[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fxLN3MUwXCdr5RPjwZYIDpOj8CHyjOmngWTgoKXPtZbg":3,"$fe1YJVk3YFgaSSJUzhrhdO6iLa7zYrHm3BDUXFB2HfFY":36,"$f3Ft0rKFJHppdzE-vuveecxx1BUcg9iOlMLtyzf_MJDg":185,"$fucxFBm2ZjZfGSdmdRaSNGBI_F0jJme4f0GTvzUhQfL8":249},[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":65,"related":67,"comments":181},"notable-dimorphic-fungi-and-their-properties","Dimorphic Fungi: Disease, Properties","\u003Cp>Dimorphic fungi: \u003Cem>Histoplasma, Blastomyces, Coccidioides, Paracoccidioides, Sporothrix, Talaromyces\u003C\u002Fem>. Mold-to-yeast conversion, mnemonics, geographic distribution, and clinical findings. Complete teaching guide.\u003C\u002Fp>",null,"Acharya Tankeshwar","2013-05-29","2026-08-17",false,"mycology","Fungi can be broadly classified into two groups;  **yeasts and molds**. Yeasts are single-celled organisms that reproduce by budding, but molds grow as filament-like structures and reproduce primarily using asexual reproductive spores such as conidiospores, sporangiospores, and arthrospores.\n\n## Properties\n\nDimorphic fungi exist as molds in the environment at ambient temperature (25°C– 30°C) and as yeasts (or other structures, e.g., spherules in case of *Coccidioides immitis*) in human tissues at body temperature (35°C -37°C). Many medically important fungi show this unique behavior based on the temperature of growth and habitat.\n\n> Mnemonic: Mold in the Cold, Yeast in the Heat (Beast)\n\n### Why thermal dimorphism matters\n\nWhy would a fungus bother changing its entire morphology based on temperature? The answer reveals the core survival strategy of these organisms, and understanding it makes the whole topic click into place:\n\n**In the environment (25–30°C):** these fungi grow as molds, producing abundant spores (conidia) that are lightweight and easily aerosolized, ideal for environmental dispersal and finding new soil\u002Forganic matter to colonize.\n\n**Inside the human body (35–37°C):** the same fungus converts to yeast form. Yeast cells are smaller, can survive and even replicate inside macrophages, and are far better suited to surviving the host immune response than the mold form would be. The conversion is therefore not incidental; it is a deliberate **virulence switch**. A fungus that failed to convert to yeast form inside the host would be cleared far more easily by phagocytes.\n\n**This explains a critical laboratory safety point:** the **mold form is the infectious form** for laboratory personnel. Inhaling aerosolized conidia from a culture plate is how laboratory-acquired infections occur. This is precisely why all suspected dimorphic fungal cultures must be handled in a biological safety cabinet, and why many reference laboratories restrict culture of these organisms to specialized BSL-3 facilities once dimorphic fungal infection is suspected.\n\nMost dimorphic fungi cause **systemic mycoses** and *Sporothrix* (one of the dimorphic fungi) causes subcutaneous mycoses.\n\n**Note:** All molds should be handled within appropriate [biological safety cabinets](\u002Fbiological-safety-cabinet-bsc-types-working-mechanism\u002F) to avoid a laboratory-acquired infection.\n\n![ - Sporothrix schenckiigives mold colonies at environmental temperature and yeast-like colonies are 37°C(Imagesource)](\u002Fblogs\u002FThermal-Dimorphism-in-Sporothrix.jpg)Figure: *Sporothrix schenckii* gives mold colonies at environmental temperature and yeast-like colonies are 37°C\n\n## Disease caused by Dimorphic Fungi\n\n| **Name of dimorphic fungi** | **Disease** | **Important clinical findings** |\n| --- | --- | --- |\n| *Histoplasma capsulatum* | Histoplasmosis | Cavitary lung lesions, granulomas in liver and spleen |\n| *Blastomyces dermatitidis* | Blastomycosis | Ulcerated lesions of the skin |\n| *Paracoccidioides brasiliensis* | Paracoccidioidomycosis | Ulcerated lesions of the face and mouth |\n| *Coccidioides immitis* | Coccidioidomycosis | Valley fever in immunocompetent; dissemination to meninges in immunocompromised |\n| *Sporothrix schenckii* | Sporotrichosis is “rose gardener’s disease.” | Local abscess or ulcer with nodules in draining lymphatics |\n| *Talaromyces marneffei* | Talaromycosis | Tuberculosis-like disease in AIDS patients |\n\n## Geographic Distribution\n\nUnlike most bacterial pathogens, dimorphic fungi have highly specific geographic endemicity. A travel and residence history is often the single most useful diagnostic clue when dimorphic fungal infection is suspected:\n\n| Organism | Endemic region | Environmental association |\n| --- | --- | --- |\n| *Histoplasma capsulatum* | Ohio and Mississippi River valleys (USA), parts of Latin America, Africa, Asia | Bird and bat droppings (caves, chicken coops) |\n| *Blastomyces dermatitidis* | Ohio\u002FMississippi River valleys, Great Lakes region (USA), Canada | Moist soil rich in decaying wood\u002Forganic debris |\n| *Coccidioides immitis\u002Fposadasii* | Southwestern USA, Mexico, Central\u002FSouth America (\"Valley Fever\" belt) | Arid\u002Fsemi-arid desert soil |\n| *Paracoccidioides brasiliensis* | Rural Latin America (Brazil especially) | Soil, associated with farming\u002Fagriculture |\n| *Sporothrix schenckii* | Worldwide, but classically reported in gardeners\u002Ffarmers | Living\u002Fdecaying vegetation, rose thorns |\n| *Talaromyces marneffei* | Southeast Asia (Thailand, Vietnam, southern China, Hong Kong) | Bamboo rats; soil |\n\n**The clinical pattern this creates:** a patient presenting with a cavitary lung lesion who has recently travelled to or lived in Arizona should raise suspicion for coccidioidomycosis; the same presentation in someone from the Ohio River valley raises suspicion for histoplasmosis. Geography genuinely changes the differential diagnosis.