[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fxLN3MUwXCdr5RPjwZYIDpOj8CHyjOmngWTgoKXPtZbg":3,"$fBd9PhUW8tZp-u_h4qhAuaIYoKuJKTzEvCHqxCt0oLfo":36,"$f3Ft0rKFJHppdzE-vuveecxx1BUcg9iOlMLtyzf_MJDg":114,"$fucxFBm2ZjZfGSdmdRaSNGBI_F0jJme4f0GTvzUhQfL8":179},[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":67,"related":68,"comments":110},"strongyloides-stercoralis-life-cycle-pathogenesis-lab-diagnosis","Strongyloides stercoralis: Life Cycle, Pathogenesis, Treatment, and Laboratory Diagnosis","\u003Cp>Why can \u003Cem>Strongyloides stercoralis\u003C\u002Fem> persist for decades and then turn deadly? Complete life cycle, the autoinfection and hyperinfection mechanism, clinical features, treatment with ivermectin, and why a single stool examination often misses it.\u003C\u002Fp>",null,"Acharya Tankeshwar","2026-08-30",false,"parasitology","A man who left a tropical region forty years ago is admitted with pneumonia and a bloodstream infection with gut bacteria. He has just been started on steroids for another problem. His blood count shows a puzzling feature that was present for years: a mildly raised eosinophil count that no one had explained.\n\nThe cause of everything, the decades-long eosinophilia, the sudden pneumonia, and the gut bacteria in his blood, is a single worm he acquired four decades earlier and never cleared: ***Strongyloides stercoralis*.** The steroids removed the only thing keeping it in check, the worm multiplied inside him without any new exposure, and larvae carried gut bacteria into his lungs and blood.\n\nThis sequence is what makes *Strongyloides* different from almost every other intestinal worm. **It can maintain itself in one person for decades through internal reinfection,** it often causes only vague symptoms until then, and it can turn suddenly lethal when immunity is suppressed. Understanding the parasite means understanding that cycle.\n\n## General Characteristics\n\n*Strongyloides stercoralis* is a small intestinal nematode, a roundworm, sometimes called the **threadworm**, although that name is also used loosely for other worms and is best avoided to prevent confusion with pinworm. It is found in warm, humid regions with poor sanitation across the tropics and subtropics, and it also persists in temperate areas among people who acquired it earlier in life.\n\nTwo features set it apart from the other soil-transmitted nematodes such as [hookworm](https:\u002F\u002Fmicrobeonline.com\u002Fhookworm-ancylostoma-necator\u002F) and [*Ascaris*](https:\u002F\u002Fmicrobeonline.com\u002Fascaris-lumbricoides-life-cycle-pathogenesis-and-lab-diagnosis\u002F).\n\n1. First, only the female is parasitic in humans, and she reproduces without a male by a process in which the eggs develop without fertilization.\n2. Second, and more important, *Strongyloides* can complete its cycle entirely within one host through autoinfection, so the infection can sustain and even amplify itself without any new exposure from the environment. No other common human intestinal nematode does this to the same degree.\n\nThe parasite also has a free-living cycle in the soil, in which male and female worms live and reproduce outside a host.\n\n*This alternation between a parasitic cycle in humans and a free-living cycle in the soil is unusual among the intestinal worms and is a favorite examination point.*\n\n## Morphology\n\nThree forms matter for understanding the parasite and its diagnosis: two kinds of larva and the parasitic adult female.\n\n1. The **rhabditiform larva** is the first-stage larva. It is the form usually found in the stool, which is a key diagnostic point, because most other intestinal nematodes are detected as eggs rather than larvae. The rhabditiform larva has a short mouth cavity and a prominent structure in the middle of its body used to identify it. It is the stage that must be distinguished from hookworm larvae, which are also occasionally seen in stool.\n2. The **filariform larva** is the infective third-stage larva. It is longer and more slender, and it is the form that penetrates skin to begin infection. In autoinfection, the parasite converts to this infective filariform stage while still inside the host, which is the step that allows internal reinfection.\n3. The **parasitic adult female** is a very small, slender worm that lives buried in the wall of the small intestine, where she lays her eggs. The eggs hatch within the intestine, so it is the hatched rhabditiform larvae, not eggs, that appear in the stool.\n\n| Form | Role | Key point |\n| --- | --- | --- |\n| Rhabditiform larva | First-stage larva; found in stool | Short mouth cavity; the stage usually seen in diagnosis |\n| Filariform larva | Infective third-stage larva | Penetrates skin; the form responsible for autoinfection |\n| Parasitic adult female | Lives in the small intestinal wall; lays eggs | Reproduces without a male; eggs hatch inside the gut |\n\nBecause the eggs hatch inside the intestine and release larvae, the diagnostic stage in stool is the rhabditiform larva rather than an egg. This single fact separates *Strongyloides* from hookworm and the other soil-transmitted nematodes in the laboratory.\n\n## Life Cycle of Strongyloides stercoralis\n\n*Strongyloides* has three interlocking cycles: a direct parasitic cycle, a free-living cycle in the soil, and an autoinfection cycle inside the host. **The autoinfection cycle is what makes the parasite clinically dangerous.**\n\n\u003Cfigure>\n\u003Cimg src=\"https:\u002F\u002Fassets.microbeonline.com\u002Fblogs\u002Fstrongyloides-stercoralis-life-cycle.jpg\" alt=\"Strongyloides stercoralis life cycle\" width=\"965\" height=\"808\" draggable=\"false\" contenteditable=\"false\">\u003Cfigcaption>Figure: Strongyloides stercoralis life cycle\u003C\u002Ffigcaption>\n\u003C\u002Ffigure>\n\n**The parasitic cycle** begins when **infective filariform larvae in the soil penetrate the skin, usually of the feet**. They enter the bloodstream, travel to the lungs, break into the air spaces, are coughed up and swallowed, and reach the small intestine. There the larvae mature into parasitic adult females that burrow into the intestinal wall and lay eggs. The eggs hatch within the intestine, and the resulting rhabditiform larvae are passed in the stool to the outside.