[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fxLN3MUwXCdr5RPjwZYIDpOj8CHyjOmngWTgoKXPtZbg":3,"$fqb4EAMtQnUmtQ5ml8PRbA8SvnaJDw3YPb4YpTCh4ZTw":36,"$f3Ft0rKFJHppdzE-vuveecxx1BUcg9iOlMLtyzf_MJDg":85,"$fucxFBm2ZjZfGSdmdRaSNGBI_F0jJme4f0GTvzUhQfL8":149},[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":44,"draft":45,"category":46,"image":42,"body":47,"faq":48,"commentsClosed":45,"tags":49,"related":51,"comments":81},"types-of-tinea-ringworm-infections","Types of Tinea (Ringworm): Sites, Causes, and Clinical Features","\u003Cp>The tinea infections explained by site: tinea capitis, corporis, pedis, cruris, unguium, and more. Common organisms, clinical features, and how the site names work.\u003C\u002Fp>",null,"Acharya Tankeshwar","2026-08-21",false,"mycology","A medical student on a dermatology rotation sees three patients in one morning: an itchy ring on a wrestler's shoulder, a boy with a scaly bald patch and broken hairs on his scalp, and an adult with peeling, cracked skin between the toes. All three are ringworm. All three are the same kind of organism, a dermatophyte. Yet each has a different name, a different likely species, and a different treatment.\n\nThis is the logic of tinea naming, and once it clicks the whole topic becomes easy. Tinea infections are named for the body site, not the fungus. The species that causes the ring on the shoulder can be the same one causing the peeling between the toes.\n\nThis article walks through each tinea infection by site: what it looks like, which organisms usually cause it, and how treatment differs. For how the laboratory identifies the fungus once a specimen arrives, see the companion article: [Dermatophytes: Lab Diagnosis and How to Tell the Three Genera Apart](https:\u002F\u002Fmicrobeonline.com\u002Fdermatophytes-tinea-and-lab-diagnosis\u002F).\n\n## What \"tinea\" means\n\nTinea is the medical name for a dermatophyte infection of the skin, hair, or nails. The everyday word is ringworm, which is misleading because no worm is involved. The name comes from the ring-shaped lesion many of these infections produce: a raised, scaly, advancing border with clearer skin in the center, formed as the fungus spreads outward from where it first landed.\n\nThe three genera of dermatophytes, *Trichophyton*, *Microsporum*, and *Epidermophyton*, all live on keratin, the tough protein in skin, hair, and nails. The clinical name of the infection depends only on where on the body it takes hold. This is why the same species, most often *Trichophyton rubrum*, can appear under several different tinea names.\n\n## The tinea infections at a glance\n\n![fungal infection  - Tinea (ringworm)](\u002Fblogs\u002FTinea-.png)This table is the fastest way to hold the whole topic in your head. Read it site by site: where the infection is, what to call it, which organisms cause it most often, and the one feature that identifies it.\n\n| Site | Name | Common organisms | Key clinical feature |\n| --- | --- | --- | --- |\n| Scalp \u002F hair | Tinea capitis | *Trichophyton* spp., *Microsporum canis* | Scaly patches, broken hairs, black dots or bald areas; mostly in children |\n| Body (trunk, limbs) | Tinea corporis | *Trichophyton rubrum* | Classic ring: raised scaly border, central clearing |\n| Foot | Tinea pedis (athlete's foot) | *T. rubrum*, *T. mentagrophytes*, *Epidermophyton floccosum* | Scaling and cracking between the toes; itching, burning |\n| Groin | Tinea cruris (jock itch) | *T. rubrum*, *E. floccosum* | Itchy red patches in the groin folds, spreading to inner thigh |\n| Nail | Tinea unguium (onychomycosis) | *T. rubrum*, *T. mentagrophytes*, *E. floccosum* | Thick, discolored, crumbling nail |\n| Beard \u002F mustache | Tinea barbae | *T. verrucosum*, *T. mentagrophytes* | Scaly patches with pustules in the beard area; adult men |\n| Hand \u002F palm | Tinea manuum | *T. rubrum*, *T. mentagrophytes*, *E. floccosum* | Dry scaling of the palm, often with tinea pedis (\"two feet, one hand\") |\n| Face (non-beard) | Tinea faciei | *T. rubrum*, *M. canis* | Ring lesions on the face; may lack the classic ring |\n\nA pattern worth noticing right away: *Trichophyton rubrum* appears in almost every row. It is the single most common dermatophyte worldwide, and it infects skin, nails, and (less often) hair, which is why one species turns up under so many names.