[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fxLN3MUwXCdr5RPjwZYIDpOj8CHyjOmngWTgoKXPtZbg":3,"$fu-7JPiJ5A_5D8QQMDpfG3uCT0cOcg14k3mmxW3lb_tI":36,"$f3Ft0rKFJHppdzE-vuveecxx1BUcg9iOlMLtyzf_MJDg":265,"$fucxFBm2ZjZfGSdmdRaSNGBI_F0jJme4f0GTvzUhQfL8":329},[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},"Authors","authors","\u002Fauthors\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},"Tags","tags","\u002Ftags\u002F",{"type":37,"data":38},"blog",{"slug":39,"title":40,"description":41,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":44,"lastUpdatedDate":44,"draft":45,"category":46,"image":42,"body":47,"faq":48,"commentsClosed":45,"tags":64,"related":66,"comments":261},"automated-identification-and-antimicrobial-susceptibility-testing","Automated Identification and Antimicrobial Susceptibility Testing","\u003Cp>How automated systems identify bacteria and generate MICs, how they differ from manual methods, and when an automated result should be confirmed before it is reported.\u003C\u002Fp>",null,"Nisha Rijal","2026-08-31",false,"bacteriology","An automated analyzer reports an organism as susceptible to a last-line antibiotic, and the report is ready to sign out. But the system has also raised a small flag next to the result.\n\nWhether the microbiologist trusts the susceptible call or holds it for confirmation is a judgment the machine cannot make, and getting it right is the difference between a safe report and a dangerous one.\n\n## What automated ID\u002FAST systems do\n\nAutomated identification and susceptibility systems carry out two tasks that were once done manually: **they identify which organism is present, and they measure the susceptibility of the isolate to a panel of antibiotics**. A single loaded card or panel does both. The microbiologist prepares a standardized suspension of the organism, loads it, and the instrument incubates, reads, and interprets, producing an organism name and a set of minimum inhibitory concentrations with susceptible, intermediate, or resistant categories.\n\nThe value of these systems is speed, standardization, and throughput. They shorten the time to a result, remove some of the reader-to-reader variation of manual methods, and let a laboratory process many isolates at once.\n\nWhat they do not remove is the need for a microbiologist to judge whether a given result makes sense.\n\n## How automated identification works\n\nAutomated identification is the same logic as a manual biochemical panel, scaled up and read by machine. Instead of a technologist inoculating a strip of biochemical tests and reading color changes, as in a [manual API panel](https:\u002F\u002Fmicrobeonline.com\u002Fapi-20e-test-system-introduction-procedure-results-interpretations\u002F). The instrument runs a miniaturized panel of many biochemical or enzymatic reactions in the wells of a card, incubates it, and reads each well optically at intervals.\n\nEach organism produces a characteristic pattern of positive and negative reactions across the panel. The instrument compares that pattern against a database of known profiles and returns the best match, together with a confidence measure. A high-confidence match is reported; a low-confidence or ambiguous match is flagged for the microbiologist to resolve, often with additional tests.\n\nA separate and now widely used identification technology, [MALDI-TOF mass spectrometry](https:\u002F\u002Fmicrobeonline.com\u002Fmaldi-tof-ms-principle-applications-microbiology\u002F), identifies organisms by their protein fingerprint rather than their biochemical reactions, and is faster still. It is covered on its own page; the two approaches answer the same question by different means.\n\n## How automated susceptibility testing works\n\nAutomated AST is, in principle, a miniaturized [broth dilution](https:\u002F\u002Fmicrobeonline.com\u002Fminimum-inhibitory-concentration-mic-broth-dilution-method-procedure-interpretation\u002F). The organism is exposed to a series of antibiotic concentrations in the wells of the card, and the instrument measures bacterial growth in each well over time, usually by turbidity or fluorescence. The lowest concentration that inhibits visible growth is the minimum inhibitory concentration, exactly as in a manual MIC, but read by the instrument instead of humans. The full definition and manual method of the MIC is covered in [MIC article](https:\u002F\u002Fmicrobeonline.com\u002Fminimum-inhibitory-concentration-and-minimum-bactericidal-concentration-mbc\u002F).\n\nTwo features distinguish automated AST from a manual MIC.\n\n1. First, many systems use rapid or kinetic reading: rather than waiting a fixed overnight period, they read growth repeatedly and can report once the pattern is clear, shortening turnaround.\n2. Second, the instrument converts each MIC to a susceptible, intermediate, or resistant category using current breakpoints, and it applies an expert system, discussed next, that checks the results for internal consistency.\n\n## The expert system\n\nThis is the feature that separates using an automated system from trusting it blindly, and it is the part that most tests a microbiologist's judgment.\n\nAn automated system does not only report MICs. It runs the whole antibiogram through a rules engine that knows what resistance patterns are biologically plausible for the identified organism. When a result does not fit, the system raises a flag rather than silently reporting it. The microbiologist's job is to understand why the flag was raised and what to do about it.\n\n**Three kinds of check matter most:**\n\n**1. Unusual or impossible phenotypes.** Some resistance results should not occur for a given organism, and some susceptible results are implausible given the organism's known mechanisms. If a system reports a phenotype that is inconsistent with the identification, either the identification is wrong, the susceptibility result is wrong, or a genuinely rare mechanism is present. All three require action, not a signature.\n\n*Example:* a system reports *Staphylococcus aureus* as vancomycin-resistant. True vancomycin resistance in *S. aureus* (VRSA) is extremely rare, so the far more likely explanations are a mixed or misidentified culture, or an error in the well. The result is held, the identification and purity are rechecked, and vancomycin is confirmed by a reference method before anything is reported. Reporting VRSA off a single automated flag, without confirmation, would be a serious error.\n\n**2. Intrinsic resistance.