\n\n**In the free-living cycle,** rhabditiform larvae passed in the stool develop in the soil into free-living adult males and females that reproduce, producing a new generation of larvae. Some of these become infective filariform larvae ready to penetrate the skin of the next host. This soil cycle lets the parasite persist and multiply in the environment.\n\n**The autoinfection cycle** is the crucial difference. Instead of leaving the body, some rhabditiform larvae transform into infective filariform larvae while still inside the intestine. These larvae penetrate the intestinal wall or the skin around the anus and re-enter the body, travel through the lungs, and return to the intestine to mature. Because this happens without any new exposure, a single original infection can maintain itself for decades, which is why people can carry *Strongyloides* for forty years or more after leaving an area where it is found.\n\nWhen the host's immunity is intact, autoinfection proceeds slowly and the parasite burden stays low. When immunity is suppressed, the rate of autoinfection rises sharply. Larvae are produced and reinvade in large numbers, the parasite burden climbs rapidly, and the infection escalates into hyperinfection and disseminated disease.\n\n## Pathogenesis\n\nThe damage caused by *Strongyloides* follows the path the larvae take through the body, and its severity depends on the rate of autoinfection.\n\nAt the skin, penetrating larvae cause a local itchy, sometimes serpentine rash. When larvae migrating during autoinfection penetrate the skin around the anus and trunk, they produce a rapidly moving, itchy track called **larva currens, a feature fairly specific to *Strongyloides*.**\n\nIn the lungs, migrating larvae break into the air spaces and cause irritation, cough, and wheezing. In heavy infection this becomes significant respiratory illness.\n\nIn the intestine, the adult females and the movement of larvae through the mucosa cause inflammation, abdominal pain, diarrhea, and, in heavy infection, malabsorption. Many people with a stable, low-burden infection have only mild or intermittent symptoms, and a persistently raised eosinophil count may be the only clue for years.\n\nHyperinfection and disseminated disease are the feared outcomes. When immunity is suppressed, most importantly by corticosteroids, and also by conditions such as infection with the virus HTLV-1, malnutrition, and some cancers, autoinfection accelerates. In hyperinfection, very large numbers of larvae migrate through the lungs and gut. In disseminated disease, larvae spread beyond this usual route to organs such as the brain, liver, and kidneys. As the larvae travel, they carry gut bacteria with them from the intestine into the bloodstream and other sites, so hyperinfection is frequently complicated by bloodstream infection and meningitis caused by intestinal bacteria. Untreated, hyperinfection has a very high fatality rate.\n\nA critical clinical point follows from this. Corticosteroids are the single most important trigger of hyperinfection. Giving steroids to a person with an unrecognized chronic *Strongyloides* infection can convert a silent, decades-old infection into a fatal one. This is why screening for *Strongyloides* is recommended before starting steroids or other immunosuppression in anyone who may have been exposed.\n\n## Clinical Findings\n\nThe clinical picture ranges from no symptoms at all to overwhelming, fatal disease, depending on the parasite burden and the host's immunity.\n\nChronic, uncomplicated infection often causes:\n\n- Intermittent abdominal pain, bloating, and diarrhea\n- An itchy skin rash, including the moving track of larva currens\n- Cough or wheezing during larval migration\n- A raised eosinophil count, sometimes the only finding for years\n\nHyperinfection and disseminated disease, seen when immunity is suppressed, cause:\n\n- Severe abdominal pain, profuse diarrhea, and intestinal bleeding or obstruction\n- Cough, breathlessness, and respiratory failure as larvae flood the lungs\n- Bloodstream infection and meningitis with gut bacteria carried by the larvae\n- Spread of larvae to organs including the brain, liver, and kidneys\n- A high risk of death without prompt treatment\n\nAn important and dangerous feature of hyperinfection is that the eosinophil count, usually raised in chronic infection, is often low or normal when the patient is on steroids, because steroids suppress eosinophils. A normal eosinophil count therefore does not rule out severe *Strongyloides* infection in an immunosuppressed patient.\n\n## Laboratory Diagnosis\n\nDiagnosing *Strongyloides* is difficult because larval output in the stool is low and irregular, and a single routine examination misses many infections. The methods below are arranged from least to most sensitive.\n\n**Direct stool microscopy**. Examination of a stool sample may show motile rhabditiform larvae. This is specific when larvae are seen, but the sensitivity of a single specimen is low because larvae are shed in small numbers and intermittently. Examining several specimens collected on different days improves detection. The larvae must be distinguished from hookworm larvae, which can appear if a stool sample is left standing and hookworm eggs hatch.