\n\n## Tinea capitis (scalp ringworm)\n\nTinea capitis is a dermatophyte infection of the scalp and hair shafts, seen mainly in children. It is caused by *Trichophyton* species and *Microsporum canis*. The fungus grows down into the keratinized wall of the hair follicle and along the hair shaft, so the infection damages hair as well as skin. Infected hairs look dull and grey and break easily.\n\nTinea capitis takes two broad forms, and the difference matters clinically because the inflammatory forms can scar.\n\n**Non-inflammatory forms** are more common and cause little or no swelling:\n\n- **Black dot type.** The fungus grows inside the hair shaft (endothrix invasion), which weakens the hair so it snaps off right at the scalp surface. Each broken hair leaves a small black dot in a patch of otherwise smooth scalp. It is usually caused by *T. tonsurans* and *T. violaceum*.\n- **Grey patch type.** Round, scaly patches with dull grey hairs, classically caused by *Microsporum* species. These often fluoresce under a Wood's lamp.\n- **Seborrheic type.** Diffuse scaling that resembles dandruff, which can delay diagnosis.\n\n**Inflammatory forms** cause swelling and can lead to permanent hair loss:\n\n- **Kerion.** A severe, boggy, pus-discharging swelling of the scalp, often with tender lymph nodes. It is an inflammatory reaction to the fungus, usually a zoophilic species (*T. verrucosum*, *T. mentagrophytes*). Kerion can scar and cause permanent bald patches if not treated promptly. In children, kerion celsi is one of the common severe presentations.\n- **Favus.** A chronic form caused by *T. schoenleinii*, producing cup-shaped yellow crusts (scutula) around the hair follicles that give a honeycomb appearance (the Latin *favus* means honeycomb). It can lead to scarring alopecia.\n\nBecause tinea capitis involves the hair shaft, it needs oral antifungal treatment; topical creams cannot reach the fungus inside the follicle.\n\n## Tinea corporis (body ringworm)\n\nTinea corporis is the infection of the glabrous (non-hairy) skin of the trunk and limbs. It is most often caused by *Trichophyton rubrum*. This is the textbook ringworm: one or more ring-shaped lesions with a raised, red, scaly, advancing edge and a clearer center. Lesions may be single, multiple, or run together (confluent).\n\nIt spreads readily by skin-to-skin contact, which is why outbreaks are common among wrestlers and other contact-sport athletes (where it is sometimes called tinea corporis gladiatorum). Most cases respond to topical antifungal treatment.\n\n## Tinea pedis (athlete's foot)\n\nTinea pedis is a dermatophyte infection of the feet and toe webs. It is the most common dermatophyte infection in adults, favored by the warm, moist environment inside shoes. The main organisms are *T. rubrum*, *T. mentagrophytes*, and *Epidermophyton floccosum*.\n\n**It presents in several patterns:**\n\n- **Interdigital.** The most common form. Scaling, cracking (fissuring), and softening (maceration) of the skin between the toes, with itching and burning. The macerated skin can crack and let bacteria in, causing secondary infection.\n- **Moccasin (hyperkeratotic).** Chronic dry scaling covering the sole and sides of the foot in the distribution of a moccasin. Often caused by *T. rubrum*. When it also involves one hand, it produces the \"two feet, one hand\" pattern.\n- **Vesicular.** Fluid-filled blisters, usually on the sole.\n- **Ulcerative.** The most severe form, with breakdown of the skin, often complicated by bacterial infection.\n\nInterdigital and mild cases respond to topical treatment; chronic moccasin-type disease often needs oral antifungals.\n\n## Tinea cruris (jock itch)\n\nTinea cruris is the infection of the groin, upper inner thighs, and skin folds. It is common in adult men, favored by warmth and moisture, and is often accompanied by tinea pedis (the patient reinfects the groin from the feet). The usual organisms are *T. rubrum* and *Epidermophyton floccosum*.\n\nIt appears as itchy, red-brown patches with a raised scaly border, spreading outward from the groin fold onto the inner thigh. The scrotum is usually spared, which helps distinguish it from candidal infection, where the scrotum is typically involved. Most cases respond to topical treatment, along with keeping the area dry and treating any coexisting tinea pedis.