** Every organism is [intrinsically resistant to certain antimicrobial agents](https:\u002F\u002Fmicrobeonline.com\u002Flists-bacterial-pathogens-intrinsic-antibiotic-resistance\u002F) regardless of testing, and a system that reports such an organism as susceptible to an agent it should always resist has produced a result that must not be reported as susceptible. The expert system catches these, but the microbiologist must know the intrinsic-resistance patterns to act on the flag.\n\n*Example:* a system reports *Klebsiella pneumoniae* as susceptible to ampicillin. *Klebsiella* carries a chromosomal beta-lactamase (SHV) and is intrinsically resistant to ampicillin, so a susceptible result is biologically impossible. Whatever the well showed, the report must not go out as susceptible. The expert system suppresses or corrects the result, and the microbiologist confirms the pattern fits the identification.\n\n**3. Resistance mechanisms that need confirmation.** Certain results signal a resistance mechanism whose detection changes the whole report, such as an [extended-spectrum beta-lactamase](https:\u002F\u002Fmicrobeonline.com\u002Fbetalactamase-classification\u002F), an [AmpC](https:\u002F\u002Fmicrobeonline.com\u002Fampc-beta-lactamase-detection\u002F), or a [carbapenemase](https:\u002F\u002Fmicrobeonline.com\u002Fphenotypic-methods-for-the-detection-of-carbapenemases\u002F). A flagged result of this kind is a prompt to run the appropriate confirmatory test, not to report the raw susceptibility.\n\n*Example:* a system flags *Escherichia coli* with a raised cefotaxime or ceftazidime MIC as a possible ESBL producer. The raw MICs are not reported as they stand; the isolate goes to a confirmatory test (such as a combination-disc or combination-strip test comparing the cephalosporin alone against the cephalosporin plus clavulanic acid). The confirmed mechanism, not the raw number, determines how the whole beta-lactam panel is reported.\n\n**The rule that ties these together:** an automated result is a strong first pass, but a flagged result is a question, not an answer. The competency is knowing which flags can be released, which need a repeat, and which need a confirmatory method.\n\n## When to trust and when to confirm\n\nFor a working microbiologist this is the practical core of the topic.\n\n1. Trust the automated result when the identification is high-confidence, the susceptibility pattern is consistent with that organism, and no flag has been raised. This is the majority of isolates, and reporting them promptly is the point of automation.\n2. Hold and confirm when the identification confidence is low, when the phenotype is inconsistent or unusual, when the system flags a mechanism such as ESBL, AmpC, or carbapenemase, or when the result conflicts with the clinical picture or with a reliable manual result. Confirmation may mean repeating the test, running a manual method such as [disc diffusion](https:\u002F\u002Fmicrobeonline.com\u002Fantimicrobial-susceptibility-testing-procedure-modified-kirby-bauer-method\u002F) or [a gradient MIC strip](https:\u002F\u002Fmicrobeonline.com\u002Fe-test-epsilometer-test-principle-purpose-procedure-results-and-interpretations\u002F), or performing a specific mechanism-detection test.\n\nSome agents are known to be less reliable on automated systems for certain organisms, and many laboratories have a standing policy to confirm those particular organism-drug combinations by an alternative method regardless of the automated result. Knowing the local confirmation policy is part of the competency.\n\n## Automated versus manual methods\n\nAutomated systems are faster, more standardized, and higher-throughput, and they add an expert-system safety net that manual methods do not have. Against that, they are expensive, they depend on proprietary cards and a maintained database, they can be less reliable for unusual organisms or newer resistance mechanisms not yet in the database, and they still require manual confirmation for flagged results.\n\nManual methods, disc diffusion and manual MIC, are cheaper, more flexible for unusual isolates, and independent of a specific platform, but they are slower, more labor-intensive, and more subject to reader variation.\n\nMost laboratories use both: the automated system for routine throughput, and manual methods for confirmation, for organisms the system handles poorly, and as a fallback.\n\n## Limitations\n\nAutomated systems depend on a correctly prepared, pure, standardized inoculum; a mixed or wrong-density suspension produces a wrong result no matter how good the instrument is.\n\nTheir databases can lag behind newly described organisms and emerging resistance mechanisms, so a novel phenotype may be missed or misread.\n\nThey are costly to buy and run and tie a laboratory to proprietary consumables. They report categories against current breakpoints, so a system running outdated breakpoints will miscategorize results. None of these systems removes the need for a microbiologist to interpret flagged and clinically discordant results.\n\n## How to remember\n\n- **The machine identifies and measures; the microbiologist judges.** Automated ID is a biochemical panel read by machine; automated AST is a broth-dilution MIC read by machine. Both scale the manual method; neither replaces the judgment.\n- **A flag is a question, not an answer.** No flag and a consistent phenotype means release. A flag means ask why: wrong ID, intrinsic resistance, or a mechanism (ESBL, AmpC, carbapenemase) that needs confirmation.\n- **Trust the routine, confirm the unusual.** Speed on the many, scrutiny on the few.\n\n## Key exam facts\n\n| Fact | Detail |\n| --- | --- |\n| Two functions | Organism identification and antimicrobial susceptibility (MIC) |\n| ID principle | Miniaturized biochemical\u002Fenzymatic panel read optically, matched to a database |\n| AST principle | Miniaturized broth dilution; growth read by turbidity or fluorescence to give an MIC |\n| Reading | Often rapid\u002Fkinetic, shortening turnaround versus overnight manual reading |\n| Expert system | Rules engine that flags implausible, intrinsic-resistance, or mechanism-suggesting results |\n| Example flags to confirm | ESBL, AmpC, carbapenemase; intrinsic resistance; ID-phenotype mismatch |\n| Trust when | High-confidence ID, consistent phenotype, no flag |\n| Confirm when | Low-confidence ID, unusual phenotype, mechanism flag, or clinical discordance |\n| Versus manual | Faster, standardized, high-throughput, with a safety net; but costly, proprietary, weaker on unusual isolates |\n| Depends on | Pure, standardized inoculum and an up-to-date database and breakpoints |\n\n## Where students get confused\n\n**\"The automated system replaces the microbiologist.