\n\n**Larval concentration and culture methods**. Because larvae are scarce, methods that concentrate or culture them are far more sensitive than a plain smear. The Baermann technique uses the tendency of live larvae to move toward warm water to collect them from a stool sample, and the Harada-Mori filter paper culture and agar plate culture allow larvae to grow and multiply so they can be found more easily. Agar plate culture is among the most sensitive microscopy-based methods, because migrating larvae leave visible tracks of bacterial growth across the plate. These larval-recovery methods are the preferred microscopy approach when *Strongyloides* is suspected.\n\n**Serology.** Antibody detection by enzyme immunoassay is more sensitive than a single stool examination and is useful for screening, particularly before immunosuppression and in people with unexplained eosinophilia. Its limitations are that it can cross-react with other worm infections and that antibody may persist after treatment, so it is better for detecting exposure than for confirming cure.\n\n**Molecular methods**. PCR on stool detects *Strongyloides* DNA with high specificity and is increasingly used in reference laboratories, though availability is limited.\n\nA practical rule brings these together. Because a single stool examination is so often falsely negative, *Strongyloides* should not be excluded on one negative stool. In anyone with unexplained eosinophilia, a compatible history of exposure, or a plan to start steroids, a larval-recovery method or serology should be used rather than relying on routine microscopy.\n\n## Treatment\n\nThe drug of choice for *Strongyloides* infection is ivermectin, which is effective against the larvae and is used for both uncomplicated infection and hyperinfection. Albendazole is an alternative but is less effective than ivermectin.\n\nThe aim of treatment differs from that for most intestinal worms. Because *Strongyloides* sustains itself through autoinfection, the goal is complete eradication, not merely reducing the worm burden. If any parasites remain, autoinfection can rebuild the infection, so cure must be confirmed and treatment repeated if necessary.\n\nIn hyperinfection and disseminated disease, treatment is a medical emergency. Ivermectin is given and continued until larvae are cleared, any immunosuppression is reduced where possible, and the accompanying bloodstream infection or meningitis with gut bacteria is treated at the same time. Even with treatment, the fatality of hyperinfection remains high, which is why prevention through screening is so important.\n\nThe most effective preventive measure in clinical practice is to identify and treat chronic infection before immunosuppression. Screening people with a history of exposure, and treating those found positive, before starting corticosteroids or other immunosuppressive therapy prevents the conversion of silent infection into fatal hyperinfection. General prevention follows the same principles as for other soil-transmitted worms: sanitation, safe disposal of feces, and wearing footwear to avoid skin penetration by larvae in contaminated soil.\n\n## Where Students Actually Get Confused\n\n**1. \"*Strongyloides* is diagnosed by finding its eggs in stool, like hookworm and *Ascaris*.\"** No. The eggs of *Strongyloides* hatch inside the intestine, so the stage passed in the stool is the rhabditiform larva, not an egg. Finding larvae rather than eggs in a fresh stool sample is a key feature that separates *Strongyloides* from the other soil-transmitted nematodes.\n\n**2. \"One negative stool examination rules out *Strongyloides*.\"** It does not. Larval output is low and irregular, and a single routine stool examination misses many infections. Diagnosis requires examining several specimens, using a larval-recovery method such as the Baermann technique or agar plate culture, or using serology. Excluding the infection on one negative stool is a common and dangerous error.\n\n**3. \"Autoinfection just means getting reinfected from the environment again.\"** Autoinfection is internal. Rhabditiform larvae transform into infective filariform larvae inside the intestine and reinvade the same host without ever leaving the body. This is why a single infection can persist for decades with no new exposure, and why the infection can amplify itself when immunity falls.\n\n**4. \"Steroids treat the inflammation, so they help a *Strongyloides* patient.\"** Steroids are the opposite of helpful here. Corticosteroids are the single most important trigger of hyperinfection, because they suppress the immunity that holds autoinfection in check. Giving steroids to a person with unrecognized chronic *Strongyloides* can convert a silent infection into a fatal one, which is why screening before immunosuppression matters.\n\n**5. \"A normal eosinophil count means the infection is not severe.\"** Not in an immunosuppressed patient. Eosinophilia is common in chronic infection, but steroids suppress eosinophils, so the count is often normal or low precisely when the patient is at greatest risk of hyperinfection. A normal eosinophil count does not rule out severe disease in someone on steroids.\n\n**6. \"Reducing the worm burden is enough, as with other intestinal worms.\"** Because *Strongyloides* reproduces inside the host through autoinfection, any remaining parasites can rebuild the infection. The goal of treatment is complete eradication and confirmation of cure, not simply lowering the number of worms.