\n\n## Examples of Dimorphic Fungi\n\nInhalation of spores of most of these dimorphic fungi causes systemic mycoses (the exception is *Sporothrix schenckii*, usually acquired by traumatic inoculation and causing subcutaneous disease):\n\n![coccidioides - Coccidioides immitis– arthroconidia Dr Arthur DiSalvo](\u002Fblogs\u002Fcoccidioides-300x195.gif)Figure: *Coccidioides immitis*– arthroconidia Dr Arthur DiSalvo\n\n### Histoplasma capsulatum\n\n*H. capsulatum* is a dimorphic fungus that exists as a mold in soil and as yeast in tissue. It causes histoplasmosis. (**Note:** *It does not possess a capsule*)\n\n### Blastomyces dermatitidis\n\n*B. dermatitidis* exists as a mold in soil and a yeast in tissue. The tissue yeast has a characteristic thick, doubly refractile wall and a **single broad-based bud.**\n\n### Paracoccidioides brasiliensis\n\n*P. brasiliensis* is a dimorphic fungus that exists as a mold in soil and yeasts in tissue. The yeast is thick-walled and has multiple buds. It causes Paracoccidioidomycosis, formerly named “**South American blastomycosis**”.\n\n### Coccidioides immitis\u002Fposadasii\n\n*Coccidioides* exists as a mold in soil and, uniquely among the dimorphic fungi, forms a **spherule filled with endospores** in tissue rather than a yeast. It causes coccidioidomycosis.\n\n### Sporothrix schenckii\n\n*Sporothrix schenckii* is a notable dimorphic fungus; it causes subcutaneous mycoses named sporotrichosis.\n\n### Talaromyces marneffei\n\n*Talaromyces marneffei*, formerly *Penicillium marneffei*, is a mold in environmental conditions, and yeast form is seen in tissues. It is an opportunistic pathogen causing systemic penicilliosis in AIDS patients in Thailand, China, Hong Kong, Vietnam, and other parts of Southeast Asia.\n\n![Sporothrix schenckii - Sabouraud’s dextrose agarplate culture is growing the fungusSporothrix schenckiiCDC\u002FDr. Lucille K. Georg](\u002Fblogs\u002FSporothrix-schenckii-300x207.jpg)Figure: Sabouraud’s dextrose agar plate culture is growing the fungus *Sporothrix schenckii* CDC\u002FDr. Lucille K. Georg\n\n## Colony Morphology of Dimorphic Fungi\n\n1. If the organism is dimorphic fungi, you may observe mixtures of yeast and mold forms. In slow-growing dimorphic fungi, mold appears hair-like or cobweb-like consistency. The mold form can be converted to yeast by incubating subcultures on enriched media at 37°C.\n2. During a mold-to-yeast conversion of *Blastomyces dermatitidis*, an intermediate form known as the “prickly stage” can be seen. A microscopic preparation of such stage may show a mixture of hyphae, budding yeasts, and forms intermediate between the two.\n3. Yeast forms of dimorphic fungi are similar to other true yeasts. In contrast to yeasts, they are generally slow-growing, and the colonies remain quite small.\n\n## How to Learn and Remember Dimorphic Fungi\n\n### Mnemonic 1\n\n**M**old in the **C**old, **Y**east in the **H**eat (**B**east)\n\nCaptures the universal behavioral rule; environment = mold, body = yeast.\n\n### Mnemonic 2\n\n**B**ody **H**eat  **P**robably **C**hanges **S**ha**P**e of the dimorphic fungi\n\n***B****lastomyces, **H**istoplasma, **P**aracoccidioides, **C**occidioides, **S**porothrix, **P**enicillium (Talaromyces) marneffei*\n\n**Note:** *Candida* and *Cryptococcus* are **not dimorphic fungi; they** are true yeast.\n\n[*Cryptococcus neoformans*](\u002Fcryptococcus-neoformans-properties-pathogenesis-diseases-lab-diagnosis\u002F) is an encapsulated, unicellular (yeast). It can cause pneumonia and cryptococcal meningitis in immunocompromised patients.\n\n[***Candida***](https:\u002F\u002Fmicrobeonline.com\u002Fcandida-albicans-pathogenesis-diagnosis\u002F) is a yeast; it can cause candidiasis “**thrush**.” In immunocompromised individuals, invasive candidiasis may develop.\n\n### Distinguishing tissue morphology of dimorphic fungi\n\n| Organism | Tissue form | Distinguishing microscopic feature |\n| --- | --- | --- |\n| *Histoplasma capsulatum* | Small intracellular yeast (2-4 μm) | Found WITHIN macrophages; \"no capsule despite the name\" |\n| *Blastomyces dermatitidis* | Yeast with broad-based bud | Double-refractile thick wall; SINGLE broad bud |\n| *Paracoccidioides brasiliensis* | Yeast with multiple buds | \"Mariner's wheel\" or \"ship's wheel\" — multiple peripheral buds around one mother cell |\n| *Coccidioides immitis* | Spherule (NOT yeast) | Large spherule (20-200 μm) filled with endospores. They are unique among dimorphic fungi |\n| *Sporothrix schenckii* | Cigar-shaped yeast | Small, oval to elongated \"cigar bodies\" |\n| *Talaromyces marneffei* | Yeast with central septum | Divides by FISSION (septum formation), not budding. This is unique among dimorphic fungi |\n\n**Memory trick for the two exceptions:** *Coccidioides* and *Talaromyces* both break the \"all dimorphic fungi become yeast\" rule: *Coccidioides* becomes a spherule, not a yeast, and *Talaromyces* divides by fission rather than budding.