\"** It replaces the manual reading, not the judgment. Flagged results, unusual phenotypes, and clinically discordant results still need a microbiologist to interpret and confirm. Automation changes what the microbiologist spends time on; it does not remove them.\n\n**\"An automated MIC is a different thing from a manual MIC.\"** It is the same measurement, the lowest concentration that inhibits visible growth, read by the instrument. The definition and interpretation of the MIC are unchanged.\n\n**\"A susceptible result is always safe to report.\"** Not if the organism is intrinsically resistant to that agent, or if a flag has been raised. A susceptible call that contradicts the organism's known biology is a result to investigate, not to sign out.\n\n**\"A flag means the machine is broken.\"** A flag usually means the result is biologically implausible or suggests a resistance mechanism, which is the expert system working as intended. It is a prompt to check the identification or run a confirmatory test, not a malfunction.\n\n**\"Automated and manual methods give the same answer, so it does not matter which.\"** They agree for most routine isolates, but automated systems can struggle with unusual organisms and newer mechanisms, which is exactly why manual confirmation exists. The two are complementary, not interchangeable.\n\n## References\n\n1. Tille PM. *Bailey & Scott's Diagnostic Microbiology.* 15th ed. St. Louis: Elsevier; 2022.\n2. Procop GW, et al. *Koneman's Color Atlas and Textbook of Diagnostic Microbiology.* 7th ed. Philadelphia: Wolters Kluwer; 2017.\n3. Leber AL, editor. *Clinical Microbiology Procedures Handbook.* 4th ed. Washington, DC: ASM Press; 2016. doi:10.1128\u002F9781683670438.CMPH\n4. Clinical and Laboratory Standards Institute (CLSI). *Performance Standards for Antimicrobial Susceptibility Testing.* 35th Edition (2025).",[49,52,55,58,61],{"question":50,"answer":51},"\u003Cp>How do automated identification systems identify bacteria?\u003C\u002Fp>","\u003Cp>They run a miniaturized panel of biochemical or enzymatic reactions in the wells of a card, incubate it, and read each well optically. The pattern of reactions is matched against a database of known organism profiles, and the best match is reported with a confidence measure. A low-confidence match is flagged for the microbiologist to resolve.\u003C\u002Fp>",{"question":53,"answer":54},"\u003Cp>How is automated susceptibility testing different from a manual MIC?\u003C\u002Fp>","\u003Cp>It is the same principle. The organism is exposed to a range of antibiotic concentrations and the instrument measures growth in each well to find the lowest concentration that inhibits it, the MIC. The difference is that the instrument reads the growth, often rapidly, and converts the MIC to a susceptible, intermediate, or resistant category, whereas a manual MIC is set up and read by hand.\u003C\u002Fp>",{"question":56,"answer":57},"\u003Cp>What is an expert system in automated AST?\u003C\u002Fp>","\u003Cp>It is a rules engine that checks the susceptibility results against what is biologically plausible for the identified organism. It flags results that are inconsistent, that suggest intrinsic resistance, or that point to a resistance mechanism such as ESBL, AmpC, or carbapenemase, so the microbiologist can confirm them before reporting.\u003C\u002Fp>",{"question":59,"answer":60},"\u003Cp>When should an automated result be confirmed rather than reported?\u003C\u002Fp>","\u003Cp>Confirm when the identification confidence is low, when the resistance pattern is unusual or inconsistent with the organism, when the system flags a mechanism such as ESBL or carbapenemase, or when the result conflicts with the clinical picture. Confirmation may be a repeat test, a manual method, or a specific mechanism-detection test.\u003C\u002Fp>",{"question":62,"answer":63},"\u003Cp>Are automated systems better than disc diffusion?\u003C\u002Fp>","\u003Cp>They are faster, more standardized, and higher-throughput, and they add a safety net of expert-system checks. But they are more expensive, depend on proprietary cards and a current database, and can be less reliable for unusual organisms or newer resistance mechanisms. Most laboratories use automated systems for routine work and manual methods for confirmation and difficult isolates.\u003C\u002Fp>",[65],"antimicrobial-susceptibility-testing",[67,103,130,156,182,208,228,254],{"slug":68,"title":69,"description":70,"seoTitle":71,"seoDescription":72,"author":73,"createdDate":74,"lastUpdatedDate":75,"draft":45,"category":76,"image":42,"faq":77,"tags":99},"api-20e-test-system-introduction-procedure-results-interpretations","API 20E Test: Procedure, Reading the 21 Reactions, and the 7-Digit Profile Code","How to set up, incubate, and read the API 20E strip: which wells need oil, which need reagents, how to run the 21st test (oxidase), and how to build the 7-digit profile number for identification.","API 20E: Inoculation, Reading, Profile Number, and Identification","Prepare and inoculate an API 20E strip, add reagents, read biochemical reactions, calculate the profile number, and interpret organism identification.","Acharya Tankeshwar","2015-05-06","2026-08-22","biochemical-tests",[78,81,84,87,90,93,96],{"question":79,"answer":80},"How many tests are in the API 20E, 20 or 21?","The strip has 20 wells, but a complete identification uses 21 reactions. The oxidase test is performed separately, off the strip, and fills the last position in the profile code.",{"question":82,"answer":83},"Which API 20E wells need a mineral oil overlay?","Five: ADH, LDC, ODC, URE, and H₂S. The oil creates the anaerobic conditions these reactions need. Without it, they read falsely.",{"question":85,"answer":86},"Which wells need reagents added after incubation?","Three: TDA (ferric chloride), IND (Kovács' reagent), and VP (KOH followed by α-naphthol). Add these only after reading every self-developing well.",{"question":88,"answer":89},"Why does the VP well take longer to read?","The pink-red color from acetoin detection can take up to 10 minutes to develop. Do not call VP negative before then. TDA and IND, by contrast, are read almost immediately.",{"question":91,"answer":92},"How is the 7-digit profile number generated?","The 21 reactions are grouped into seven triplets. Within each triplet the wells score 1, 2, and 4 from top to bottom; you add up only the positives, giving a digit from 0 to 7. The seven digits form the profile, which you look up in apiweb or the API