\n\n## Key Exam Facts\n\n| Fact | Detail | Memory hook |\n| --- | --- | --- |\n| Organism | *Strongyloides stercoralis*, an intestinal nematode | The worm with autoinfection |\n| Diagnostic stage in stool | Rhabditiform larva, not eggs | Eggs hatch inside the gut |\n| Infective stage | Filariform larva | Penetrates skin to infect |\n| Parasitic adult | Female only; reproduces without a male | No parasitic male in humans |\n| Unique life-cycle feature | Autoinfection; also a free-living soil cycle | Sustains itself for decades |\n| Skin sign of autoinfection | Larva currens, a fast-moving itchy track | Currens means running |\n| Route through the body | Skin, lungs, swallowed, small intestine | Same migration as hookworm |\n| Feared complication | Hyperinfection and disseminated disease | Larvae flood lungs, gut, and beyond |\n| Main trigger of hyperinfection | Corticosteroids; also HTLV-1 | Steroids unleash the worm |\n| Bacteria in blood during hyperinfection | Larvae carry gut bacteria into blood and meninges | Gram-negative sepsis and meningitis |\n| Eosinophils in chronic infection | Often raised | May be the only clue for years |\n| Eosinophils on steroids | Often normal or low | Normal count does not reassure |\n| Most sensitive microscopy method | Agar plate culture; also Baermann and Harada-Mori | Culture the larvae to find them |\n| Serology | Sensitive; useful for screening before steroids | Good for exposure, not for cure |\n| Drug of choice | Ivermectin | Aim is complete eradication |\n| Prevention in practice | Screen and treat before immunosuppression | Clear it before steroids |\n\n## How to Remember\n\n**Larvae, not eggs.** The one laboratory fact that anchors *Strongyloides* is that you find larvae in the stool, not eggs, because the eggs hatch inside the gut. Pair this with the two larval names: rhabditiform is the one you find (diagnosis), filariform is the one that infects (penetration and autoinfection). Rhabditiform for reporting, filariform for infecting.\n\n**The steroid trap.** Hold one clinical scenario firmly: a person with a silent, decades-old infection is given steroids, and the worm multiplies out of control. Steroids suppress both the immunity that restrains autoinfection and the eosinophils that would otherwise warn you. This single image links autoinfection, hyperinfection, the steroid trigger, and the falsely normal eosinophil count.\n\n**Larva currens runs.** The skin sign of autoinfection is larva currens, and currens means running. Picture a fast-moving, itchy track as the larva runs under the skin. It is the visible sign that the parasite is reinfecting from within.\n\n**Eradicate, do not just reduce.** For most worms you lower the burden. For *Strongyloides* you must clear it completely, because anything left behind reinfects the host through autoinfection. The aim is cure, not reduction.\n\n## References and Further Readings\n\n1. Garcia, L. S. (2016). *Diagnostic Medical Parasitology* (6th ed.). ASM Press.\n2. Procop, G. W., Church, D. L., Hall, G. S., Janda, W. M., Koneman, E. W., Schreckenberger, P. C., & Woods, G. L. (2017). *Koneman's Color Atlas and Textbook of Diagnostic Microbiology* (7th ed.). Wolters Kluwer.\n3. Nutman, T. B. (2017). Human infection with *Strongyloides stercoralis* and other related *Strongyloides* species. *Parasitology*, 144(3), 263–273. \u003Chttps:\u002F\u002Fdoi.org\u002F10.1017\u002FS0031182016000834>\n4. Buonfrate, D., Requena-Mendez, A., Angheben, A., et al. (2013). Severe strongyloidiasis: a systematic review of case reports. *BMC Infectious Diseases*, 13, 78. \u003Chttps:\u002F\u002Fdoi.org\u002F10.1186\u002F1471-2334-13-78>\n5. CDC – DPDx: Strongyloidiasis. Centers for Disease Control and Prevention. \u003Chttps:\u002F\u002Fwww.cdc.gov\u002Fdpdx\u002Fstrongyloidiasis\u002Findex.html>\n6. World Health Organization. (2017). *Diagnostic methods for the control and elimination of the neglected tropical diseases*. WHO.",[49,52,55,58,61,64],{"question":50,"answer":51},"\u003Cp>Why is \u003Cem>Strongyloides stercoralis\u003C\u002Fem> diagnosed by finding larvae instead of eggs?\u003C\u002Fp>","\u003Cp>The parasitic adult female lays her eggs in the wall of the small intestine, and those eggs hatch while still inside the gut. As a result, it is the hatched first-stage larvae, called rhabditiform larvae, that are passed in the stool, not eggs. This is different from hookworm and \u003Cem>Ascaris\u003C\u002Fem>, which are detected as eggs, and it is one of the most reliable features for identifying \u003Cem>Strongyloides\u003C\u002Fem> in the laboratory.\u003C\u002Fp>",{"question":53,"answer":54},"\u003Cp>What is autoinfection in \u003Cem>Strongyloides\u003C\u002Fem> and why does it matter?\u003C\u002Fp>","\u003Cp>Autoinfection is the ability of the parasite to reinfect the same host from within. Some larvae in the intestine transform into the infective stage and re-enter the body through the intestinal wall or the skin around the anus, without ever leaving the host. This means a single infection can persist and even multiply for decades with no new exposure, and it is the reason the infection can escalate to a life-threatening level when immunity is suppressed.\u003C\u002Fp>",{"question":56,"answer":57},"\u003Cp>Why is \u003Cem>Strongyloides\u003C\u002Fem> dangerous in people taking steroids?\u003C\u002Fp>","\u003Cp>Corticosteroids suppress the immune response that normally keeps autoinfection slow. When they are given to a person with an unrecognized chronic infection, autoinfection accelerates, larvae multiply and spread through the lungs, gut, and other organs, and they carry gut bacteria into the bloodstream. This is called hyperinfection, and it is often fatal. Because of this, screening for \u003Cem>Strongyloides\u003C\u002Fem> is recommended before starting steroids or other immunosuppression in anyone who may have been exposed.\u003C\u002Fp>",{"question":59,"answer":60},"\u003Cp>Can one negative stool test rule out \u003Cem>Strongyloides\u003C\u002Fem>?\u003C\u002Fp>","\u003Cp>No. Larvae are shed in small numbers and irregularly, so a single stool examination misses many infections. Reliable diagnosis requires examining several stool samples, using a larval-recovery method such as the Baermann technique or agar plate culture, or using a blood antibody test. A single negative stool should never be used to exclude the infection, especially before giving steroids.\u003C\u002Fp>",{"question":62,"answer":63},"\u003Cp>How is strongyloidiasis treated?