\n\n### Two clinical stories that make this unforgettable\n\n**Story 1: The Arizona construction worker** A construction worker in Phoenix, Arizona develops fever, cough, and chest pain after a dust storm during excavation work. Chest X-ray shows patchy infiltrates. A clinician unfamiliar with regional mycoses might treat this as bacterial pneumonia and see no improvement.\n\nThe diagnosis is coccidioidomycosis (\"Valley Fever\") which is extremely common in this specific geographic area following soil disturbance, and the patient's occupational exposure (excavation, disturbing desert soil) is the key clue that should have been asked about from the start.\n\n**Story 2: The laboratory technician's near-miss** A clinical laboratory receives a sputum sample from a patient with suspected fungal pneumonia. A junior technician opens the culture plate on the open bench to examine the mold growth more closely under a dissecting microscope; not realizing the colony's slow growth rate and cottony morphology are consistent with a dimorphic fungus.\n\nSenior staff immediately intervene, transfer the plate to a [biological safety cabinet](https:\u002F\u002Fmicrobeonline.com\u002Fbiological-safety-cabinet-bsc-types-working-mechanism\u002F), and the culture is later confirmed as *Blastomyces dermatitidis*. Inhaling even a small number of aerosolized conidia from an open culture plate can cause laboratory-acquired blastomycosis or histoplasmosis. This is precisely why suspected dimorphic mold cultures must never be examined outside a biosafety cabinet.\n\n## Key exam facts in one table\n\n| Question | Answer |\n| --- | --- |\n| What triggers the mold-to-yeast conversion? | Temperature increase to 37°C (body temperature) |\n| Why is this conversion considered a virulence factor? | Yeast form survives intracellularly and evades immune clearance better than mold form |\n| Which dimorphic fungus does NOT form a true yeast in tissue? | *Coccidioides immitis* forms a spherule instead |\n| Which dimorphic fungus divides by fission, not budding? | *Talaromyces marneffei* |\n| What is the \"prickly stage\"? | Intermediate form seen during *Blastomyces* mold-to-yeast conversion, which is a mixture of hyphae and budding yeast |\n| Are *Candida* and *Cryptococcus* dimorphic fungi? | No. *Candida* is yeast-like (yeast + pseudohyphae); *Cryptococcus* is a true yeast; neither undergoes the classic mold-yeast thermal switch |\n| Why must dimorphic fungal cultures be handled in a biosafety cabinet? | The mold form's airborne conidia are the infectious form, which has inhalation risk to lab personnel |\n\n**References**\n\n1. Klein, B. S., & Tebbets, B. (2007). Dimorphism and virulence in fungi. *Current opinion in microbiology*, *10*(4), 314–319. \u003Chttps:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.mib.2007.04.002>\n2. Rappleye, C. A., & Goldman, W. E. (2006). Defining virulence genes in the dimorphic fungi. *Annual review of microbiology*, *60*, 281–303. \u003Chttps:\u002F\u002Fdoi.org\u002F10.1146\u002Fannurev.micro.59.030804.121055>\n3. Bemmann W. (1981). Pilzdimorphismus – eine Literturübersicht \\[Dimorphism of fungi – review of the literature\\]. *Zentralblatt fur Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite naturwissenschaftliche Abteilung: Mikrobiologie der Landwirtschaft der Technologie und des Umweltschutzes*, *136*(5), 369–416.",[50,53,56,59,62],{"question":51,"answer":52},"Why do dimorphic fungi change shape based on temperature?","\u003Cp>Thermal dimorphism is a virulence adaptation. Mold form (25-30°C) optimises environmental spore dispersal. Yeast form (35-37°C, body temp) is smaller, survives within macrophages, and resists immune clearance better, a deliberate survival strategy.\u003C\u002Fp>",{"question":54,"answer":55},"Why must dimorphic fungal cultures be handled in a biosafety cabinet?","\u003Cp>The mold form's airborne conidia are the infectious form for humans. Examining cultures on an open bench risks aerosolising conidia and causing laboratory-acquired infection..\u003C\u002Fp>",{"question":57,"answer":58},"Which dimorphic fungi do NOT follow the typical mold-to-yeast pattern?","\u003Cp>\u003Cem>Coccidioides immitis\u003C\u002Fem> forms a spherule (20-200 μm, filled with endospores) instead of a true yeast. \u003Cem>Talaromyces marneffei\u003C\u002Fem> divides by fission (central septum) rather than budding. Both are common exam traps precisely because they break the general pattern.\u003C\u002Fp>",{"question":60,"answer":61},"Why is geographic\u002Ftravel history important when dimorphic fungal infection is suspected?","\u003Cp>Each organism has highly specific environmental niches: \u003Cem>Histoplasma\u003C\u002Fem> (Ohio\u002FMississippi valleys, bird\u002Fbat droppings), \u003Cem>Coccidioides \u003C\u002Fem>(SW USA arid soil), \u003Cem>Blastomyces\u003C\u002Fem> (Great Lakes\u002FOhio region), \u003Cem>Paracoccidioides\u003C\u002Fem> (rural Latin America), \u003Cem>Talaromyces\u003C\u002Fem> (Southeast Asia). Travel\u002Foccupational history dramatically narrows the differential before any test.