catalog.",{"question":94,"answer":95},"What do I do if the profile gives a doubtful or low-confidence identification?","apiweb reports a %ID and a T-value; a low or non-discriminating result means you need supplementary tests (such as oxidase, nitrate reduction, or motility) or a repeat run, rather than accepting the closest match.",{"question":97,"answer":98},"Can API 20E identify organisms other than Enterobacteriaceae?","It is designed for Enterobacteriaceae and other non-fastidious Gram-negative rods. It is not suitable for fastidious organisms or non-fermenters outside its database scope, which need different panels.",[100,101,102],"carbohydrate-utilization","enzyme-tests","substrate-utilization",{"slug":104,"title":105,"description":106,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":107,"lastUpdatedDate":108,"draft":45,"category":109,"image":42,"faq":110,"tags":129},"maldi-tof-ms-principle-applications-microbiology","MALDI-TOF Mass Spectrometry: How It Identifies an Organism in Minutes","How MALDI-TOF identifies bacteria and fungi in minutes: the role of the matrix, why time of flight measures protein mass, and why the protein fingerprint is species-specific. Plus its clinical uses and limits.","2018-12-07","2026-07-30","lab-equipment",[111,114,117,120,123,126],{"question":112,"answer":113},"\u003Cp>How does MALDI-TOF identify a microorganism?\u003C\u002Fp>","\u003Cp>It measures the masses of the organism's most abundant proteins, mainly ribosomal proteins, to produce a mass spectral fingerprint. Because these proteins are conserved within a species but differ between species, the fingerprint acts as a species signature, which the instrument matches against a reference database to report an identification.\u003C\u002Fp>",{"question":115,"answer":116},"\u003Cp>What is the role of the matrix in MALDI-TOF?\u003C\u002Fp>","\u003Cp>The matrix is a small organic compound mixed with the sample that absorbs the laser energy and transfers a controlled amount to the proteins. This lifts the large protein molecules into the gas phase intact and gives them a charge, instead of shattering them. Without the matrix, the proteins could not be measured.\u003C\u002Fp>",{"question":118,"answer":119},"\u003Cp>Why is it called time of flight?\u003C\u002Fp>","\u003Cp>Charged protein ions are given an identical push by an electric field and then timed as they travel down a vacuum tube to a detector. Lighter ions travel faster and arrive sooner, heavier ions arrive later, so the flight time corresponds directly to the ion's mass.\u003C\u002Fp>",{"question":121,"answer":122},"\u003Cp>How fast is MALDI-TOF compared to traditional identification?\u003C\u002Fp>","\u003Cp>MALDI-TOF identifies an organism from a colony in minutes, compared with the overnight incubation that biochemical test panels require. It does still usually need an isolated colony, so it speeds up identification rather than the culture step before it.\u003C\u002Fp>",{"question":124,"answer":125},"\u003Cp>Does MALDI-TOF tell you which antibiotics to use?\u003C\u002Fp>","\u003Cp>No. MALDI-TOF identifies the organism but provides no antimicrobial susceptibility information. A separate susceptibility test is still needed to determine which antibiotics will be effective.\u003C\u002Fp>",{"question":127,"answer":128},"\u003Cp>Why can't MALDI-TOF tell some organisms apart?\u003C\u002Fp>","\u003Cp>Organisms with nearly identical ribosomal proteins produce nearly identical fingerprints. For example, \u003Cem>Shigella\u003C\u002Fem> cannot be reliably distinguished from \u003Cem>Escherichia coli\u003C\u002Fem>, and \u003Cem>Streptococcus pneumoniae\u003C\u002Fem> can be hard to separate from other viridans streptococci, because they are too similar at the protein level.\u003C\u002Fp>",[],{"slug":131,"title":132,"description":133,"seoTitle":42,"seoDescription":42,"author":73,"createdDate":134,"lastUpdatedDate":135,"draft":45,"category":46,"image":42,"faq":136,"tags":155},"minimum-inhibitory-concentration-mic-broth-dilution-method-procedure-interpretation","Broth Dilution Method for MIC: Macrodilution vs Microdilution, Procedure & Troubleshooting","Step-by-step broth macrodilution and microdilution procedure for MIC determination: antibiotic stock prep, 0.5 McFarland standardization, reading results, and a troubleshooting guide for the errors that actually happen at the bench.","2013-11-15","2026-08-24",[137,140,143,146,149,152],{"question":138,"answer":139},"What's the difference between broth macrodilution and microdilution?","\u003Cp>They follow the same principle (serial antibiotic dilutions inoculated with a standardized bacterial suspension) but macrodilution uses 1 mL per tube while microdilution uses 0.05–0.1 mL per well in a 96-well tray. Microdilution is far more common in routine clinical labs.\u003C\u002Fp>",{"question":141,"answer":142},"Why must the inoculum be standardized to a 0.5 McFarland standard?","The MIC result depends directly on how many bacteria you start with. Too light an inoculum reads a falsely low MIC; too heavy reads a falsely high one. The 0.5 McFarland standard ensures every test starts from a comparable, known bacterial density.",{"question":144,"answer":145},"Why are reference strains like E. coli ATCC 25922 run alongside patient isolates?","\u003Cp>They're quality-control checks. If a known reference strain's MIC falls outside its established CLSI range, it signals a problem with the test itself (inoculum, media, or technique) before patient results are trusted.\u003C\u002Fp>",{"question":147,"answer":148},"What happens if microdilution trays are stacked too high during incubation?","\u003Cp>Cultures at the center of a tall stack can incubate at a different temperature than intended, skewing growth and MIC readings, CLSI guidance caps stacking at four trays high.\u003C\u002Fp>",{"question":150,"answer":151},"Can broth dilution MIC testing be automated?","\u003Cp>Yes. Systems like Vitek 2, MicroScan Walkaway, and BD Phoenix automate broth microdilution and reading, and are widely used in clinical labs alongside or instead of manual testing.