\u003C\u002Fp>","\u003Cp>The drug of choice is ivermectin, with albendazole as a less effective alternative. Because the parasite sustains itself through autoinfection, the goal is complete eradication rather than simply reducing the number of worms, and cure should be confirmed. Hyperinfection is a medical emergency treated with ivermectin, reduction of immunosuppression where possible, and simultaneous treatment of the accompanying bacterial bloodstream infection.\u003C\u002Fp>",{"question":65,"answer":66},"\u003Cp>What is larva currens?\u003C\u002Fp>","\u003Cp>Larva currens is a fast-moving, itchy, raised track on the skin caused by larvae migrating during autoinfection, usually around the buttocks, groin, and trunk. The name means running larva, which describes how quickly the track advances. It is fairly specific to \u003Cem>Strongyloides\u003C\u002Fem> and is a visible sign that the parasite is reinfecting the host from within.\u003C\u002Fp>",[],[69,90],{"slug":70,"title":71,"description":72,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":73,"lastUpdatedDate":74,"draft":45,"category":46,"image":42,"faq":75,"tags":88},"hookworm-ancylostoma-necator","Hookworm (Ancylostoma duodenale and Necator americanus): Life Cycle, Pathogenesis, and Lab Diagnosis","Why does a skin-penetrating larva cause iron-deficiency anemia months later? Complete hookworm life cycle, species comparison, clinical manifestations by site, and laboratory diagnosis with exam-ready tables.","2022-08-09","2026-08-13",[76,79,82,85],{"question":77,"answer":78},"How does hookworm infection cause anemia?","\u003Cp>Adult hookworms attach to the intestinal mucosa using teeth (\u003Cem>Ancylostoma duodenale\u003C\u002Fem>) or cutting plates (\u003Cem>Necator americanus\u003C\u002Fem>) and feed directly on blood, while secreting anticoagulant proteins that prolong bleeding. This causes chronic, cumulative intestinal blood loss across the worm burden, gradually depleting iron stores and producing iron-deficiency anemia, particularly in children with smaller iron reserves and higher growth-related iron requirements.\u003C\u002Fp>",{"question":80,"answer":81},"\u003Cp>What is the difference between \u003Cem>Ancylostoma duodenale\u003C\u002Fem> and \u003Cem>Necator americanus\u003C\u002Fem>?\u003C\u002Fp>","\u003Cp>\u003Cem>Ancylostoma duodenale\u003C\u002Fem> has teeth and causes 2-10 times more blood loss per worm (10-20 mL\u002Fday) but lives only 1-2 years, while \u003Cem>Necator americanus\u003C\u002Fem> has cutting plates, causes less blood loss per worm (0.03 mL\u002Fday), but lives 3-5 years or more. \u003Cem>A. duodenale\u003C\u002Fem> can be transmitted by both skin penetration and ingestion; \u003Cem>N. americanus\u003C\u002Fem> is transmitted only by skin penetration. Their eggs and larvae are morphologically indistinguishable.\u003C\u002Fp>",{"question":83,"answer":84},"Why does hookworm infection cause respiratory symptoms?","After skin penetration, hookworm larvae travel through the bloodstream to the heart and then into the pulmonary capillaries, breaking into the alveolar spaces before migrating up the bronchial tree to be coughed up and swallowed. This pulmonary transit phase can cause bronchitis, pneumonitis, and eosinophilia, typically appearing weeks after the initial skin exposure, before the larvae reach the intestine and mature.",{"question":86,"answer":87},"How is hookworm species identified if eggs look the same?","\u003Cp>Eggs and rhabditiform larvae of \u003Cem>Ancylostoma duodenale\u003C\u002Fem> and \u003Cem>Necator americanus\u003C\u002Fem> are morphologically indistinguishable. Species identification requires examining the buccal capsule of recovered adult worms (teeth in \u003Cem>Ancylostoma\u003C\u002Fem> vs cutting plates in \u003Cem>Necator\u003C\u002Fem>), using Harada-Mori filter paper culture to rear filariform larvae for comparison, or molecular methods such as PCR.\u003C\u002Fp>",[89],"helminths",{"slug":91,"title":92,"description":93,"seoTitle":42,"seoDescription":42,"author":43,"createdDate":94,"lastUpdatedDate":95,"draft":45,"category":46,"image":42,"faq":96,"tags":109},"ascaris-lumbricoides-life-cycle-pathogenesis-and-lab-diagnosis","Ascaris lumbricoides: Life Cycle, Pathogenesis, Treatment, and Laboratory Diagnosis","Why does the world's most common worm infection cause everything from a cough to a surgical emergency? Complete Ascaris lumbricoides life cycle, the four mechanisms of disease, treatment, and egg morphology.","2022-04-11","2026-08-01",[97,100,103,106],{"question":98,"answer":99},"Why does Ascaris lumbricoides cause such different symptoms in different patients?","Ascaris pathogenesis involves four distinct mechanisms tied to different stages and locations of the worm's life cycle: host immune reactions to worm body fluids (occurring at any time), larval migration through the lungs producing allergic pulmonary symptoms (Loffler's syndrome) early in infection, mechanical effects depending on adult worm burden and location in the intestine (or elsewhere if worms migrate), and chronic nutritional deficiency from ongoing nutrient competition. A patient's presentation reflects whichever mechanism is dominant when they are examined, which is why the same organism can cause anything from no symptoms to a surgical emergency.",{"question":101,"answer":102},"Why are unfertilized Ascaris eggs harder to detect using zinc sulfate flotation?","Unfertilized Ascaris eggs are too heavy to float using the zinc sulfate flotation concentration method, despite being larger (up to 90 micrometres) than fertilized eggs (up to 75 micrometres). A patient harbouring only female worms (and therefore only unfertilized eggs) may have a falsely reassuring flotation result. Direct wet mount examination of the stool sediment can still detect these heavier eggs even when flotation misses them.",{"question":104,"answer":105},"What complications can