuvan University. With over a year of teaching experience, her academic interests span Molecular Biology, Immunology, and Genetics.",6,{"slug":287,"name":288,"description":289,"image":42,"body":290,"postCount":291},"aastha-shrestha","Aastha Shrestha"," Author \u002F Contributor","Aastha Shrestha is a Biotechnology graduate with an M.Sc. from National College, Tribhuvan University. Her academic interests center on Molecular Biology and Immunology; two fields that are increasingly converging in modern diagnostic and clinical microbiology. \n\nShe contributes to Microbeonline with the goal of making complex concepts in these areas approachable and exam-relevant for students across medical, biotechnology, and laboratory science programs.",9,{"slug":293,"name":294,"description":295,"image":42,"body":42,"postCount":296},"guest-author","Guest Author","Guest Author \u002F Contributor",1,{"slug":298,"name":299,"description":272,"image":300,"body":301,"postCount":302},"srijana-khanal","Srijana Khanal","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fsrijana-khanal-1.png","Srijana Khanal is a microbiology educator with nearly a decade of teaching experience, including her role as faculty in the Microbiology Department at National College, NIST. \n\nHer time in the classroom has given her a clear sense of where students struggle and what explanations actually work, a perspective that directly shapes how she writes.\n\nHer academic interests span Immunology, Genetics, Basic Sciences, and Research Methodology, and she brings the same rigor to her writing that she brought to teaching. Alongside academic writing, she has a passion for creative writing -- an instinct that shows in her ability to make dense scientific material readable without sacrificing accuracy.\n\nShe contributes to Microbeonline to extend her teaching reach beyond the classroom, helping medical and laboratory science students across the region build a stronger foundation in microbiology.",17,{"slug":304,"name":305,"description":295,"image":42,"body":42,"postCount":296},"dr-poonam-acharya","Dr. Poonam Acharya",{"slug":307,"name":111,"description":308,"image":309,"body":310,"postCount":311},"nisha-rijal","Microbiologist and AMR Specialist Kathmandu, Nepal","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fnisha-rijal-1.png","Nisha Rijal is a microbiologist with nearly 15 years of frontline diagnostic and surveillance experience at the National Public Health Laboratory (NPHL), national reference laboratory under the Department of Health Services, Nepal. She currently works as an AMR Support Officer at the World Health Organization (WHO), Nepal, where her work focuses on strengthening antimicrobial resistance surveillance systems and translating AMR data into actionable public health response.\n\nHer research, published in peer-reviewed journals and cited over 220 times, spans some of the most clinically significant infectious disease challenges in Nepal and South Asia: antimicrobial resistance trends in *Vibrio cholerae* across an 11-year national surveillance dataset, sero-epidemiology of scrub typhus in patients with acute febrile illness, lower respiratory tract infections in HIV-positive patients, and gonococcal resistance surveillance. She was a contributor to Nepal's National Antimicrobial Resistance Containment Action Plan, a foundational policy document for AMR governance in Nepal. You can find list of [Nisha Rijal's article here in Google Scholar.](https:\u002F\u002Fscholar.google.com\u002Fcitations?user=N-Ruq54AAAAJ&hl=en)\n\nThis depth of experience is visible in her writing at Microbeonline. Her 53 published articles cover bacteriology, parasitology, mycology, immunology, and laboratory techniques, and are consistently among the most detailed and clinically grounded content on the site. She brings to every article the same standard that national reference laboratory work demands: methodological precision, awareness of real diagnostic constraints, and an understanding of what results actually mean for patient care in resource-limited settings.