\u003C\u002Fp>",{"question":153,"answer":154},"Why might an MIC come back lower than clinically expected even with correct technique?","A few possibilities: the inoculum was too light, the cation-adjusted Mueller-Hinton broth's pH or calcium concentration is off, or there's a transcription\u002Freading error.",[65],{"slug":157,"title":158,"description":159,"seoTitle":42,"seoDescription":42,"author":73,"createdDate":160,"lastUpdatedDate":161,"draft":45,"category":46,"image":42,"faq":162,"tags":181},"minimum-inhibitory-concentration-and-minimum-bactericidal-concentration-mbc","MIC vs MBC: What Each Measures and When the Difference Actually Matters","MIC stops bacterial growth; MBC kills it. Learn how MBC is determined from MIC tubes, the MBC\u002FMIC ratio, and the specific clinical scenarios (endocarditis, osteomyelitis, neutropenic sepsis) where the distinction changes treatment.","2020-03-30","2026-08-21",[163,166,169,172,175,178],{"question":164,"answer":165},"What is the difference between MIC and MBC?","MIC is the lowest antibiotic concentration that stops visible bacterial growth. MBC is the lowest concentration that kills ≥99.9% of the original bacterial population. MIC is a bacteriostatic endpoint; MBC is a bactericidal one.",{"question":167,"answer":168},"Is a lower MIC always better?","A lower MIC means the organism is more susceptible to that drug, but MIC alone doesn't predict cure — achievable drug concentration at the infection site and host immune status matter too.",{"question":170,"answer":171},"Why isn't MBC tested routinely in clinical labs?","Most infections are cleared by a combination of drug activity and host immune defenses, so a bacteriostatic effect (measured by MIC) is sufficient. MBC adds labor and turnaround time that's only justified in specific high-stakes infections.",{"question":173,"answer":174},"What does an MBC\u002FMIC ratio greater than 4 mean?","It indicates the drug is acting bacteriostatically rather than bactericidally against that specific organism.",{"question":176,"answer":177},"Can the same antibiotic be bactericidal against one organism and bacteriostatic against another?","Yes — bactericidal vs. bacteriostatic activity depends on the drug-organism combination, not the drug alone, which is exactly why MBC is tested rather than assumed from drug class.",{"question":179,"answer":180},"How is MBC determined from the MIC test?","A small volume from each clear (no-growth) MIC tube is subcultured onto antibiotic-free agar. The MBC is the lowest concentration whose subculture yields fewer than 0.1% of the original inoculum, equivalent to 99.9% killing.",[65],{"slug":183,"title":184,"description":185,"seoTitle":42,"seoDescription":42,"author":73,"createdDate":186,"lastUpdatedDate":135,"draft":45,"category":46,"image":42,"faq":187,"tags":206},"lists-bacterial-pathogens-intrinsic-antibiotic-resistance","Intrinsic Antibiotic Resistance: Meaning, Mechanism, and Examples","\u003Cp>What intrinsic (natural) antibiotic resistance means, how it works (impermeability, efflux, missing targets), and key examples like\u003Cem> Pseudomonas and Proteus.\u003C\u002Fem>\u003C\u002Fp>","2017-05-14",[188,191,194,197,200,203],{"question":189,"answer":190},"\u003Cp>What is intrinsic antibiotic resistance?\u003C\u002Fp>","\u003Cp>It is natural resistance built into a bacterial species by its genetics, structure, or physiology. It is chromosomal, inherited by all members of the species, and present whether or not the bacterium has ever been exposed to the drug.\u003C\u002Fp>",{"question":192,"answer":193},"\u003Cp>What is the difference between intrinsic and acquired resistance?\u003C\u002Fp>","\u003Cp>Intrinsic resistance is a natural, fixed property of a whole species (the drug never worked). Acquired resistance is gained by a previously susceptible strain through mutation or gene transfer, and only acquired resistance spreads.\u003C\u002Fp>",{"question":195,"answer":196},"\u003Cp>Is intrinsic resistance the same as inherent or natural resistance?\u003C\u002Fp>","\u003Cp>Yes. Intrinsic, inherent, and natural resistance all refer to the same thing.\u003C\u002Fp>",{"question":198,"answer":199},"\u003Cp>What are the mechanisms of intrinsic resistance?\u003C\u002Fp>","\u003Cp>The drug has no target, the drug cannot enter the cell (impermeability), the drug is pumped out by efflux, or the drug is inactivated (or cannot be activated) by the bacterium.\u003C\u002Fp>",{"question":201,"answer":202},"\u003Cp>Give an example of intrinsic resistance.\u003C\u002Fp>","\u003Cp>\u003Cem>Mycoplasma\u003C\u002Fem> is intrinsically resistant to penicillin because it has no cell wall for the drug to attack, and gram-negative bacteria are intrinsically resistant to vancomycin because it cannot cross their outer membrane.\u003C\u002Fp>",{"question":204,"answer":205},"\u003Cp>Which antibiotics are gram-positive bacteria intrinsically resistant to?\u003C\u002Fp>","\u003Cp>Aztreonam, polymyxin B and colistin, and nalidixic acid.\u003C\u002Fp>",[207],"antimicrobials-moa-amr",{"slug":209,"title":210,"description":211,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":212,"lastUpdatedDate":213,"draft":45,"category":46,"image":42,"faq":214,"tags":227},"betalactamase-classification","Beta-Lactamase Classification: Ambler vs. Bush-Jacoby, and Why an Enzyme Has Both","How the Ambler molecular classes (A through D) and Bush-Jacoby functional groups describe the same enzymes from two different angles, with the mapping most articles skip.","2021-05-26","2026-08-25",[215,218,221,224],{"question":216,"answer":217},"Are the Ambler and Bush-Jacoby-Medeiros classification systems different enzymes or different views of the same ones?","They are two different views of the same enzymes. Ambler classifies by molecular structure, while Bush-Jacoby-Medeiros classifies by function, substrate and inhibitor profile. A single enzyme carries a label in both systems at once, for example AmpC is simultaneously Ambler Class C and Bush-Jacoby Group 1.",{"question":219,"answer":220},"Why doesn't clavulanic acid inhibit Ambler Class B enzymes?","Class B enzymes are metallo-beta-lactamases that require a zinc ion at the active site rather than serine. Clavulanic acid works against the serine-based classes (A, C, D) but has no effect on the zinc-dependent mechanism, which instead requires metal chelators like EDTA.",{"question":222,"answer":223},"\u003Cp>How many groups are in the Bush-Jacoby classification?\u003C\u002Fp>","\u003Cp>Three main functional groups with multiple subgroups. A fourth group originally existed but was merged because its enzyme properties overlapped with the other three.\u003C\u002Fp>",{"question":225,"answer":226},"\u003Cp>Which Ambler class contains the AmpC enzymes?\u003C\u002Fp>","\u003Cp>Ambler Class C, which corresponds to Bush-Jacoby Group 1, the cephalosporinases.