\n\n## Tinea unguium (onychomycosis)\n\nTinea unguium is the dermatophyte infection of the nail, part of the broader term onychomycosis (fungal nail infection from any cause). It is most often caused by *T. rubrum*, and less often by *T. mentagrophytes* and *Epidermophyton floccosum*. Toenails are affected far more often than fingernails.\n\nThe infected nail becomes thickened, discolored (yellow-white or brown), and friable, meaning it crumbles easily. The nail may lift away from the nail bed. Because the fungus lives deep within the nail plate, topical treatment alone rarely cures it. Oral antifungals such as terbinafine and itraconazole are the mainstay, and treatment is long because the nail must grow out.\n\n## Tinea barbae\n\nTinea barbae is ringworm of the beard and mustache area, seen in adult men. It is also called barber's itch. The usual organisms are the zoophilic species *T. verrucosum* and *T. mentagrophytes*, often acquired from animals, which is why it is more common in farm and rural settings. It produces red, scaly patches with brittle, lusterless hairs and a tendency to pustular folliculitis. *Microsporum canis* and *T. rubrum* are found occasionally. Like other hair-involving infections, it usually needs oral treatment.\n\n## Tinea manuum\n\nTinea manuum is ringworm of the hand and palm, caused by *T. rubrum*, *T. mentagrophytes*, and *Epidermophyton floccosum*. It typically shows as dry, fine scaling of the palm and is classically one-sided. It often coexists with tinea pedis in the \"two feet, one hand\" pattern, where both feet and a single hand are involved.\n\n## How treatment differs by site\n\nThe single most useful treatment rule follows directly from anatomy: whether the fungus is in skin only, or in hair or nail.\n\n- **Skin-only infections** (most tinea corporis, cruris, interdigital pedis, manuum) usually respond to **topical** antifungals: azole creams, terbinafine, ciclopirox, or amorolfine.\n- **Hair and nail infections** (tinea capitis, barbae, unguium, and severe or extensive skin disease) need **oral** antifungals, because topical agents cannot reach the fungus inside the hair follicle or nail plate. Oral options include terbinafine, itraconazole, and griseofulvin. Terbinafine and itraconazole have largely replaced griseofulvin for nail infections because of better cure rates and shorter courses.\n\nConfirming the organism by laboratory testing matters most before starting a long oral course, since these are given for weeks to months. The diagnostic workup is covered in the [dermatophytes lab diagnosis article](https:\u002F\u002Fmicrobeonline.com\u002Fdermatophytes-tinea-and-lab-diagnosis\u002F).\n\n## Prevention and control\n\n- Do not share combs, brushes, hats, or towels, and disinfect barbershop instruments (combs, brushes, scissors).\n- Disinfect clothing, towels, and bedding after use, as tinea corporis and cruris spread this way.\n- Keep skin folds and feet dry; good foot hygiene and dry footwear reduce tinea pedis.\n- Treat tinea pedis to prevent it seeding tinea cruris or tinea manuum in the same person.\n- Examine and treat infected pets, a common source of *Microsporum canis* tinea capitis and corporis in children.\n\n## How to Remember\n\n**The name is the place, not the fungus.** Every tinea name is Latin for a body region: capitis (head), corporis (body), pedis (foot), cruris (leg\u002Fgroin), unguium (nail), barbae (beard), manuum (hand), faciei (face). Learn the sites and the \"which organism\" question becomes secondary, because *T. rubrum* causes most of them anyway.\n\n**Topical for skin, oral for hair and nail.** The one treatment rule that carries the most exam weight. If hair or nail is involved, a cream will not reach the fungus, so the answer is oral.\n\n**Black dots mean inside the hair.** In tinea capitis, black dots come from endothrix invasion: the fungus grows inside the shaft, weakens it, and the hair snaps at the scalp. \"Endo, ends at the scalp.\"\n\n**Two feet, one hand.** Tinea pedis on both feet plus tinea manuum on one hand is a recognized pattern, worth remembering because the asymmetry (why one hand?) is a classic exam prompt.