\n\nHer areas of particular expertise include antimicrobial susceptibility testing and resistance mechanism detection, quality assurance in clinical microbiology, and laboratory-based infectious disease surveillance.\n\n---\n\n*Nisha Rijal contributes to Microbeonline in a personal capacity. Her views and writing do not represent the positions of the World Health Organization or any other institution.*",54,{"slug":313,"name":314,"description":315,"image":316,"body":317,"postCount":296},"padma-shrestha","Padma Shrestha","Author","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fpadma-shrestha.png","Padma Shrestha is from Kathmandu, Nepal. She has completed Masters degree in Medical microbiology from Tribhuvan University. She has great interest in Microbiology and Molecular Biology.",[319,326,332,337,342,347,351,355,359,364,368,373,377,381,386,390,394,398,403,408,412,416,420,425,428,432,436,440,445,450,454,458,462,466,470,474,478,482,486,490,494,498,502,506,510,514,518,522,526,530,534,538,542,546,550,554,558,562,566,570,574,578,582,586,590,594,598,602,605,609],{"slug":320,"name":321,"description":322,"image":323,"body":324,"postCount":325},"gram-negative-cocci","Gram-Negative Cocci and Coccobacilli","Neisseria, Moraxella, Haemophilus and related gram-negative coccal organisms","https:\u002F\u002Fassets.microbeonline.com\u002Ftags\u002Fgram-negative-cocci.png","# Gram Negative Cocci\n\nNeisseria gonorrhoeae, Neisseria meningitides, Moraxella catarrhalis, and other Neisseria spp. are clinically relevant gram-negative cocci.\n\nN. gonorrhoeae is the leading cause of sexually transmitted disease whereas N. meningitides is a leading cause of fatal bacterial meningitis.",14,{"slug":327,"name":328,"description":329,"image":42,"body":330,"postCount":331},"microscopy","Microscopy","Microscope types, components, and microscopy techniques","These are list of blog posts related to microscopy. ",12,{"slug":333,"name":334,"description":335,"image":42,"body":42,"postCount":336},"gram-positive-cocci","Gram-Positive Cocci","Staphylococcus, Streptococcus, Enterococcus, Micrococcus — organisms, diseases, and identification tests",11,{"slug":338,"name":339,"description":340,"image":42,"body":42,"postCount":341},"gram-negative-rods","Gram-Negative Rods (Other than Enterobacteriaceae)","\u003Cp>Gram negative rods other than members of Enterobacteriaceae family such as  Pseudomonas, Acinetobacter and related organisms\u003C\u002Fp>",5,{"slug":343,"name":344,"description":345,"image":42,"body":42,"postCount":346},"gram-positive-rods","Gram-Positive Rods","Bacillus, Clostridium, Listeria, Corynebacterium, Actinomyces and related organisms",8,{"slug":348,"name":349,"description":350,"image":42,"body":42,"postCount":336},"mycobacteria","Mycobacteria","Mycobacterium tuberculosis, leprosy, atypical mycobacteria, and acid-fast organism diagnosis",{"slug":352,"name":353,"description":354,"image":42,"body":42,"postCount":336},"anaerobic-bacteriology","Anaerobic Bacteriology","Anaerobic organisms, anaerobic culture methods, and anaerobic infection diagnosis",{"slug":356,"name":357,"description":358,"image":42,"body":42,"postCount":331},"enterobacteriaceae","Enterobacteriaceae","Identification, differentiation, and clinical significance of Enterobacteriaceae family members",{"slug":360,"name":361,"description":362,"image":42,"body":42,"postCount":363},"spirochetes","Spirochetes","Treponema, Leptospira, Borrelia and spirochetal infections",7,{"slug":365,"name":366,"description":367,"image":42,"body":42,"postCount":325},"food-microbiology","Food Microbiology","Food-borne pathogens, food safety, spoilage, and preservation",{"slug":369,"name":370,"description":371,"image":42,"body":42,"postCount":372},"antimicrobial-susceptibility-testing","Antimicrobial Susceptibility Testing","Methods for testing antibiotic susceptibility in clinical microbiology",21,{"slug":374,"name":375,"description":376,"image":42,"body":42,"postCount":346},"antimicrobials-moa-amr","Antimicrobials (MOA & AMR)","Mechanisms, detection, and clinical significance of antimicrobial