\u003C\u002Fp>",[65],{"slug":229,"title":230,"description":231,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":232,"lastUpdatedDate":233,"draft":45,"category":46,"image":42,"faq":234,"tags":253},"ampc-beta-lactamase-detection","AmpC Beta-Lactamase Detection: Cefoxitin Screen, Inhibitor Confirmation, and Telling It Apart from an ESBL","How the lab detects an AmpC beta-lactamase: the cefoxitin screen, the cloxacillin and boronic acid confirmatory tests, chromosomal versus plasmid-mediated AmpC, and the inhibitor logic that separates AmpC from an ESBL.","2026-08-02","2026-08-05",[235,238,241,244,247,250],{"question":236,"answer":237},"\u003Cp>How is an AmpC beta-lactamase detected in the lab?\u003C\u002Fp>","\u003Cp>Detection begins with a cefoxitin screen: a cefoxitin zone under 18 mm is suspicious. Confirmation uses an AmpC inhibitor, either a cefoxitin-cloxacillin double-disk test (≥4 mm zone increase with cloxacillin) or a boronic acid disk test (≥5 mm increase with boronic acid). The AmpC disk test using Tris-EDTA is an alternative.\u003C\u002Fp>",{"question":239,"answer":240},"\u003Cp>How do you tell an AmpC apart from an ESBL?\u003C\u002Fp>","\u003Cp>By which inhibitor restores the cephalosporin. AmpC is inhibited by boronic acid and cloxacillin but not by clavulanic acid; an ESBL is the reverse. AmpC also hydrolyzes cefoxitin, whereas an ESBL spares it, so cefoxitin resistance points toward AmpC.\u003C\u002Fp>",{"question":242,"answer":243},"\u003Cp>Why is clavulanic acid not useful for detecting AmpC?\u003C\u002Fp>","\u003Cp>Clavulanic acid inhibits the serine ESBLs but does not inhibit AmpC enzymes. That is why the standard ESBL confirmatory test, which relies on clavulanate synergy, cannot detect an AmpC and can even be masked by one.\u003C\u002Fp>",{"question":245,"answer":246},"\u003Cp>What is the difference between chromosomal and plasmid-mediated AmpC?\u003C\u002Fp>","\u003Cp>Chromosomal AmpC is native to organisms such as \u003Cem>Enterobacter\u003C\u002Fem>, \u003Cem>Citrobacter\u003C\u002Fem>, and \u003Cem>Serratia\u003C\u002Fem>, where it is often inducible. Plasmid-mediated AmpC is acquired and appears in species that normally lack a chromosomal ampC, such as \u003Cem>E. coli\u003C\u002Fem>, \u003Cem>Klebsiella pneumoniae\u003C\u002Fem>, and \u003Cem>Proteus mirabilis\u003C\u002Fem>, where its presence signals a transferable enzyme.\u003C\u002Fp>",{"question":248,"answer":249},"\u003Cp>Why can an AmpC producer fail treatment despite a susceptible cephalosporin result?\u003C\u002Fp>","\u003Cp>Many AmpC enzymes are inducible. Baseline production is low, so the isolate can appear susceptible, but exposure to a beta-lactam increases enzyme production and unmasks resistance during therapy. Cefepime or a carbapenem is preferred for confirmed AmpC producers.\u003C\u002Fp>",{"question":251,"answer":252},"\u003Cp>Can an isolate produce both AmpC and ESBL?\u003C\u002Fp>","\u003Cp>Yes. When both are present, the AmpC masks the ESBL because clavulanic acid cannot restore the cephalosporin while the AmpC continues to hydrolyze it. Testing on cloxacillin-containing media or adding boronic acid neutralizes the AmpC and reveals the hidden ESBL.\u003C\u002Fp>",[65],{"slug":255,"title":256,"description":256,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":257,"lastUpdatedDate":258,"draft":45,"category":46,"image":42,"faq":259,"tags":260},"phenotypic-methods-for-the-detection-of-carbapenemases","Phenotypic Methods for the Detection of Carbapenemases","2021-05-10","2026-07-05",[],[65],{"enabled":262,"threads":263,"total":264},true,[],0,[266,272,279,286,292,297,303,308,314,317,323],{"slug":267,"name":73,"description":268,"image":269,"body":270,"postCount":271},"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.*",491,{"slug":273,"name":274,"description":275,"image":276,"body":277,"postCount":278},"ashma-shrestha","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.",79,{"slug":280,"name":281,"description":282,"image":283,"body":284,"postCount":285},"sushmita-baniya","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":287,"name":288,"description":282,"image":289,"body":290,"postCount":291},"samikshya-acharya","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":293,"name":294,"description":282,"image":42,"body":295,"postCount":296},"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":298,"name":299,"description":300,"image":42,"body":301,"postCount":302},"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":304,"name":305,"description":306,"image":42,"body":42,"postCount":307},"guest-author","Guest Author","Guest Author \u002F Contributor",1,{"slug":309,"name":310,"description":282,"image":311,"body":312,"postCount":313},"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.",15,{"slug":315,"name":316,"description":306,"image":42,"body":42,"postCount":307},"dr-poonam-acharya","Dr. Poonam Acharya",{"slug":318,"name":43,"description":319,"image":320,"body":321,"postCount":322},"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.*",55,{"slug":324,"name":325,"description":326,"image":327,"body":328,"postCount":307},"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.",[330,337,343,348,353,358,362,366,370,375,379,383,386,391,396,401,405,409,414,419,423,427,431,435,439,443,447,451,456,461,465,469,473,478,482,486,490,494,498,502,506,510,514,518,522,526,530,534,539,543,547,551,555,559,562,565,569,573,576,580,584,588,592,596,600,604,608,612,615,619,622,625,628,631,634,637,640,643,646,649,652,655,658],{"slug":331,"name":332,"description":333,"image":334,"body":335,"postCount":336},"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":338,"name":339,"description":340,"image":42,"body":341,"postCount":342},"microscopy","Microscopy","Microscope types, components, and microscopy techniques","These are list of blog posts related to microscopy. ",12,{"slug":344,"name":345,"description":346,"image":42,"body":42,"postCount":347},"gram-positive-cocci","Gram-Positive Cocci","Staphylococcus, Streptococcus, Enterococcus, Micrococcus — organisms, diseases, and identification tests",11,{"slug":349,"name":350,"description":351,"image":42,"body":42,"postCount":352},"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":354,"name":355,"description":356,"image":42,"body":42,"postCount":357},"gram-positive-rods","Gram-Positive Rods","Bacillus, Clostridium, Listeria, Corynebacterium, Actinomyces and related organisms",8,{"slug":359,"name":360,"description":361,"image":42,"body":42,"postCount":342},"mycobacteria","Mycobacteria","Mycobacterium tuberculosis, leprosy, atypical mycobacteria, and acid-fast organism diagnosis",{"slug":363,"name":364,"description":365,"image":42,"body":42,"postCount":342},"anaerobic-bacteriology","Anaerobic Bacteriology","Anaerobic organisms, anaerobic culture methods, and anaerobic infection