occur if Ascaris worms migrate to the biliary or pancreatic ducts?","Adult Ascaris worms can migrate from the small intestine into the bile duct or pancreatic duct via the ampulla of Vater, causing biliary colic, cholangitis, acute pancreatitis, or obstructive jaundice. Notably, a single dose of albendazole can paradoxically worsen this situation by paralysing intestinal worms in a way that may prompt other worms to migrate toward the biliary tree. Endoscopic removal via ERCP is often preferred over anthelmintic therapy alone when biliary or pancreatic migration is suspected.",{"question":107,"answer":108},"What is the treatment for Ascaris lumbricoides infection?","Uncomplicated intestinal ascariasis is treated with albendazole (single 400mg dose), mebendazole (100mg twice daily for 3 days), or ivermectin; pyrantel pamoate is preferred in pregnant women. Partial intestinal obstruction is managed with intravenous fluids, nasogastric decompression, and antibiotics alongside anthelmintic therapy, while complete obstruction requires surgical intervention. Biliary or pancreatic ascariasis is often managed with endoscopic worm removal rather than anthelmintic therapy alone.",[89],{"enabled":111,"threads":112,"total":113},true,[],0,[115,121,128,135,141,146,152,157,163,166,173],{"slug":116,"name":43,"description":117,"image":118,"body":119,"postCount":120},"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.*",486,{"slug":122,"name":123,"description":124,"image":125,"body":126,"postCount":127},"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":129,"name":130,"description":131,"image":132,"body":133,"postCount":134},"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":136,"name":137,"description":131,"image":138,"body":139,"postCount":140},"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":142,"name":143,"description":131,"image":42,"body":144,"postCount":145},"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":147,"name":148,"description":149,"image":42,"body":150,"postCount":151},"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":153,"name":154,"description":155,"image":42,"body":42,"postCount":156},"guest-author","Guest Author","Guest Author \u002F Contributor",1,{"slug":158,"name":159,"description":131,"image":160,"body":161,"postCount":162},"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":164,"name":165,"description":155,"image":42,"body":42,"postCount":156},"dr-poonam-acharya","Dr. Poonam Acharya",{"slug":167,"name":168,"description":169,"image":170,"body":171,"postCount":172},"nisha-rijal","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":174,"name":175,"description":176,"image":177,"body":178,"postCount":156},"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.",[180,187,193,198,203,208,212,216,220,225,229,234,238,243,248,252,256,260,265,270,274,278,282,287,291,295,299,303,308,313,317,321,325,330,334,338,342,346,350,354,358,362,366,370,374,378,382,386,391,395,398,402,406,410,414,418,422,426,430,434,438,442,446,450,454,458,462,466,469,473,476,479,482,485,488,491,494,497,500,503,506,509,512],{"slug":181,"name":182,"description":183,"image":184,"body":185,"postCount":186},"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":188,"name":189,"description":190,"image":42,"body":191,"postCount":192},"microscopy","Microscopy","Microscope types, components, and microscopy techniques","These are list of blog posts related to microscopy. ",12,{"slug":194,"name":195,"description":196,"image":42,"body":42,"postCount":197},"gram-positive-cocci","Gram-Positive Cocci","Staphylococcus, Streptococcus, Enterococcus, Micrococcus — organisms, diseases, and identification tests",11,{"slug":199,"name":200,"description":201,"image":42,"body":42,"postCount":202},"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":204,"name":205,"description":206,"image":42,"body":42,"postCount":207},"gram-positive-rods","Gram-Positive Rods","Bacillus, Clostridium, Listeria, Corynebacterium, Actinomyces and related organisms",8,{"slug":209,"name":210,"description":211,"image":42,"body":42,"postCount":197},"mycobacteria","Mycobacteria","Mycobacterium tuberculosis, leprosy, atypical mycobacteria, and acid-fast organism diagnosis",{"slug":213,"name":214,"description":215,"image":42,"body":42,"postCount":192},"anaerobic-bacteriology","Anaerobic Bacteriology","Anaerobic organisms, anaerobic culture methods, and anaerobic infection diagnosis",{"slug":217,"name":218,"description":219,"image":42,"body":42,"postCount":192},"enterobacteriaceae","Enterobacteriaceae","Identification, differentiation, and clinical significance of Enterobacteriaceae family members",{"slug":221,"name":222,"description":223,"image":42,"body":42,"postCount":224},"spirochetes","Spirochetes","Treponema, Leptospira, Borrelia and spirochetal infections",7,{"slug":226,"name":227,"description":228,"image":42,"body":42,"postCount":186},"food-microbiology","Food Microbiology","Food-borne pathogens, food safety, spoilage, and preservation",{"slug":230,"name":231,"description":232,"image":42,"body":42,"postCount":233},"antimicrobial-susceptibility-testing","Antimicrobial Susceptibility Testing","Methods for testing antibiotic susceptibility in clinical microbiology",21,{"slug":235,"name":236,"description":237,"image":42,"body":42,"postCount":186},"antimicrobials-moa-amr","Antimicrobials (MOA & AMR)","Mechanisms, detection, and clinical significance of antimicrobial resistance",{"slug":239,"name":240,"description":241,"image":42,"body":42,"postCount":242},"sterilization-disinfection","Sterilization and Disinfection","Methods of sterilization and disinfection in healthcare and laboratory settings",10,{"slug":244,"name":245,"description":246,"image":42,"body":42,"postCount":247},"specimen-collection-transport","Specimen Collection and Transport","Collection, handling, and transport of clinical specimens for microbiological