\u003C\u002Fp>",{"question":63,"answer":64},"\u003Cp>Is \u003Cem>Sporothrix schenckii \u003C\u002Fem>a systemic or subcutaneous pathogen?\u003C\u002Fp>","\u003Cp>Primarily subcutaneous (sporotrichosis). Acquired by traumatic inoculation (rose thorns, splinters, so called 'rose gardener's disease'), typically remains localized with lymphocutaneous spread. Systemic dissemination is rare, occurring almost exclusively in severe immunocompromise.\u003C\u002Fp>",[66],"dimorphic-fungi",[68,100,123,154],{"slug":69,"title":70,"description":71,"seoTitle":42,"seoDescription":42,"author":72,"createdDate":73,"lastUpdatedDate":74,"draft":46,"category":75,"image":42,"faq":76,"tags":98},"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",[77,80,83,86,89,92,95],{"question":78,"answer":79},"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":81,"answer":82},"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":84,"answer":85},"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":87,"answer":88},"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":90,"answer":91},"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":93,"answer":94},"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":96,"answer":97},"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.",[99],"biosafety-levels",{"slug":101,"title":102,"description":103,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":104,"lastUpdatedDate":45,"draft":46,"category":47,"image":42,"faq":105,"tags":121},"cryptococcus-neoformans-properties-pathogenesis-diseases-lab-diagnosis","Cryptococcus neoformans: Pathogenesis, Lab Diagnosis","\u003Cp>\u003Cem>Cryptococcus neoformans\u003C\u002Fem> and \u003Cem>C. gattii:\u003C\u002Fem> capsule and melanin virulence, narrow-based budding, why it causes fungal meningitis in HIV\u002FAIDS, and lab diagnosis by India ink, birdseed agar, and the cryptococcal antigen (CrAg) test.\u003C\u002Fp>","2016-05-16",[106,109,112,115,118],{"question":107,"answer":108},"\u003Cp>How is \u003Cem>Cryptococcus\u003C\u002Fem> different from \u003Cem>Candida\u003C\u002Fem> on microscopy?\u003C\u002Fp>","\u003Cp>\u003Cem>Cryptococcus\u003C\u002Fem> is an encapsulated yeast with narrow-based budding and no pseudohyphae, and it shows a clear halo on India ink. \u003Cem>Candida\u003C\u002Fem> has no significant capsule, buds without the narrow neck, and forms pseudohyphae (and true hyphae for some species). The capsule and the absence of pseudohyphae are the quickest distinguishing features.\u003C\u002Fp>",{"question":110,"answer":111},"\u003Cp>Why does \u003Cem>Cryptococcus\u003C\u002Fem> cause meningitis specifically?\u003C\u002Fp>","It is neurotropic: after inhalation and pulmonary infection, it preferentially disseminates to the central nervous system in people with impaired T-cell immunity. Its capsule lets it evade phagocytosis, and the minimal inflammatory response in the brain allows it to grow relatively unchecked, producing subacute or chronic meningitis.",{"question":113,"answer":114},"\u003Cp>What is the difference between \u003Cem>C. neoformans\u003C\u002Fem> and \u003Cem>C. gattii\u003C\u002Fem>?\u003C\u002Fp>","\u003Cp>\u003Cem>C. neoformans\u003C\u002Fem> is found in bird droppings and infects mainly immunocompromised people, especially those with advanced HIV. \u003Cem>C. gattii\u003C\u002Fem> is associated with trees, has a more tropical distribution (with a known outbreak in the Pacific Northwest), and characteristically infects immunocompetent people. They are separated in the lab on CGB agar, which \u003Cem>C. gattii\u003C\u002Fem> turns blue.\u003C\u002Fp>",{"question":116,"answer":117},"Why has the CrAg test replaced India ink?","India ink is cheap and fast but detects the organism in fewer than half of cases and depends on the observer's experience. The cryptococcal antigen (CrAg) test, especially the lateral flow assay, is far more sensitive and specific, works on blood as well as CSF, needs no special equipment, and can even detect infection before symptoms appear in high-risk HIV patients.",{"question":119,"answer":120},"\u003Cp>Why does \u003Cem>Cryptococcus\u003C\u002Fem> grow black on birdseed agar?\u003C\u002Fp>","\u003Cp>\u003Cem>Cryptococcus neoformans\u003C\u002Fem> produces the enzyme phenoloxidase, which converts substrates in birdseed (niger seed) agar into melanin, turning the colonies brown to black. This is a rapid presumptive identification, and the same melanin production is one of the organism's virulence factors.\u003C\u002Fp>",[122],"fungal-diagnostics",{"slug":124,"title":125,"description":126,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":127,"lastUpdatedDate":45,"draft":46,"category":47,"image":42,"faq":128,"tags":153},"candida-albicans-pathogenesis-diagnosis","Candida albicans: Gram Stain, Morphology, Pathogenesis, and Lab Diagnosis","\u003Cp>\u003Cem>Candida albicans \u003C\u002Fem>stains Gram-positive and appears as budding yeast cells with pseudohyphae. Learn its microscopy, why it stains as it does, virulence and pathogenesis, the diseases it causes, and how it is identified in the lab.