\n\n## Key exam facts\n\n| Fact | Detail |\n| --- | --- |\n| Tinea = | Dermatophyte infection of skin, hair, or nail (= ringworm) |\n| Named for | The body site, not the organism |\n| Most common cause overall | *Trichophyton rubrum* |\n| Most common cause of tinea capitis | *Trichophyton* spp. and *Microsporum canis* |\n| Most common cause of tinea unguium | *Trichophyton rubrum* |\n| Kerion | Severe inflammatory tinea capitis; can scar; zoophilic species |\n| Favus | *T. schoenleinii*; honeycomb yellow crusts (scutula) |\n| Black dot tinea capitis | Endothrix invasion; *T. tonsurans*, *T. violaceum* |\n| Two feet, one hand | Tinea pedis (both feet) + tinea manuum (one hand) |\n| Topical treatment | Skin-only disease (corporis, cruris, most pedis) |\n| Oral treatment | Hair and nail disease (capitis, barbae, unguium) |\n| Scrotum spared | Helps distinguish tinea cruris from candidiasis |\n\n## Where Students Get Confused\n\n**Tinea versicolor is not a true tinea.** Despite the name, tinea versicolor (pityriasis versicolor) is not caused by a dermatophyte. It is caused by *Malassezia*, a yeast, and behaves differently. It is grouped here only to warn against the naming trap: the word \"tinea\" in \"tinea versicolor\" is historical and misleading.\n\n**The tinea name does not name the fungus.** Tinea corporis and tinea pedis can be caused by the same species (*T. rubrum*). The name tells you the site; only the laboratory tells you the organism.\n\n**Ringworm has no worm.** The name comes from the ring-shaped lesion with central clearing, not from any parasite. It is entirely fungal.\n\n**Onychomycosis and tinea unguium are not exact synonyms.** Tinea unguium means a nail infection caused specifically by a dermatophyte. Onychomycosis is the broader term for any fungal nail infection, including those caused by non-dermatophyte molds and yeasts. All tinea unguium is onychomycosis, but not all onychomycosis is tinea unguium.\n\n**Kerion is a reaction, not a separate organism.** A kerion is the host's strong inflammatory response to a scalp dermatophyte, not a different fungus. It looks like a bacterial abscess but is fungal, so incising and draining it as if it were a bacterial abscess is a mistake.\n\n**References**\n\n- Chander J. Textbook of Medical Mycology. 4th ed. Jaypee Brothers Medical Publishers; 2018.\n- Tille PM. Bailey and Scott's Diagnostic Microbiology. 15th ed. Elsevier; 2022.\n- Procop GW, Church DL, Hall GS, et al. Koneman's Color Atlas and Textbook of Diagnostic Microbiology. 7th ed. Wolters Kluwer; 2017.\n- Hay RJ. Tinea capitis: current status. Mycopathologia. 2017;182(1-2):87-93. \u003Chttps:\u002F\u002Fdoi.org\u002F10.1007\u002Fs11046-016-0058-8>",[],[50],"dermatophytes",[52],{"slug":53,"title":54,"description":55,"seoTitle":42,"seoDescription":42,"author":56,"createdDate":57,"lastUpdatedDate":44,"draft":45,"category":46,"image":42,"faq":58,"tags":80},"dermatophytes-tinea-and-lab-diagnosis","Dermatophytes: Lab Diagnosis and How to Tell the Three Genera Apart","\u003Cp>How the laboratory identifies dermatophytes: KOH microscopy, SDA culture, Wood's lamp, and the differential tests that separate look-alike \u003Cem>Trichophyton, Microsporum\u003C\u002Fem>, and \u003Cem>Epidermophyton\u003C\u002Fem> species.\u003C\u002Fp>","Sushmita Baniya","2022-08-21",[59,62,65,68,71,74,77],{"question":60,"answer":61},"\u003Cp>What are dermatophytes?\u003C\u002Fp>","\u003Cp>Dermatophytes are a group of fungi that feed on keratin, the tough protein found in skin, hair, and nails. They cause the skin infections known as tinea or ringworm. The three medically important genera are \u003Cem>Trichophyton\u003C\u002Fem>, \u003Cem>Microsporum\u003C\u002Fem>, and \u003Cem>Epidermophyton\u003C\u002Fem>.\u003C\u002Fp>",{"question":63,"answer":64},"\u003Cp>What is the difference between dermatophytes and dermatophytosis?\u003C\u002Fp>","\u003Cp>Dermatophytes are the fungi. Dermatophytosis is the infection they cause. Dermatophytosis is also called tinea or ringworm, and it is named by body site, such as tinea capitis on the scalp or tinea pedis on the feet.\u003C\u002Fp>",{"question":66,"answer":67},"\u003Cp>How are the three dermatophyte genera different?\u003C\u002Fp>","\u003Cp>They differ in which tissue they invade. \u003Cem>Trichophyton\u003C\u002Fem> infects skin, hair, and nails. \u003Cem>Epidermophyton\u003C\u002Fem> infects skin and nails but not hair. \u003Cem>Microsporum\u003C\u002Fem> infects skin and hair but not nails. The tissue involved is often the first clue to the genus.