testing",27,{"slug":249,"name":250,"description":251,"image":42,"body":42,"postCount":233},"bacterial-structure-physiology","Bacterial Structure and Physiology","Bacterial cell structure, growth, physiology, and environmental factors affecting growth",{"slug":253,"name":254,"description":42,"image":42,"body":255,"postCount":145},"horizontal-gene-transfer","Horizontal Gene Transfer","Articles related to **Horizontal Gene Transfer**",{"slug":257,"name":258,"description":42,"image":42,"body":259,"postCount":242},"chromatography","Chromatography","Information about chromatographic techniques.",{"slug":261,"name":262,"description":263,"image":42,"body":264,"postCount":224},"electrophoresis","Electrophoresis","Information about Electrophoresis Techniques ","Detailed information  about Electrophoresis Techniques ",{"slug":266,"name":267,"description":268,"image":42,"body":269,"postCount":145},"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":271,"name":272,"description":273,"image":42,"body":42,"postCount":145},"bacteriophage","Bacteriophage","Description about Bacteriophage.",{"slug":275,"name":276,"description":277,"image":42,"body":42,"postCount":145},"malaria","Malaria","It is the collections of articles regarding malarial disease. ",{"slug":279,"name":280,"description":281,"image":42,"body":42,"postCount":145},"anaerobic-culture-techniques","Anaerobic Culture Techniques","Posts related with Anaerobic Culture Techniques.",{"slug":283,"name":284,"description":285,"image":42,"body":42,"postCount":286},"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":288,"name":289,"description":290,"image":42,"body":42,"postCount":224},"biosafety-levels","Biosafety levels ","Articles related to Biosafety Levels",{"slug":292,"name":293,"description":294,"image":42,"body":42,"postCount":202},"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":296,"name":297,"description":298,"image":42,"body":42,"postCount":145},"pipette","Pipette","Posts related with Pipette. ",{"slug":300,"name":301,"description":302,"image":42,"body":42,"postCount":224},"bacteriology-mcqs","Bacteriology MCQs","This sections lists MCQs in Bacteriology.",{"slug":304,"name":305,"description":306,"image":42,"body":42,"postCount":307},"parasitology-mcqs","Parasitology MCQs","This section lists MCQs in Parasitology.",2,{"slug":309,"name":310,"description":311,"image":42,"body":42,"postCount":312},"virology-mcqs","Virology MCQs","This is the collections of Multiple Choice Questions in Virology.",4,{"slug":314,"name":315,"description":316,"image":42,"body":42,"postCount":202},"mcqs-in-microbiology","MCQs in Microbiology","This section lists the collections of Multiple Choice Questions in General Microbiology Topics. ",{"slug":318,"name":319,"description":320,"image":42,"body":42,"postCount":207},"immunology-mcqs","Immunology MCQs","In this section; we are posting collections of Multiple Choice Questions about Immunology. ",{"slug":322,"name":323,"description":324,"image":42,"body":42,"postCount":242},"microbial-curiosities","Microbial Curiosities","In this clusters, we are posting interesting and unique information about Microorganisms. ",{"slug":326,"name":327,"description":328,"image":42,"body":42,"postCount":329},"bacterial-culture-media","Bacterial Culture Media","Posts related to Bacterial Culture Media. ",23,{"slug":331,"name":332,"description":333,"image":42,"body":42,"postCount":145},"fungal-culture-media","Fungal Culture Media","Posts related to Fungal Culture Media.",{"slug":335,"name":336,"description":337,"image":42,"body":42,"postCount":202},"motility-test","Motility Test","This lists the procedure regarding various tests methods for bacterial motility.",{"slug":339,"name":340,"description":341,"image":42,"body":42,"postCount":242},"bacterial-enumeration","Bacterial enumeration","These posts are related to isolation and enumeration of bacteria. ",{"slug":343,"name":344,"description":345,"image":42,"body":42,"postCount":307},"gram-positive-coccobacillus","Gram-positive coccobacillus","List of Gram Positive Coccobacilli",{"slug":347,"name":348,"description":349,"image":42,"body":42,"postCount":312},"dimorphic-fungi","Dimorphic Fungi","This is about various dimorphic fungi. ",{"slug":351,"name":352,"description":353,"image":42,"body":42,"postCount":224},"bacterial-classification","Bacterial Classification","These posts are related with various approaches used for the classification of Bacteria. ",{"slug":355,"name":356,"description":357,"image":42,"body":42,"postCount":202},"immunofluorescence","Immunofluorescence ","Various Tests related to Immunofluorescence ",{"slug":359,"name":360,"description":361,"image":42,"body":42,"postCount":151},"antibody-mediated-immunity","Antibody-mediated Immunity","This clusters links the articles that are sharing insights about Antibody-mediated immunity. ",{"slug":363,"name":364,"description":365,"image":42,"body":42,"postCount":224},"hypersensitivity","Hypersensitivity","Articles related to Hypersensitivity.",{"slug":367,"name":368,"description":42,"image":42,"body":42,"postCount":369},"haemophilus","Haemophilus",3,{"slug":371,"name":372,"description":373,"image":42,"body":42,"postCount":312},"sexually-transmitted-infections-stis","Sexually transmitted infections (STIs)","This is the clusters of infections that are transmitted sexually. ",{"slug":375,"name":376,"description":377,"image":42,"body":42,"postCount":192},"adaptive-immunity","Adaptive Immunity","Blog posts related to B Cell Immunity and T Cell Immunity.",{"slug":379,"name":380,"description":381,"image":42,"body":42,"postCount":186},"fungal-diagnostics","Fungal Diagnostics","Various methods used for the Diagnosis of Fungal Infections. ",{"slug":383,"name":384,"description":385,"image":42,"body":42,"postCount":202},"laboratory-storage-and-preservation","Laboratory Storage and Preservation","Articles about Laboratory Storage of Antimicrobial Disk, Test organisms and Equipment used for this