\u003C\u002Fp>","2016-03-14",[129,132,135,138,141,144,147,150],{"question":130,"answer":131},"\u003Cp>Is \u003Cem>Candida albicans\u003C\u002Fem> Gram-positive or Gram-negative?\u003C\u002Fp>","\u003Cp>It stains Gram-positive (purple). But \u003Cem>Candida\u003C\u002Fem> is a yeast, not a bacterium, and has no peptidoglycan cell wall, so it is best understood as a yeast that stains Gram-positive rather than a true Gram-positive bacterium. Its staining can be uneven (Gram-variable).\u003C\u002Fp>",{"question":133,"answer":134},"\u003Cp>What does\u003Cem> Candida albicans\u003C\u002Fem> look like under the microscope?\u003C\u002Fp>","\u003Cp>Oval budding yeast cells (blastoconidia) about 3 to 6 micrometers, often with pseudohyphae, which are chains of elongated cells with constrictions at the junctions. In tissue it can also form true hyphae.\u003C\u002Fp>",{"question":136,"answer":137},"\u003Cp>What is the difference between pseudohyphae and true hyphae?\u003C\u002Fp>","\u003Cp>Pseudohyphae are chains of elongated yeast cells with constrictions where the cells join. True hyphae have parallel walls and no constrictions.\u003C\u002Fp>",{"question":139,"answer":140},"\u003Cp>How is \u003Cem>Candida albicans\u003C\u002Fem> identified in the lab?\u003C\u002Fp>","\u003Cp>Presumptively by a positive germ tube test and \"feet\" on blood agar, and by chlamydospore formation on cornmeal agar. Definitive identification uses automated systems, MALDI-TOF, or molecular methods.\u003C\u002Fp>",{"question":142,"answer":143},"\u003Cp>What is the germ tube test?\u003C\u002Fp>","\u003Cp>A rapid presumptive test where \u003Cem>Candida albicans\u003C\u002Fem> forms a short hyphal outgrowth in serum. A positive result suggests \u003Cem>C. albicans\u003C\u002Fem>, though \u003Cem>C. dubliniensis\u003C\u002Fem> can also be positive.\u003C\u002Fp>",{"question":145,"answer":146},"\u003Cp>What diseases does \u003Cem>Candida albicans\u003C\u002Fem> cause?\u003C\u002Fp>","\u003Cp>Oral thrush, vaginal thrush, skin and nail infections, and, in immunocompromised or seriously ill patients, candidemia and disseminated infection affecting deep organs.\u003C\u002Fp>",{"question":148,"answer":149},"\u003Cp>How is \u003Cem>Candida\u003C\u002Fem> infection treated?\u003C\u002Fp>","\u003Cp>Mucocutaneous disease is treated with topical or oral azoles. Invasive candidiasis and candidemia are treated first-line with an echinocandin. Some species, such as \u003Cem>C. krusei\u003C\u002Fem> and \u003Cem>C. auris\u003C\u002Fem>, are drug-resistant, so identification guides treatment.\u003C\u002Fp>",{"question":151,"answer":152},"\u003Cp>Why can \u003Cem>Candida\u003C\u002Fem> be mistaken for \u003Cem>Staphylococcus\u003C\u002Fem> on culture?\u003C\u002Fp>","\u003Cp>On blood agar both can form creamy white colonies. A Gram stain or wet mount quickly distinguishes them, since \u003Cem>Candida\u003C\u002Fem> shows large budding yeast cells rather than clusters of cocci. This matters most with high vaginal swabs.\u003C\u002Fp>",[122],{"slug":155,"title":156,"description":157,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":158,"lastUpdatedDate":45,"draft":46,"category":47,"image":42,"faq":159,"tags":180},"overview-of-sporotrichosis-rose-gardeners-disease-and-laboratory-diagnosis","Sporothrix schenckii (Rose Gardener's Disease): Pathogenesis, and Lab Diagnosis","\u003Cp>\u003Cem>Sporothrix schenckii \u003C\u002Fem>causes sporotrichosis (rose gardener's disease), appearing as cigar-shaped yeast in tissue and rosette conidia in the mold form. Learn its morphology, lymphocutaneous spread, cat-transmitted disease, and treatment.\u003C\u002Fp>","2013-08-01",[160,163,166,169,172,175,178],{"question":161,"answer":162},"\u003Cp>What does \u003Cem>Sporothrix \u003C\u002Fem>look like under the microscope?\u003C\u002Fp>","\u003Cp>In tissue at body temperature it is a small (3 to 5 μm) cigar-shaped budding yeast. In the environment it is a mold with delicate hyphae and conidia arranged in a rosette or daisy pattern.\u003C\u002Fp>",{"question":164,"answer":165},"\u003Cp>What is cigar-shaped yeast?\u003C\u002Fp>","\u003Cp>It describes the elongated, cigar-like shape of the \u003Cem>Sporothrix\u003C\u002Fem> yeast cells seen in infected tissue. It is the identifying feature of \u003Cem>Sporothrix schenckii\u003C\u002Fem>.\u003C\u002Fp>",{"question":167,"answer":168},"\u003Cp>Why is it called rose gardener's disease?\u003C\u002Fp>","\u003Cp>Because it is classically acquired when the fungus is implanted into the skin by a thorn or plant material, such as from roses or sphagnum moss, so gardeners and florists are commonly affected.\u003C\u002Fp>",{"question":170,"answer":171},"\u003Cp>How does sporotrichosis spread in the body?\u003C\u002Fp>","\u003Cp>Most often as a lymphocutaneous infection: a nodule forms at the site of injury, and further nodules appear in a chain ascending along the lymphatic vessels.\u003C\u002Fp>",{"question":173,"answer":174},"\u003Cp>What is cat-transmitted sporotrichosis?\u003C\u002Fp>","\u003Cp>A zoonotic form caused mainly by \u003Cem>Sporothrix brasiliensis\u003C\u002Fem>, spread from infected cats through scratches and bites. It is common in Brazil, tends to be more severe, and affects cat owners and veterinarians.