\u003C\u002Fp>",{"question":69,"answer":70},"\u003Cp>How are dermatophyte infections diagnosed in the laboratory?\u003C\u002Fp>","\u003Cp>The main steps are a KOH wet mount of skin, hair, or nail to look for fungal elements, followed by culture on Sabouraud dextrose agar to grow and identify the fungus. Colony appearance and the shape of macroconidia and microconidia under lactophenol cotton blue identify the genus, and differential tests separate similar species.\u003C\u002Fp>",{"question":72,"answer":73},"\u003Cp>How do you tell Trichophyton rubrum from Trichophyton mentagrophytes?\u003C\u002Fp>","\u003Cp>By a small set of tests that agree with each other. \u003Cem>T. mentagrophytes\u003C\u002Fem> perforates hair in the hair perforation test and hydrolyzes urea (urease positive). \u003Cem>T. rubrum\u003C\u002Fem> does neither and instead shows a deep red pigment on the reverse of the colony.\u003C\u002Fp>",{"question":75,"answer":76},"\u003Cp>Why does ringworm form a ring?\u003C\u002Fp>","\u003Cp>The fungus grows outward from the point where it started, spreading in a circle through the outer skin. The active edge advances while the center begins to clear, which produces the ring shape with a raised border. There is no worm involved.\u003C\u002Fp>",{"question":78,"answer":79},"\u003Cp>Does a negative Wood's lamp rule out a fungal infection?\u003C\u002Fp>","\u003Cp>No. Only some dermatophytes fluoresce under Wood's lamp, mainly certain \u003Cem>Microsporum\u003C\u002Fem> species on the scalp. Most \u003Cem>Trichophyton\u003C\u002Fem> species do not fluoresce, so a negative result does not exclude tinea. KOH microscopy and culture are still needed.\u003C\u002Fp>",[50],{"enabled":82,"threads":83,"total":84},true,[],0,[86,92,99,105,111,116,122,127,133,136,143],{"slug":87,"name":43,"description":88,"image":89,"body":90,"postCount":91},"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.*",476,{"slug":93,"name":94,"description":95,"image":96,"body":97,"postCount":98},"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":100,"name":56,"description":101,"image":102,"body":103,"postCount":104},"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":106,"name":107,"description":101,"image":108,"body":109,"postCount":110},"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":112,"name":113,"description":101,"image":42,"body":114,"postCount":115},"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":117,"name":118,"description":119,"image":42,"body":120,"postCount":121},"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":123,"name":124,"description":125,"image":42,"body":42,"postCount":126},"guest-author","Guest Author","Guest Author \u002F Contributor",1,{"slug":128,"name":129,"description":101,"image":130,"body":131,"postCount":132},"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":134,"name":135,"description":125,"image":42,"body":42,"postCount":126},"dr-poonam-acharya","Dr. Poonam Acharya",{"slug":137,"name":138,"description":139,"image":140,"body":141,"postCount":142},"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":144,"name":145,"description":146,"image":147,"body":148,"postCount":126},"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.",[150,157,163,168,173,178,182,186,190,195,199,204,208,213,218,222,226,230,235,240,244,248,252,257,261,265,269,273,278,283,287,291,295,299,303,307,311,315,319,323,327,331,335,339,343,347,351,355,360,364,368,372,376,380,384,388,392,396,400,404,408,412,416,420,424,428,432,436,439,443,446,449,452,455,458,461],{"slug":151,"name":152,"description":153,"image":154,"body":155,"postCount":156},"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":158,"name":159,"description":160,"image":42,"body":161,"postCount":162},"microscopy","Microscopy","Microscope types, components, and microscopy techniques","These are list of blog posts related to microscopy. ",12,{"slug":164,"name":165,"description":166,"image":42,"body":42,"postCount":167},"gram-positive-cocci","Gram-Positive Cocci","Staphylococcus, Streptococcus, Enterococcus, Micrococcus — organisms, diseases, and identification tests",11,{"slug":169,"name":170,"description":171,"image":42,"body":42,"postCount":172},"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":174,"name":175,"description":176,"image":42,"body":42,"postCount":177},"gram-positive-rods","Gram-Positive