Trichophyton tonsurans

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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History
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Malmsten, 1845

General definition
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Human pathogenic, anthropophilic dermatophyte with special affinity to hair.

Occurrence/Epidemiology
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Worldwide spread. Incidence in Europe is increasing (more common among black migrants).

Manifestation
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Occurs in adults and children alike.

Clinical picture
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S.u. Tinea, tinea corporis, tinea capitis, tinea capitis superficialis, tinea barbae, tinea unguium. Mostly solitary, reddened, inflammatory, finely scaling plaques on the trunk, extremities, nails or capillitium. Infestation of the hair on the head including the hair shaft (endothrix infection). Usually breaking off the hair above the level of the skin. Particularly widespread as a pathogen of the "Tinea corporis gladiatorum" in martial arts and fitness sports.

Microscopy
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  • Macroconidia: Rare, clumsy, pleomorphic, colorless, smooth, 2-6 chambers.
  • Microconidia: Numerous; especially in the marginal zone, multiform, mainly elongated to pyriform, length: 3-10 μm, width: 1.5-5 μm, pedunculated attachments on the hyphae, mostly botrytis-shaped on the hyphae.
  • Chlamydospores: Very numerous; especially localized in the middle part of the thallus, cluster-like loose arrangement, rarely rocket hyphae or spiral hyphae.

Note(s)
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Known and analysed type I allergens in Trichophyton tonsurans

  • Tri t 1
  • Tri t 4 Serine protease

Literature
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  1. Adams BB (2002) Tinea corporis gladiatorum. J Am Acad Dermatol 47: 286-290
  2. Altindis M (2003) Prevalence of tinea capitis in primary schools in Turkey. Mycoses 46: 218-221
  3. Kolivras A (2003) Tinea capitis in Brussels: Epidemiology and New Management Strategy. Dermatology 206: 384-387
  4. Mohrenschlager M et al (2001) Tinea capitis of childhood: incidence and pathogenetic role of Trichophyton tonsurans in Central Europe. J Am Acad Dermatol 45: 320-321
  5. Ravenscroft J (2000) Trichophyton tonsurans tinea capitis and tinea corporis: treatment and follow-up of four affected family members. Pediatric Dermatol 17: 407-409
  6. Tietz HJ (2000) Results of the first dermatomycoses quality control study in Germany. Mycoses 43: S63-S67

Disclaimer

Please ask your physician for a reliable diagnosis. This website is only meant as a reference.

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Last updated on: 29.10.2020