\u003C\u002Fp>",{"question":176,"answer":177},"\u003Cp>How is sporotrichosis diagnosed?\u003C\u002Fp>","\u003Cp>Culture is the gold standard, because the yeast is hard to see directly. The mold that grows is confirmed by converting it to the cigar-shaped yeast form at 37°C. PAS and silver stains can show the yeast in tissue.\u003C\u002Fp>",{"question":179,"answer":179},"",[66],{"enabled":182,"threads":183,"total":184},true,[],0,[186,192,199,206,212,217,223,228,234,237,243],{"slug":187,"name":43,"description":188,"image":189,"body":190,"postCount":191},"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.*",473,{"slug":193,"name":194,"description":195,"image":196,"body":197,"postCount":198},"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.",78,{"slug":200,"name":201,"description":202,"image":203,"body":204,"postCount":205},"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":207,"name":208,"description":202,"image":209,"body":210,"postCount":211},"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":213,"name":214,"description":202,"image":42,"body":215,"postCount":216},"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":218,"name":219,"description":220,"image":42,"body":221,"postCount":222},"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":224,"name":225,"description":226,"image":42,"body":42,"postCount":227},"guest-author","Guest Author","Guest Author \u002F Contributor",1,{"slug":229,"name":230,"description":202,"image":231,"body":232,"postCount":233},"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.",16,{"slug":235,"name":236,"description":226,"image":42,"body":42,"postCount":227},"dr-poonam-acharya","Dr. Poonam Acharya",{"slug":238,"name":72,"description":239,"image":240,"body":241,"postCount":242},"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":244,"name":245,"description":246,"image":247,"body":248,"postCount":227},"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.",[250,257,263,268,273,278,282,286,290,295,299,304,308,313,318,322,326,330,335,340,344,348,352,357,360,364,368,372,377,382,386,390,394,398,402,406,410,414,417,421,425,429,433,437,441,445,448,452,457,461,465,469,473,477,481,485,489,493,497,501,505,509,513,517,521,525,529,533,536,540,543,546,549],{"slug":251,"name":252,"description":253,"image":254,"body":255,"postCount":256},"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":258,"name":259,"description":260,"image":42,"body":261,"postCount":262},"microscopy","Microscopy","Microscope types, components, and microscopy techniques","These are list of blog posts related to microscopy. ",12,{"slug":264,"name":265,"description":266,"image":42,"body":42,"postCount":267},"gram-positive-cocci","Gram-Positive Cocci","Staphylococcus, Streptococcus, Enterococcus, Micrococcus — organisms, diseases, and identification tests",11,{"slug":269,"name":270,"description":271,"image":42,"body":42,"postCount":272},"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":274,"name":275,"description":276,"image":42,"body":42,"postCount":277},"gram-positive-rods","Gram-Positive Rods","Bacillus, Clostridium, Listeria, Corynebacterium, Actinomyces and related organisms",8,{"slug":279,"name":280,"description":281,"image":42,"body":42,"postCount":267},"mycobacteria","Mycobacteria","Mycobacterium tuberculosis, leprosy, atypical mycobacteria, and acid-fast organism diagnosis",{"slug":283,"name":284,"description":285,"image":42,"body":42,"postCount":267},"anaerobic-bacteriology","Anaerobic Bacteriology","Anaerobic organisms, anaerobic culture methods, and anaerobic infection diagnosis",{"slug":287,"name":288,"description":289,"image":42,"body":42,"postCount":262},"enterobacteriaceae","Enterobacteriaceae","Identification, differentiation, and clinical significance of Enterobacteriaceae family members",{"slug":291,"name":292,"description":293,"image":42,"body":42,"postCount":294},"spirochetes","Spirochetes","Treponema, Leptospira, Borrelia and spirochetal infections",7,{"slug":296,"name":297,"description":298,"image":42,"body":42,"postCount":256},"food-microbiology","Food Microbiology","Food-borne pathogens, food safety, spoilage, and preservation",{"slug":300,"name":301,"description":302,"image":42,"body":42,"postCount":303},"antimicrobial-susceptibility-testing","Antimicrobial Susceptibility Testing","Methods for testing antibiotic susceptibility in clinical microbiology",21,{"slug":305,"name":306,"description":307,"image":42,"body":42,"postCount":277},"antimicrobials-moa-amr","Antimicrobials (MOA & AMR)","Mechanisms, detection, and clinical significance of antimicrobial resistance",{"slug":309,"name":310,"description":311,"image":42,"body":42,"postCount":312},"sterilization-disinfection","Sterilization and Disinfection","Methods of sterilization and disinfection in healthcare and laboratory settings",10,{"slug":314,"name":315,"description":316,"image":42,"body":42,"postCount":317},"specimen-collection-transport","Specimen Collection and Transport","Collection, handling, and transport of clinical specimens for microbiological testing",27,{"slug":319,"name":320,"description":321,"image":42,"body":42,"postCount":303},"bacterial-structure-physiology","Bacterial Structure and