Rods","Bacillus, Clostridium, Listeria, Corynebacterium, Actinomyces and related organisms",8,{"slug":179,"name":180,"description":181,"image":42,"body":42,"postCount":167},"mycobacteria","Mycobacteria","Mycobacterium tuberculosis, leprosy, atypical mycobacteria, and acid-fast organism diagnosis",{"slug":183,"name":184,"description":185,"image":42,"body":42,"postCount":167},"anaerobic-bacteriology","Anaerobic Bacteriology","Anaerobic organisms, anaerobic culture methods, and anaerobic infection diagnosis",{"slug":187,"name":188,"description":189,"image":42,"body":42,"postCount":162},"enterobacteriaceae","Enterobacteriaceae","Identification, differentiation, and clinical significance of Enterobacteriaceae family members",{"slug":191,"name":192,"description":193,"image":42,"body":42,"postCount":194},"spirochetes","Spirochetes","Treponema, Leptospira, Borrelia and spirochetal infections",7,{"slug":196,"name":197,"description":198,"image":42,"body":42,"postCount":132},"food-microbiology","Food Microbiology","Food-borne pathogens, food safety, spoilage, and preservation",{"slug":200,"name":201,"description":202,"image":42,"body":42,"postCount":203},"antimicrobial-susceptibility-testing","Antimicrobial Susceptibility Testing","Methods for testing antibiotic susceptibility in clinical microbiology",21,{"slug":205,"name":206,"description":207,"image":42,"body":42,"postCount":121},"antimicrobials-moa-amr","Antimicrobials (MOA & AMR)","Mechanisms, detection, and clinical significance of antimicrobial resistance",{"slug":209,"name":210,"description":211,"image":42,"body":42,"postCount":212},"sterilization-disinfection","Sterilization and Disinfection","Methods of sterilization and disinfection in healthcare and laboratory settings",10,{"slug":214,"name":215,"description":216,"image":42,"body":42,"postCount":217},"specimen-collection-transport","Specimen Collection and Transport","Collection, handling, and transport of clinical specimens for microbiological testing",27,{"slug":219,"name":220,"description":221,"image":42,"body":42,"postCount":203},"bacterial-structure-physiology","Bacterial Structure and Physiology","Bacterial cell structure, growth, physiology, and environmental factors affecting growth",{"slug":223,"name":224,"description":42,"image":42,"body":225,"postCount":115},"horizontal-gene-transfer","Horizontal Gene Transfer","Articles related to **Horizontal Gene Transfer**",{"slug":227,"name":228,"description":42,"image":42,"body":229,"postCount":212},"chromatography","Chromatography","Information about chromatographic techniques.",{"slug":231,"name":232,"description":233,"image":42,"body":234,"postCount":194},"electrophoresis","Electrophoresis","Information about Electrophoresis Techniques ","Detailed information  about Electrophoresis Techniques ",{"slug":236,"name":237,"description":238,"image":42,"body":239,"postCount":115},"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":241,"name":242,"description":243,"image":42,"body":42,"postCount":115},"bacteriophage","Bacteriophage","Description about Bacteriophage.",{"slug":245,"name":246,"description":247,"image":42,"body":42,"postCount":115},"malaria","Malaria","It is the collections of articles regarding malarial disease. ",{"slug":249,"name":250,"description":251,"image":42,"body":42,"postCount":115},"anaerobic-culture-techniques","Anaerobic Culture Techniques","Posts related with Anaerobic Culture Techniques.",{"slug":253,"name":254,"description":255,"image":42,"body":42,"postCount":256},"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":258,"name":259,"description":260,"image":42,"body":42,"postCount":194},"biosafety-levels","Biosafety levels ","Articles related to Biosafety Levels",{"slug":262,"name":263,"description":264,"image":42,"body":42,"postCount":172},"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":266,"name":267,"description":268,"image":42,"body":42,"postCount":115},"pipette","Pipette","Posts related with Pipette. ",{"slug":270,"name":271,"description":272,"image":42,"body":42,"postCount":177},"bacteriology-mcqs","Bacteriology MCQs","This sections lists MCQs in Bacteriology.",{"slug":274,"name":275,"description":276,"image":42,"body":42,"postCount":277},"parasitology-mcqs","Parasitology MCQs","This section lists MCQs in