diagnosis",{"slug":367,"name":368,"description":369,"image":42,"body":42,"postCount":342},"enterobacteriaceae","Enterobacteriaceae","Identification, differentiation, and clinical significance of Enterobacteriaceae family members",{"slug":371,"name":372,"description":373,"image":42,"body":42,"postCount":374},"spirochetes","Spirochetes","Treponema, Leptospira, Borrelia and spirochetal infections",7,{"slug":376,"name":377,"description":378,"image":42,"body":42,"postCount":336},"food-microbiology","Food Microbiology","Food-borne pathogens, food safety, spoilage, and preservation",{"slug":65,"name":380,"description":381,"image":42,"body":42,"postCount":382},"Antimicrobial Susceptibility Testing","Methods for testing antibiotic susceptibility in clinical microbiology",22,{"slug":207,"name":384,"description":385,"image":42,"body":42,"postCount":336},"Antimicrobials (MOA & AMR)","Mechanisms, detection, and clinical significance of antimicrobial resistance",{"slug":387,"name":388,"description":389,"image":42,"body":42,"postCount":390},"sterilization-disinfection","Sterilization and Disinfection","Methods of sterilization and disinfection in healthcare and laboratory settings",10,{"slug":392,"name":393,"description":394,"image":42,"body":42,"postCount":395},"specimen-collection-transport","Specimen Collection and Transport","Collection, handling, and transport of clinical specimens for microbiological testing",27,{"slug":397,"name":398,"description":399,"image":42,"body":42,"postCount":400},"bacterial-structure-physiology","Bacterial Structure and Physiology","Bacterial cell structure, growth, physiology, and environmental factors affecting growth",21,{"slug":402,"name":403,"description":42,"image":42,"body":404,"postCount":296},"horizontal-gene-transfer","Horizontal Gene Transfer","Articles related to **Horizontal Gene Transfer**",{"slug":406,"name":407,"description":42,"image":42,"body":408,"postCount":390},"chromatography","Chromatography","Information about chromatographic techniques.",{"slug":410,"name":411,"description":412,"image":42,"body":413,"postCount":374},"electrophoresis","Electrophoresis","Information about Electrophoresis Techniques ","Detailed information  about Electrophoresis Techniques ",{"slug":415,"name":416,"description":417,"image":42,"body":418,"postCount":296},"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":420,"name":421,"description":422,"image":42,"body":42,"postCount":296},"bacteriophage","Bacteriophage","Description about Bacteriophage.",{"slug":424,"name":425,"description":426,"image":42,"body":42,"postCount":296},"malaria","Malaria","It is the collections of articles regarding malarial disease. ",{"slug":428,"name":429,"description":430,"image":42,"body":42,"postCount":296},"anaerobic-culture-techniques","Anaerobic Culture Techniques","Posts related with Anaerobic Culture Techniques.",{"slug":432,"name":433,"description":434,"image":42,"body":42,"postCount":400},"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.",{"slug":436,"name":437,"description":438,"image":42,"body":42,"postCount":374},"biosafety-levels","Biosafety levels ","Articles related to Biosafety Levels",{"slug":440,"name":441,"description":442,"image":42,"body":42,"postCount":352},"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":444,"name":445,"description":446,"image":42,"body":42,"postCount":296},"pipette","Pipette","Posts related with Pipette. ",{"slug":448,"name":449,"description":450,"image":42,"body":42,"postCount":374},"bacteriology-mcqs","Bacteriology MCQs","This sections lists MCQs in Bacteriology.",{"slug":452,"name":453,"description":454,"image":42,"body":42,"postCount":455},"parasitology-mcqs","Parasitology MCQs","This section lists MCQs in Parasitology.",2,{"slug":457,"name":458,"description":459,"image":42,"body":42,"postCount":460},"virology-mcqs","Virology MCQs","This is the collections of Multiple Choice Questions in Virology.",4,{"slug":462,"name":463,"description":464,"image":42,"body":42,"postCount":352},"mcqs-in-microbiology","MCQs in Microbiology","This section lists the collections of Multiple Choice Questions in General Microbiology Topics. ",{"slug":466,"name":467,"description":468,"image":42,"body":42,"postCount":374},"immunology-mcqs","Immunology MCQs","In this section; we are posting collections of Multiple Choice Questions about Immunology. ",{"slug":470,"name":471,"description":472,"image":42,"body":42,"postCount":390},"microbial-curiosities","Microbial Curiosities","In this clusters, we are posting interesting and unique information about Microorganisms. ",{"slug":474,"name":475,"description":476,"image":42,"body":42,"postCount":477},"bacterial-culture-media","Bacterial Culture Media","Posts related to Bacterial Culture Media. ",23,{"slug":479,"name":480,"description":481,"image":42,"body":42,"postCount":296},"fungal-culture-media","Fungal Culture Media","Posts related to Fungal Culture Media.",{"slug":483,"name":484,"description":485,"image":42,"body":42,"postCount":352},"motility-test","Motility Test","This lists the procedure regarding various tests methods for bacterial motility.",{"slug":487,"name":488,"description":489,"image":42,"body":42,"postCount":390},"bacterial-enumeration","Bacterial enumeration","These posts are related to isolation and enumeration of bacteria. ",{"slug":491,"name":492,"description":493,"image":42,"body":42,"postCount":455},"gram-positive-coccobacillus","Gram-positive coccobacillus","List of Gram Positive Coccobacilli",{"slug":495,"name":496,"description":497,"image":42,"body":42,"postCount":460},"dimorphic-fungi","Dimorphic Fungi","This is about various dimorphic fungi. ",{"slug":499,"name":500,"description":501,"image":42,"body":42,"postCount":374},"bacterial-classification","Bacterial Classification","These posts are related with various approaches used for the classification of Bacteria. ",{"slug":503,"name":504,"description":505,"image":42,"body":42,"postCount":352},"immunofluorescence","Immunofluorescence ","Various Tests related to Immunofluorescence ",{"slug":507,"name":508,"description":509,"image":42,"body":42,"postCount":302},"antibody-mediated-immunity","Antibody-mediated Immunity","This clusters links the articles that are sharing insights about Antibody-mediated immunity. ",{"slug":511,"name":512,"description":513,"image":42,"body":42,"postCount":374},"hypersensitivity","Hypersensitivity","Articles related to Hypersensitivity.",{"slug":515,"name":516,"description":42,"image":42,"body":42,"postCount":517},"haemophilus","Haemophilus",3,{"slug":519,"name":520,"description":521,"image":42,"body":42,"postCount":460},"sexually-transmitted-infections-stis","Sexually transmitted infections (STIs)","This is the clusters of infections that are transmitted sexually. ",{"slug":523,"name":524,"description":525,"image":42,"body":42,"postCount":342},"adaptive-immunity","Adaptive Immunity","Blog posts related to B Cell Immunity and T Cell Immunity.",{"slug":527,"name":528,"description":529,"image":42,"body":42,"postCount":336},"fungal-diagnostics","Fungal Diagnostics","Various methods used for the Diagnosis of Fungal Infections. ",{"slug":531,"name":532,"description":533,"image":42,"body":42,"postCount":352},"laboratory-storage-and-preservation","Laboratory Storage and Preservation","Articles about Laboratory Storage of Antimicrobial Disk, Test organisms and Equipment used for this process. ",{"slug":535,"name":536,"description":537,"image":42,"body":538,"postCount":296},"laboratory-heating-equipment","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":540,"name":541,"description":542,"image":42,"body":42,"postCount":302},"laboratory-glassware","Laboratory Glassware","Posts about Laboratory Glassware. ",{"slug":544,"name":545,"description":546,"image":42,"body":42,"postCount":302},"helminths","Helminths","In this section, we are covering properties, life cycle, pathogenesis and laboratory diagnosis of Helminths\u002FHelminthic infestations. ",{"slug":548,"name":549,"description":550,"image":42,"body":42,"postCount":357},"protozoan-parasite","Protozoan Parasite","In this cluster, we are covering protozoan parasites. ",{"slug":552,"name":553,"description":554,"image":42,"body":42,"postCount":307},"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":556,"name":557,"description":558,"image":42,"body":42,"postCount":390},"bacterial-staining-technique","Bacterial Staining Technique","Lists of various staining techniques that are used to stain bacteria. ",{"slug":101,"name":560,"description":561,"image":42,"body":42,"postCount":400},"Enzyme Tests","\u003Cp>Various Biochemical Test that are based on enzymatic activity of the microorganisms. \u003C\u002Fp>",{"slug":100,"name":563,"description":564,"image":42,"body":42,"postCount":347},"Carbohydrate Utilization","\u003Cp>Various biochemical tests which are related to Carbohydrate fermentation or Utilization\u003C\u002Fp>",{"slug":566,"name":567,"description":568,"image":42,"body":42,"postCount":352},"susceptibility-based-id","Susceptibility-based ID","\u003Cp>These are susceptibility based identification test such as optochin sensitivity, bacitracin sensitivity etc. \u003C\u002Fp>",{"slug":570,"name":571,"description":572,"image":42,"body":42,"postCount":460},"microbial-metabolism","Microbial Metabolism","\u003Cp>Tests about Microbial Metabolism. \u003C\u002Fp>",{"slug":102,"name":574,"description":575,"image":42,"body":42,"postCount":357},"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":577,"name":578,"description":579,"image":42,"body":42,"postCount":517},"atypical-pneumonia","Atypical Pneumonia","\u003Cp>Organisms responsible for Atypical Pneumonia. \u003C\u002Fp>",{"slug":581,"name":582,"description":583,"image":42,"body":42,"postCount":352},"antigen","Antigen","\u003Cp>Various articles related to Antigens.\u003C\u002Fp>",{"slug":585,"name":586,"description":587,"image":42,"body":42,"postCount":374},"innate-immunity","Innate Immunity","\u003Cp>Articles related to Innate Immunity. \u003C\u002Fp>",{"slug":589,"name":590,"description":591,"image":42,"body":42,"postCount":460},"respiratory-tract-infection","Respiratory Tract Infection","\u003Cp>In this cluster, you can see various etiological agents that causes respiratory tract infection. \u003C\u002Fp>",{"slug":593,"name":594,"description":595,"image":42,"body":42,"postCount":352},"torch-infection","TORCH Infection","\u003Cp>In this section; you can find articles related with TOCH infection. \u003C\u002Fp>",{"slug":597,"name":598,"description":599,"image":42,"body":42,"postCount":357},"microbiology-for-beginners","Microbiology for Beginners","\u003Cp>These articles are very basic articles, which will share general concepts in Microbiology. \u003C\u002Fp>",{"slug":601,"name":602,"description":603,"image":42,"body":42,"postCount":296},"dna-replication","DNA Replication","\u003Cp>Articles related to DNA and Replication of DNA. \u003C\u002Fp>",{"slug":605,"name":606,"description":607,"image":42,"body":42,"postCount":374},"genetic-code","Genetic Code","\u003Cp>Articles related to Genetic Code.\u003C\u002Fp>",{"slug":609,"name":610,"description":611,"image":42,"body":42,"postCount":374},"molecular-technique","Molecular Technique","\u003Cp>Posts related to Molecular Techniques. \u003C\u002Fp>",{"slug":613,"name":614,"description":42,"image":42,"body":42,"postCount":307},"colorimetric-assay","Colorimetric Assay ",{"slug":616,"name":617,"description":618,"image":42,"body":42,"postCount":352},"pharmaceutical-microbiology","Pharmaceutical Microbiology","\u003Cp>Various articles related to Pharmaceutical Microbiology\u003C\u002Fp>",{"slug":620,"name":621,"description":42,"image":42,"body":42,"postCount":517},"blood-and-immune-cells","Blood and Immune Cells",{"slug":623,"name":624,"description":42,"image":42,"body":42,"postCount":352},"host-pathogen-interaction","Host Pathogen Interaction",{"slug":626,"name":627,"description":42,"image":42,"body":42,"postCount":460},"blood-culture","Blood Culture",{"slug":629,"name":630,"description":42,"image":42,"body":42,"postCount":460},"environmental-microbiology","Environmental microbiology ",{"slug":632,"name":633,"description":42,"image":42,"body":42,"postCount":374},"copromicroscopic-technique","Copromicroscopic Technique",{"slug":635,"name":636,"description":42,"image":42,"body":42,"postCount":517},"quality-control","Quality Control",{"slug":638,"name":639,"description":42,"image":42,"body":42,"postCount":374},"dermatophytes","Dermatophytes",{"slug":641,"name":642,"description":42,"image":42,"body":42,"postCount":517},"viral-hemorrhagic-fevers","Viral Hemorrhagic Fevers",{"slug":644,"name":645,"description":42,"image":42,"body":42,"postCount":460},"h2s-production","H2S Production",{"slug":647,"name":648,"description":42,"image":42,"body":42,"postCount":455},"water-quality-testing","Water Quality Testing",{"slug":650,"name":651,"description":42,"image":42,"body":42,"postCount":352},"virology-basics","Virology basics",{"slug":653,"name":654,"description":42,"image":42,"body":42,"postCount":460},"typing-methods","Typing Methods",{"slug":656,"name":657,"description":42,"image":42,"body":42,"postCount":517},"blotting-technique","Blotting Technique",{"slug":659,"name":660,"description":42,"image":42,"body":42,"postCount":460},"history-microbiology","History of Microbiology"]