Physiology","Bacterial cell structure, growth, physiology, and environmental factors affecting growth",{"slug":323,"name":324,"description":42,"image":42,"body":325,"postCount":216},"horizontal-gene-transfer","Horizontal Gene Transfer","Articles related to **Horizontal Gene Transfer**",{"slug":327,"name":328,"description":42,"image":42,"body":329,"postCount":312},"chromatography","Chromatography","Information about chromatographic techniques.",{"slug":331,"name":332,"description":333,"image":42,"body":334,"postCount":294},"electrophoresis","Electrophoresis","Information about Electrophoresis Techniques ","Detailed information  about Electrophoresis Techniques ",{"slug":336,"name":337,"description":338,"image":42,"body":339,"postCount":216},"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":341,"name":342,"description":343,"image":42,"body":42,"postCount":216},"bacteriophage","Bacteriophage","Description about Bacteriophage.",{"slug":345,"name":346,"description":347,"image":42,"body":42,"postCount":216},"malaria","Malaria","It is the collections of articles regarding malarial disease. ",{"slug":349,"name":350,"description":351,"image":42,"body":42,"postCount":216},"anaerobic-culture-techniques","Anaerobic Culture Techniques","Posts related with Anaerobic Culture Techniques.",{"slug":353,"name":354,"description":355,"image":42,"body":42,"postCount":356},"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":99,"name":358,"description":359,"image":42,"body":42,"postCount":294},"Biosafety levels ","Articles related to Biosafety Levels",{"slug":361,"name":362,"description":363,"image":42,"body":42,"postCount":272},"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":365,"name":366,"description":367,"image":42,"body":42,"postCount":216},"pipette","Pipette","Posts related with Pipette. ",{"slug":369,"name":370,"description":371,"image":42,"body":42,"postCount":277},"bacteriology-mcqs","Bacteriology MCQs","This sections lists MCQs in Bacteriology.",{"slug":373,"name":374,"description":375,"image":42,"body":42,"postCount":376},"parasitology-mcqs","Parasitology MCQs","This section lists MCQs in Parasitology.",2,{"slug":378,"name":379,"description":380,"image":42,"body":42,"postCount":381},"virology-mcqs","Virology MCQs","This is the collections of Multiple Choice Questions in Virology.",4,{"slug":383,"name":384,"description":385,"image":42,"body":42,"postCount":272},"mcqs-in-microbiology","MCQs in Microbiology","This section lists the collections of Multiple Choice Questions in General Microbiology Topics. ",{"slug":387,"name":388,"description":389,"image":42,"body":42,"postCount":277},"immunology-mcqs","Immunology MCQs","In this section; we are posting collections of Multiple Choice Questions about Immunology. ",{"slug":391,"name":392,"description":393,"image":42,"body":42,"postCount":222},"microbial-curiosities","Microbial Curiosities","In this clusters, we are posting interesting and unique information about Microorganisms. ",{"slug":395,"name":396,"description":397,"image":42,"body":42,"postCount":303},"bacterial-culture-media","Bacterial Culture Media","Posts related to Bacterial Culture Media. ",{"slug":399,"name":400,"description":401,"image":42,"body":42,"postCount":216},"fungal-culture-media","Fungal Culture Media","Posts related to Fungal Culture Media.",{"slug":403,"name":404,"description":405,"image":42,"body":42,"postCount":272},"motility-test","Motility Test","This lists the procedure regarding various tests methods for bacterial motility.",{"slug":407,"name":408,"description":409,"image":42,"body":42,"postCount":312},"bacterial-enumeration","Bacterial enumeration","These posts are related to isolation and enumeration of bacteria. ",{"slug":411,"name":412,"description":413,"image":42,"body":42,"postCount":376},"gram-positive-coccobacillus","Gram-positive coccobacillus","List of Gram Positive Coccobacilli",{"slug":66,"name":415,"description":416,"image":42,"body":42,"postCount":381},"Dimorphic Fungi","This is about various dimorphic fungi. ",{"slug":418,"name":419,"description":420,"image":42,"body":42,"postCount":294},"bacterial-classification","Bacterial Classification","These posts are related with various approaches used for the classification of Bacteria. ",{"slug":422,"name":423,"description":424,"image":42,"body":42,"postCount":272},"immunofluorescence","Immunofluorescence ","Various Tests related to Immunofluorescence ",{"slug":426,"name":427,"description":428,"image":42,"body":42,"postCount":222},"antibody-mediated-immunity","Antibody-mediated Immunity","This clusters links the articles that are sharing insights about Antibody-mediated immunity. ",{"slug":430,"name":431,"description":432,"image":42,"body":42,"postCount":294},"hypersensitivity","Hypersensitivity","Articles related to Hypersensitivity.",{"slug":434,"name":435,"description":42,"image":42,"body":42,"postCount":436},"haemophilus","Haemophilus",3,{"slug":438,"name":439,"description":440,"image":42,"body":42,"postCount":381},"sexually-transmitted-infections-stis","Sexually transmitted infections (STIs)","This is the clusters of infections that are transmitted sexually. ",{"slug":442,"name":443,"description":444,"image":42,"body":42,"postCount":262},"adaptive-immunity","Adaptive