Parasitology.",2,{"slug":279,"name":280,"description":281,"image":42,"body":42,"postCount":282},"virology-mcqs","Virology MCQs","This is the collections of Multiple Choice Questions in Virology.",4,{"slug":284,"name":285,"description":286,"image":42,"body":42,"postCount":172},"mcqs-in-microbiology","MCQs in Microbiology","This section lists the collections of Multiple Choice Questions in General Microbiology Topics. ",{"slug":288,"name":289,"description":290,"image":42,"body":42,"postCount":177},"immunology-mcqs","Immunology MCQs","In this section; we are posting collections of Multiple Choice Questions about Immunology. ",{"slug":292,"name":293,"description":294,"image":42,"body":42,"postCount":121},"microbial-curiosities","Microbial Curiosities","In this clusters, we are posting interesting and unique information about Microorganisms. ",{"slug":296,"name":297,"description":298,"image":42,"body":42,"postCount":203},"bacterial-culture-media","Bacterial Culture Media","Posts related to Bacterial Culture Media. ",{"slug":300,"name":301,"description":302,"image":42,"body":42,"postCount":115},"fungal-culture-media","Fungal Culture Media","Posts related to Fungal Culture Media.",{"slug":304,"name":305,"description":306,"image":42,"body":42,"postCount":172},"motility-test","Motility Test","This lists the procedure regarding various tests methods for bacterial motility.",{"slug":308,"name":309,"description":310,"image":42,"body":42,"postCount":212},"bacterial-enumeration","Bacterial enumeration","These posts are related to isolation and enumeration of bacteria. ",{"slug":312,"name":313,"description":314,"image":42,"body":42,"postCount":277},"gram-positive-coccobacillus","Gram-positive coccobacillus","List of Gram Positive Coccobacilli",{"slug":316,"name":317,"description":318,"image":42,"body":42,"postCount":282},"dimorphic-fungi","Dimorphic Fungi","This is about various dimorphic fungi. ",{"slug":320,"name":321,"description":322,"image":42,"body":42,"postCount":194},"bacterial-classification","Bacterial Classification","These posts are related with various approaches used for the classification of Bacteria. ",{"slug":324,"name":325,"description":326,"image":42,"body":42,"postCount":172},"immunofluorescence","Immunofluorescence ","Various Tests related to Immunofluorescence ",{"slug":328,"name":329,"description":330,"image":42,"body":42,"postCount":121},"antibody-mediated-immunity","Antibody-mediated Immunity","This clusters links the articles that are sharing insights about Antibody-mediated immunity. ",{"slug":332,"name":333,"description":334,"image":42,"body":42,"postCount":194},"hypersensitivity","Hypersensitivity","Articles related to Hypersensitivity.",{"slug":336,"name":337,"description":42,"image":42,"body":42,"postCount":338},"haemophilus","Haemophilus",3,{"slug":340,"name":341,"description":342,"image":42,"body":42,"postCount":282},"sexually-transmitted-infections-stis","Sexually transmitted infections (STIs)","This is the clusters of infections that are transmitted sexually. ",{"slug":344,"name":345,"description":346,"image":42,"body":42,"postCount":162},"adaptive-immunity","Adaptive Immunity","Blog posts related to B Cell Immunity and T Cell Immunity.",{"slug":348,"name":349,"description":350,"image":42,"body":42,"postCount":156},"fungal-diagnostics","Fungal Diagnostics","Various methods used for the Diagnosis of Fungal Infections. ",{"slug":352,"name":353,"description":354,"image":42,"body":42,"postCount":172},"laboratory-storage-and-preservation","Laboratory Storage and Preservation","Articles about Laboratory Storage of Antimicrobial Disk, Test organisms and Equipment used for this process. ",{"slug":356,"name":357,"description":358,"image":42,"body":359,"postCount":115},"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":361,"name":362,"description":363,"image":42,"body":42,"postCount":121},"laboratory-glassware","Laboratory Glassware","Posts about Laboratory Glassware. ",{"slug":365,"name":366,"description":367,"image":42,"body":42,"postCount":115},"helminths","Helminths","In this section, we are covering properties, life cycle, pathogenesis and laboratory diagnosis of Helminths\u002FHelminthic infestations. ",{"slug":369,"name":370,"description":371,"image":42,"body":42,"postCount":115},"protozoan-parasite","Protozoan Parasite","In this cluster, we are covering protozoan