process. ",{"slug":387,"name":388,"description":389,"image":42,"body":390,"postCount":145},"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":392,"name":393,"description":394,"image":42,"body":42,"postCount":151},"laboratory-glassware","Laboratory Glassware","Posts about Laboratory Glassware. ",{"slug":89,"name":396,"description":397,"image":42,"body":42,"postCount":145},"Helminths","In this section, we are covering properties, life cycle, pathogenesis and laboratory diagnosis of Helminths\u002FHelminthic infestations. ",{"slug":399,"name":400,"description":401,"image":42,"body":42,"postCount":207},"protozoan-parasite","Protozoan Parasite","In this cluster, we are covering protozoan parasites. ",{"slug":403,"name":404,"description":405,"image":42,"body":42,"postCount":156},"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":407,"name":408,"description":409,"image":42,"body":42,"postCount":242},"bacterial-staining-technique","Bacterial Staining Technique","Lists of various staining techniques that are used to stain bacteria. ",{"slug":411,"name":412,"description":413,"image":42,"body":42,"postCount":233},"enzyme-tests","Enzyme Tests","\u003Cp>Various Biochemical Test that are based on enzymatic activity of the microorganisms. \u003C\u002Fp>",{"slug":415,"name":416,"description":417,"image":42,"body":42,"postCount":197},"carbohydrate-utilization","Carbohydrate Utilization","\u003Cp>Various biochemical tests which are related to Carbohydrate fermentation or Utilization\u003C\u002Fp>",{"slug":419,"name":420,"description":421,"image":42,"body":42,"postCount":202},"susceptibility-based-id","Susceptibility-based ID","\u003Cp>These are susceptibility based identification test such as optochin sensitivity, bacitracin sensitivity etc. \u003C\u002Fp>",{"slug":423,"name":424,"description":425,"image":42,"body":42,"postCount":312},"microbial-metabolism","Microbial Metabolism","\u003Cp>Tests about Microbial Metabolism. \u003C\u002Fp>",{"slug":427,"name":428,"description":429,"image":42,"body":42,"postCount":207},"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":431,"name":432,"description":433,"image":42,"body":42,"postCount":369},"atypical-pneumonia","Atypical Pneumonia","\u003Cp>Organisms responsible for Atypical Pneumonia. \u003C\u002Fp>",{"slug":435,"name":436,"description":437,"image":42,"body":42,"postCount":202},"antigen","Antigen","\u003Cp>Various articles related to Antigens.\u003C\u002Fp>",{"slug":439,"name":440,"description":441,"image":42,"body":42,"postCount":224},"innate-immunity","Innate Immunity","\u003Cp>Articles related to Innate Immunity. \u003C\u002Fp>",{"slug":443,"name":444,"description":445,"image":42,"body":42,"postCount":312},"respiratory-tract-infection","Respiratory Tract Infection","\u003Cp>In this cluster, you can see various etiological agents that causes respiratory tract infection. \u003C\u002Fp>",{"slug":447,"name":448,"description":449,"image":42,"body":42,"postCount":202},"torch-infection","TORCH Infection","\u003Cp>In this section; you can find articles related with TOCH infection. \u003C\u002Fp>",{"slug":451,"name":452,"description":453,"image":42,"body":42,"postCount":207},"microbiology-for-beginners","Microbiology for Beginners","\u003Cp>These articles are very basic articles, which will share general concepts in Microbiology. \u003C\u002Fp>",{"slug":455,"name":456,"description":457,"image":42,"body":42,"postCount":145},"dna-replication","DNA Replication","\u003Cp>Articles related to DNA and Replication of DNA. \u003C\u002Fp>",{"slug":459,"name":460,"description":461,"image":42,"body":42,"postCount":224},"genetic-code","Genetic Code","\u003Cp>Articles related to Genetic Code.\u003C\u002Fp>",{"slug":463,"name":464,"description":465,"image":42,"body":42,"postCount":224},"molecular-technique","Molecular Technique","\u003Cp>Posts related to Molecular Techniques. \u003C\u002Fp>",{"slug":467,"name":468,"description":42,"image":42,"body":42,"postCount":156},"colorimetric-assay","Colorimetric Assay ",{"slug":470,"name":471,"description":472,"image":42,"body":42,"postCount":202},"pharmaceutical-microbiology","Pharmaceutical Microbiology","\u003Cp>Various articles related to Pharmaceutical Microbiology\u003C\u002Fp>",{"slug":474,"name":475,"description":42,"image":42,"body":42,"postCount":369},"blood-and-immune-cells","Blood and Immune Cells",{"slug":477,"name":478,"description":42,"image":42,"body":42,"postCount":202},"host-pathogen-interaction","Host Pathogen Interaction",{"slug":480,"name":481,"description":42,"image":42,"body":42,"postCount":312},"blood-culture","Blood Culture",{"slug":483,"name":484,"description":42,"image":42,"body":42,"postCount":312},"environmental-microbiology","Environmental microbiology ",{"slug":486,"name":487,"description":42,"image":42,"body":42,"postCount":224},"copromicroscopic-technique","Copromicroscopic Technique",{"slug":489,"name":490,"description":42,"image":42,"body":42,"postCount":369},"quality-control","Quality Control",{"slug":492,"name":493,"description":42,"image":42,"body":42,"postCount":224},"dermatophytes","Dermatophytes",{"slug":495,"name":496,"description":42,"image":42,"body":42,"postCount":369},"viral-hemorrhagic-fevers","Viral Hemorrhagic Fevers",{"slug":498,"name":499,"description":42,"image":42,"body":42,"postCount":312},"h2s-production","H2S Production",{"slug":501,"name":502,"description":42,"image":42,"body":42,"postCount":307},"water-quality-testing","Water Quality Testing",{"slug":504,"name":505,"description":42,"image":42,"body":42,"postCount":202},"virology-basics","Virology basics",{"slug":507,"name":508,"description":42,"image":42,"body":42,"postCount":312},"typing-methods","Typing Methods",{"slug":510,"name":511,"description":42,"image":42,"body":42,"postCount":369},"blotting-technique","Blotting Technique",{"slug":513,"name":514,"description":42,"image":42,"body":42,"postCount":312},"history-microbiology","History of Microbiology"]