resistance",{"slug":251,"name":378,"description":379,"image":42,"body":42,"postCount":380},"Sterilization and Disinfection","Methods of sterilization and disinfection in healthcare and laboratory settings",10,{"slug":382,"name":383,"description":384,"image":42,"body":42,"postCount":385},"specimen-collection-transport","Specimen Collection and Transport","Collection, handling, and transport of clinical specimens for microbiological testing",27,{"slug":387,"name":388,"description":389,"image":42,"body":42,"postCount":372},"bacterial-structure-physiology","Bacterial Structure and Physiology","Bacterial cell structure, growth, physiology, and environmental factors affecting growth",{"slug":391,"name":392,"description":42,"image":42,"body":393,"postCount":285},"horizontal-gene-transfer","Horizontal Gene Transfer","Articles related to **Horizontal Gene Transfer**",{"slug":395,"name":396,"description":42,"image":42,"body":397,"postCount":380},"chromatography","Chromatography","Information about chromatographic techniques.",{"slug":399,"name":400,"description":401,"image":42,"body":402,"postCount":363},"electrophoresis","Electrophoresis","Information about Electrophoresis Techniques ","Detailed information  about Electrophoresis Techniques ",{"slug":404,"name":405,"description":406,"image":42,"body":407,"postCount":285},"pcr-techniques","PCR Techniques","Information about various types of Polymerase Chain Reaction Techniques ","More detailed information about various types of Polymerase Chain Reaction Techniques ",{"slug":409,"name":410,"description":411,"image":42,"body":42,"postCount":285},"bacteriophage","Bacteriophage","Description about Bacteriophage.",{"slug":413,"name":414,"description":415,"image":42,"body":42,"postCount":285},"malaria","Malaria","It is the collections of articles regarding malarial disease. ",{"slug":417,"name":418,"description":419,"image":42,"body":42,"postCount":285},"anaerobic-culture-techniques","Anaerobic Culture Techniques","Posts related with Anaerobic Culture Techniques.",{"slug":421,"name":422,"description":423,"image":42,"body":42,"postCount":424},"immunoassays","Immunoassays","You will get information about all the diagnostic tests that rely on the specific binding between an antigen and an antibody to detect or quantify a substance.",19,{"slug":138,"name":426,"description":427,"image":42,"body":42,"postCount":363},"Biosafety levels ","Articles related to Biosafety Levels",{"slug":429,"name":430,"description":431,"image":42,"body":42,"postCount":341},"environmental-factors","Environmental Factors ","In this case we are talking about growth requirements of microorganisms with deep dive in environmental factors that affect the growth. ",{"slug":433,"name":434,"description":435,"image":42,"body":42,"postCount":285},"pipette","Pipette","Posts related with Pipette. ",{"slug":437,"name":438,"description":439,"image":42,"body":42,"postCount":346},"bacteriology-mcqs","Bacteriology MCQs","This sections lists MCQs in Bacteriology.",{"slug":441,"name":442,"description":443,"image":42,"body":42,"postCount":444},"parasitology-mcqs","Parasitology MCQs","This section lists MCQs in Parasitology.",2,{"slug":446,"name":447,"description":448,"image":42,"body":42,"postCount":449},"virology-mcqs","Virology MCQs","This is the collections of Multiple Choice Questions in Virology.",4,{"slug":451,"name":452,"description":453,"image":42,"body":42,"postCount":341},"mcqs-in-microbiology","MCQs in Microbiology","This section lists the collections of Multiple Choice Questions in General Microbiology Topics. ",{"slug":455,"name":456,"description":457,"image":42,"body":42,"postCount":346},"immunology-mcqs","Immunology MCQs","In this section; we are posting collections of Multiple Choice Questions about Immunology. ",{"slug":459,"name":460,"description":461,"image":42,"body":42,"postCount":291},"microbial-curiosities","Microbial Curiosities","In this clusters, we are posting interesting and unique information about Microorganisms. ",{"slug":463,"name":464,"description":465,"image":42,"body":42,"postCount":372},"bacterial-culture-media","Bacterial Culture Media","Posts related to