parasites. ",{"slug":373,"name":374,"description":375,"image":42,"body":42,"postCount":126},"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":377,"name":378,"description":379,"image":42,"body":42,"postCount":212},"bacterial-staining-technique","Bacterial Staining Technique","Lists of various staining techniques that are used to stain bacteria. ",{"slug":381,"name":382,"description":383,"image":42,"body":42,"postCount":203},"enzyme-tests","Enzyme Tests","\u003Cp>Various Biochemical Test that are based on enzymatic activity of the microorganisms. \u003C\u002Fp>",{"slug":385,"name":386,"description":387,"image":42,"body":42,"postCount":167},"carbohydrate-utilization","Carbohydrate Utilization","\u003Cp>Various biochemical tests which are related to Carbohydrate fermentation or Utilization\u003C\u002Fp>",{"slug":389,"name":390,"description":391,"image":42,"body":42,"postCount":172},"susceptibility-based-id","Susceptibility-based ID","\u003Cp>These are susceptibility based identification test such as optochin sensitivity, bacitracin sensitivity etc. \u003C\u002Fp>",{"slug":393,"name":394,"description":395,"image":42,"body":42,"postCount":282},"microbial-metabolism","Microbial Metabolism","\u003Cp>Tests about Microbial Metabolism. \u003C\u002Fp>",{"slug":397,"name":398,"description":399,"image":42,"body":42,"postCount":177},"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":401,"name":402,"description":403,"image":42,"body":42,"postCount":338},"atypical-pneumonia","Atypical Pneumonia","\u003Cp>Organisms responsible for Atypical Pneumonia. \u003C\u002Fp>",{"slug":405,"name":406,"description":407,"image":42,"body":42,"postCount":172},"antigen","Antigen","\u003Cp>Various articles related to Antigens.\u003C\u002Fp>",{"slug":409,"name":410,"description":411,"image":42,"body":42,"postCount":194},"innate-immunity","Innate Immunity","\u003Cp>Articles related to Innate Immunity. \u003C\u002Fp>",{"slug":413,"name":414,"description":415,"image":42,"body":42,"postCount":282},"respiratory-tract-infection","Respiratory Tract Infection","\u003Cp>In this cluster, you can see various etiological agents that causes respiratory tract infection. \u003C\u002Fp>",{"slug":417,"name":418,"description":419,"image":42,"body":42,"postCount":172},"torch-infection","TORCH Infection","\u003Cp>In this section; you can find articles related with TOCH infection. \u003C\u002Fp>",{"slug":421,"name":422,"description":423,"image":42,"body":42,"postCount":194},"microbiology-for-beginners","Microbiology for Beginners","\u003Cp>These articles are very basic articles, which will share general concepts in Microbiology. \u003C\u002Fp>",{"slug":425,"name":426,"description":427,"image":42,"body":42,"postCount":115},"dna-replication","DNA Replication","\u003Cp>Articles related to DNA and Replication of DNA. \u003C\u002Fp>",{"slug":429,"name":430,"description":431,"image":42,"body":42,"postCount":194},"genetic-code","Genetic Code","\u003Cp>Articles related to Genetic Code.\u003C\u002Fp>",{"slug":433,"name":434,"description":435,"image":42,"body":42,"postCount":172},"molecular-technique","Molecular Technique","\u003Cp>Posts related to Molecular Techniques. \u003C\u002Fp>",{"slug":437,"name":438,"description":42,"image":42,"body":42,"postCount":126},"colorimetric-assay","Colorimetric Assay ",{"slug":440,"name":441,"description":442,"image":42,"body":42,"postCount":172},"pharmaceutical-microbiology","Pharmaceutical Microbiology","\u003Cp>Various articles related to Pharmaceutical Microbiology\u003C\u002Fp>",{"slug":444,"name":445,"description":42,"image":42,"body":42,"postCount":338},"blood-and-immune-cells","Blood and Immune Cells",{"slug":447,"name":448,"description":42,"image":42,"body":42,"postCount":172},"host-pathogen-interaction","Host Pathogen Interaction",{"slug":450,"name":451,"description":42,"image":42,"body":42,"postCount":282},"blood-culture","Blood Culture",{"slug":453,"name":454,"description":42,"image":42,"body":42,"postCount":282},"environmental-microbiology","Environmental microbiology ",{"slug":456,"name":457,"description":42,"image":42,"body":42,"postCount":172},"copromicroscopic-technique","Copromicroscopic Technique",{"slug":459,"name":460,"description":42,"image":42,"body":42,"postCount":338},"quality-control","Quality Control",{"slug":50,"name":462,"description":42,"image":42,"body":42,"postCount":338},"Dermatophytes"]