Trichophyton verrucosum

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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Bodin, 1902

General definition
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Primary zoophilic, secondary anthropophilic, human pathogenic dermatophyte. Especially cattle and their environment (stables) are direct and indirect sources of infection.

Occurrence/Epidemiology
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Worldwide spread. Common among rural dwellers with contact to pets. Men are affected significantly more often than women.

Clinical picture
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Preferably infestation of the hair follicles of the capillitium and the beard. S.u. Tinea barbae, tinea capitis, tinea capitis profunda. Rare infestation of the hairless skin, see below Tinea corporis.

Microscopy
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  • Long, gnarled, terminal thickened hyphae.
  • Arthrospores: Numerous, simultaneously growing, chain-like arrangement, right-angled lateral branches.
  • Chlamydospores: Numerous, thick-walled, usually arranged intercalary.
  • Microconidia: Rare, mostly pyriform, rarely rat-tail-like or pointed, arranged laterally on the hyphae, length: 3-5 μm, width: 2-3 μm.
  • Macroconidia: Rare, smooth and thin-walled, small (length: 12-25 μm, width: 4-8 μm), 3-8 chambers, terminal.

Literature
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  1. Altindis M et al (2003) Prevalence of tinea capitis in primary schools in Turkey. Mycoses 46: 218-221
  2. Czaika V et al (1998) Dermatomycosis caused by Trichophyton verrucosum in mother and child. dermatologist 49: 576-580
  3. Korman TM et al (1998) Inflammatory tinea corporis due to Trichophyton verrucosum. Clin Infect Dis 26: 220-221
  4. Maeda M etv al (2002) Tinea barbae due to Trichophyton verrucosum. Eur J Dermatol 12: 272-274
  5. Monod M (2002) Survey of dermatophyte infections in the Lausanne area Switzerland. Dermatology 205: 201-203
  6. Seebacher C (2000) Epidemiology, clinic and treatment of dermatomycoses caused by zoophilic dermatophytes. Mycoses 43: S4-7

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