Bacterial Culture Media. ",{"slug":467,"name":468,"description":469,"image":42,"body":42,"postCount":285},"fungal-culture-media","Fungal Culture Media","Posts related to Fungal Culture Media.",{"slug":471,"name":472,"description":473,"image":42,"body":42,"postCount":341},"motility-test","Motility Test","This lists the procedure regarding various tests methods for bacterial motility.",{"slug":475,"name":476,"description":477,"image":42,"body":42,"postCount":380},"bacterial-enumeration","Bacterial enumeration","These posts are related to isolation and enumeration of bacteria. ",{"slug":479,"name":480,"description":481,"image":42,"body":42,"postCount":444},"gram-positive-coccobacillus","Gram-positive coccobacillus","List of Gram Positive Coccobacilli",{"slug":483,"name":484,"description":485,"image":42,"body":42,"postCount":449},"dimorphic-fungi","Dimorphic Fungi","This is about various dimorphic fungi. ",{"slug":487,"name":488,"description":489,"image":42,"body":42,"postCount":363},"bacterial-classification","Bacterial Classification","These posts are related with various approaches used for the classification of Bacteria. ",{"slug":491,"name":492,"description":493,"image":42,"body":42,"postCount":341},"immunofluorescence","Immunofluorescence ","Various Tests related to Immunofluorescence ",{"slug":495,"name":496,"description":497,"image":42,"body":42,"postCount":291},"antibody-mediated-immunity","Antibody-mediated Immunity","This clusters links the articles that are sharing insights about Antibody-mediated immunity. ",{"slug":499,"name":500,"description":501,"image":42,"body":42,"postCount":363},"hypersensitivity","Hypersensitivity","Articles related to Hypersensitivity.",{"slug":503,"name":504,"description":42,"image":42,"body":42,"postCount":505},"haemophilus","Haemophilus",3,{"slug":507,"name":508,"description":509,"image":42,"body":42,"postCount":449},"sexually-transmitted-infections-stis","Sexually transmitted infections (STIs)","This is the clusters of infections that are transmitted sexually. ",{"slug":511,"name":512,"description":513,"image":42,"body":42,"postCount":331},"adaptive-immunity","Adaptive Immunity","Blog posts related to B Cell Immunity and T Cell Immunity.",{"slug":515,"name":516,"description":517,"image":42,"body":42,"postCount":325},"fungal-diagnostics","Fungal Diagnostics","Various methods used for the Diagnosis of Fungal Infections. ",{"slug":519,"name":520,"description":521,"image":42,"body":42,"postCount":341},"laboratory-storage-and-preservation","Laboratory Storage and Preservation","Articles about Laboratory Storage of Antimicrobial Disk, Test organisms and Equipment used for this process. ",{"slug":69,"name":523,"description":524,"image":42,"body":525,"postCount":285},"Laboratory Heating Equipment","A guide to laboratory heating equipment, including hot plates, water baths, Bunsen burners, incubators, and dry baths, and how to choose the right one for each task.","Laboratory heating equipment covers the instruments that warm, melt, incubate, or sterilize samples and media in a microbiology laboratory. Each one delivers heat differently. \n\nA hot plate gives high, direct, dry heat; a water bath gives gentle, even, wet heat up to about 100°C; a Bunsen burner gives an open flame for rapid, very high heat; an incubator holds cultures at a steady temperature over hours or days; and a dry bath heats small tubes without water. Choosing the right one depends on the temperature you need, how precise it must be, and whether the sample can tolerate direct or open-flame heat.