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Trichophyton violaceum Trichophyton violaceum is a causative agent of Dermatophytosis, Tinea capitis, Tinea corporis, and Onychomycosis. (Information from www.doctorfungus.org @ 2005)
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(Image Courtesy of www.doctorfungus.org @ 2005)
Microscopic morphology of Trichophyton violaceum showing broad, tortuous, much - branched, distorted hyphae and lack of conidia which are typical of strains grown on the usual media.
(Image Courtesy of www.doctorfungus.org @ 2005) Trichophyton violaceum on mycobiotic agar Culture is very slow growing, glabrous or waxy, heaped and folded and a deep violet in color.
(Image Courtesy of www.doctorfungus.org @ 2005)
"Black dot" endothrix tinea capitis in an Australian Aborigine showing numerous broken - off infected hairs and pustular lesions of the scalp.
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Ecology Trichophyton violaceum is an anthropophilic dermatophyte commonly isolated from North Africa and the Middle East, and also from certain parts of Europe. Some prevalent foci exist in South America and Mexico.
Pathogenicity and Health Effects Trichophyton violaceum is isolated mainly from tinea of the scalp, although it is capable of infecting the glabrous skin, nails, and the soles of the feet. Animal infection is rare.
Macroscopic Appearance Ø Growth rate is very slow and texture of colonies is glabrous; and Ø Both surface and reverse colony color is deep red to violet.
Microscopic Appearance Ø Hyphae with an irregular diameter are present; Ø Microconidia are typically absent, however, may be present at times when cultured in an thiamine - enriched media; and Ø Macroconidia are typically absent while chlamydospores are produced as the culture matures.
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The mycological information gathered and
A
Clinical Laboratory Handbook:
Entire Home Mold Testing |
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