Immunity","Blog posts related to B Cell Immunity and T Cell Immunity.",{"slug":122,"name":446,"description":447,"image":42,"body":42,"postCount":256},"Fungal Diagnostics","Various methods used for the Diagnosis of Fungal Infections. ",{"slug":449,"name":450,"description":451,"image":42,"body":42,"postCount":272},"laboratory-storage-and-preservation","Laboratory Storage and Preservation","Articles about Laboratory Storage of Antimicrobial Disk, Test organisms and Equipment used for this process. ",{"slug":453,"name":454,"description":455,"image":42,"body":456,"postCount":216},"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":458,"name":459,"description":460,"image":42,"body":42,"postCount":277},"laboratory-glassware","Laboratory Glassware","Posts about Laboratory Glassware. ",{"slug":462,"name":463,"description":464,"image":42,"body":42,"postCount":216},"helminths","Helminths","In this section, we are covering properties, life cycle, pathogenesis and laboratory diagnosis of Helminths\u002FHelminthic infestations. ",{"slug":466,"name":467,"description":468,"image":42,"body":42,"postCount":216},"protozoan-parasite","Protozoan Parasite","In this cluster, we are covering protozoan parasites. ",{"slug":470,"name":471,"description":472,"image":42,"body":42,"postCount":227},"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":474,"name":475,"description":476,"image":42,"body":42,"postCount":312},"bacterial-staining-technique","Bacterial Staining Technique","Lists of various staining techniques that are used to stain bacteria. ",{"slug":478,"name":479,"description":480,"image":42,"body":42,"postCount":211},"enzyme-tests","Enzyme Tests","\u003Cp>Various Biochemical Test that are based on enzymatic activity of the microorganisms. \u003C\u002Fp>",{"slug":482,"name":483,"description":484,"image":42,"body":42,"postCount":267},"carbohydrate-utilization","Carbohydrate Utilization","\u003Cp>Various biochemical tests which are related to Carbohydrate fermentation or Utilization\u003C\u002Fp>",{"slug":486,"name":487,"description":488,"image":42,"body":42,"postCount":272},"susceptibility-based-id","Susceptibility-based ID","\u003Cp>These are susceptibility based identification test such as optochin sensitivity, bacitracin sensitivity etc. \u003C\u002Fp>",{"slug":490,"name":491,"description":492,"image":42,"body":42,"postCount":381},"microbial-metabolism","Microbial Metabolism","\u003Cp>Tests about Microbial Metabolism. \u003C\u002Fp>",{"slug":494,"name":495,"description":496,"image":42,"body":42,"postCount":277},"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":498,"name":499,"description":500,"image":42,"body":42,"postCount":436},"atypical-pneumonia","Atypical Pneumonia","\u003Cp>Organisms responsible for Atypical Pneumonia. \u003C\u002Fp>",{"slug":502,"name":503,"description":504,"image":42,"body":42,"postCount":272},"antigen","Antigen","\u003Cp>Various articles related to Antigens.\u003C\u002Fp>",{"slug":506,"name":507,"description":508,"image":42,"body":42,"postCount":294},"innate-immunity","Innate Immunity","\u003Cp>Articles related to Innate Immunity. \u003C\u002Fp>",{"slug":510,"name":511,"description":512,"image":42,"body":42,"postCount":381},"respiratory-tract-infection","Respiratory Tract Infection","\u003Cp>In this cluster, you can see various etiological agents that causes respiratory tract infection. \u003C\u002Fp>",{"slug":514,"name":515,"description":516,"image":42,"body":42,"postCount":272},"torch-infection","TORCH Infection","\u003Cp>In this section; you can find articles related with TOCH infection. \u003C\u002Fp>",{"slug":518,"name":519,"description":520,"image":42,"body":42,"postCount":294},"microbiology-for-beginners","Microbiology for Beginners","\u003Cp>These articles are very basic articles, which will share general concepts in Microbiology. \u003C\u002Fp>",{"slug":522,"name":523,"description":524,"image":42,"body":42,"postCount":216},"dna-replication","DNA Replication","\u003Cp>Articles related to DNA and Replication of DNA. \u003C\u002Fp>",{"slug":526,"name":527,"description":528,"image":42,"body":42,"postCount":294},"genetic-code","Genetic Code","\u003Cp>Articles related to Genetic Code.\u003C\u002Fp>",{"slug":530,"name":531,"description":532,"image":42,"body":42,"postCount":272},"molecular-technique","Molecular Technique","\u003Cp>Posts related to Molecular Techniques. \u003C\u002Fp>",{"slug":534,"name":535,"description":42,"image":42,"body":42,"postCount":227},"colorimetric-assay","Colorimetric Assay ",{"slug":537,"name":538,"description":539,"image":42,"body":42,"postCount":272},"pharmaceutical-microbiology","Pharmaceutical Microbiology","\u003Cp>Various articles related to Pharmaceutical Microbiology\u003C\u002Fp>",{"slug":541,"name":542,"description":42,"image":42,"body":42,"postCount":436},"blood-and-immune-cells","Blood and Immune Cells",{"slug":544,"name":545,"description":42,"image":42,"body":42,"postCount":272},"host-pathogen-interaction","Host Pathogen Interaction",{"slug":547,"name":548,"description":42,"image":42,"body":42,"postCount":436},"blood-culture","Blood Culture",{"slug":550,"name":551,"description":42,"image":42,"body":42,"postCount":376},"environmental-microbiology","Environmental microbiology "]