\n\nThe articles below cover each piece of heating equipment in detail, including its parts, working principle, uses, and the mistakes that most often go wrong at the bench.",{"slug":527,"name":528,"description":529,"image":42,"body":42,"postCount":346},"laboratory-glassware","Laboratory Glassware","Posts about Laboratory Glassware. ",{"slug":531,"name":532,"description":533,"image":42,"body":42,"postCount":285},"helminths","Helminths","In this section, we are covering properties, life cycle, pathogenesis and laboratory diagnosis of Helminths\u002FHelminthic infestations. ",{"slug":535,"name":536,"description":537,"image":42,"body":42,"postCount":285},"protozoan-parasite","Protozoan Parasite","In this cluster, we are covering protozoan parasites. ",{"slug":539,"name":540,"description":541,"image":42,"body":42,"postCount":296},"tests-for-gram-positive-cocci","Biochemical Tests for Gram Positive Cocci","This is the lists of Biochemical Tests that are used for Gram Positive Cocci. ",{"slug":543,"name":544,"description":545,"image":42,"body":42,"postCount":380},"bacterial-staining-technique","Bacterial Staining Technique","Lists of various staining techniques that are used to stain bacteria. ",{"slug":547,"name":548,"description":549,"image":42,"body":42,"postCount":280},"enzyme-tests","Enzyme Tests","\u003Cp>Various Biochemical Test that are based on enzymatic activity of the microorganisms. \u003C\u002Fp>",{"slug":551,"name":552,"description":553,"image":42,"body":42,"postCount":336},"carbohydrate-utilization","Carbohydrate Utilization","\u003Cp>Various biochemical tests which are related to Carbohydrate fermentation or Utilization\u003C\u002Fp>",{"slug":555,"name":556,"description":557,"image":42,"body":42,"postCount":341},"susceptibility-based-id","Susceptibility-based ID","\u003Cp>These are susceptibility based identification test such as optochin sensitivity, bacitracin sensitivity etc. \u003C\u002Fp>",{"slug":559,"name":560,"description":561,"image":42,"body":42,"postCount":449},"microbial-metabolism","Microbial Metabolism","\u003Cp>Tests about Microbial Metabolism. \u003C\u002Fp>",{"slug":563,"name":564,"description":565,"image":42,"body":42,"postCount":346},"substrate-utilization","Substrate Utilization","\u003Cp>The test in which a non-sugar carbon\u002Fnitrogen source is used or degraded (citrate, malonate, decarboxylases, indole, PAD).\u003C\u002Fp>",{"slug":567,"name":568,"description":569,"image":42,"body":42,"postCount":505},"atypical-pneumonia","Atypical Pneumonia","\u003Cp>Organisms responsible for Atypical Pneumonia. \u003C\u002Fp>",{"slug":571,"name":572,"description":573,"image":42,"body":42,"postCount":341},"antigen","Antigen","\u003Cp>Various articles related to Antigens.\u003C\u002Fp>",{"slug":575,"name":576,"description":577,"image":42,"body":42,"postCount":363},"innate-immunity","Innate Immunity","\u003Cp>Articles related to Innate Immunity. \u003C\u002Fp>",{"slug":579,"name":580,"description":581,"image":42,"body":42,"postCount":449},"respiratory-tract-infection","Respiratory Tract Infection","\u003Cp>In this cluster, you can see various etiological agents that causes respiratory tract infection. \u003C\u002Fp>",{"slug":583,"name":584,"description":585,"image":42,"body":42,"postCount":341},"torch-infection","TORCH Infection","\u003Cp>In this section; you can find articles related with TOCH infection. \u003C\u002Fp>",{"slug":587,"name":588,"description":589,"image":42,"body":42,"postCount":363},"microbiology-for-beginners","Microbiology for Beginners","\u003Cp>These articles are very basic articles, which will share general concepts in Microbiology. \u003C\u002Fp>",{"slug":591,"name":592,"description":593,"image":42,"body":42,"postCount":285},"dna-replication","DNA Replication","\u003Cp>Articles related to DNA and Replication of DNA. \u003C\u002Fp>",{"slug":595,"name":596,"description":597,"image":42,"body":42,"postCount":363},"genetic-code","Genetic Code","\u003Cp>Articles related to Genetic Code.\u003C\u002Fp>",{"slug":599,"name":600,"description":601,"image":42,"body":42,"postCount":341},"molecular-technique","Molecular Technique","\u003Cp>Posts related to Molecular Techniques. \u003C\u002Fp>",{"slug":603,"name":604,"description":42,"image":42,"body":42,"postCount":296},"colorimetric-assay","Colorimetric Assay ",{"slug":606,"name":607,"description":608,"image":42,"body":42,"postCount":341},"pharmaceutical-microbiology","Pharmaceutical Microbiology","\u003Cp>Various articles related to Pharmaceutical Microbiology\u003C\u002Fp>",{"slug":610,"name":611,"description":42,"image":42,"body":42,"postCount":505},"blood-and-immune-cells","Blood and Immune Cells"]