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Trichophyton mentagrophytes Trichophyton mentagrophytes is a causative agent of Onychomycosis, Tinea barbae, Tinea capitis, Tinea corporis, Tinea cruris, Tinea faciei, and Tinea pedis. (Information from www.doctorfungus.org @ 2005)
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Trichophyton mentagrophytes Mold Pictures
(Image Courtesy of www.doctorfungus.org @ 2005)
:Microscopic morphology of
Trichophyton mentagrophytes kangaroo variant
(Image Courtesy of www.doctorfungus.org @ 2005) Trichophyton mentagrophytes kangaroo variant on Mycobiotic agar. Cultures are cream -
colored, flat, with a central umbo or slight folding, and a suede - like
to downy surface, which may become powdery around the periphery with age.
(Image Courtesy of www.doctorfungus.org @ 2005)
Large circular lesions with a raised erythematous advancing border on the stomach caused by Trichophyton mentagrophytes kangaroo variant.
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Ecology Trichophyton mentagrophytes is a cosmopolitan fungus dermatophyte, that requires keratin for growth and can cause superficial infections of the skin, hair and nails, which may either be anthropophilic (attracted to humans especially, as a source of food) or zoophilic (prefer lower animals to humans as a source of food) in nature. The principal reservoirs of the zoophilic varieties in nature are certain small mammals, such as rodents, hedgehogs, and rabbits, however, many other animal species may also be infected.
Pathogenicity and Health Effects Trichophyton mentagrophytes var. interdigitale, the anthropophilic type of isolates, are the frequent causative agents of chronic infection of the feet, the nails, and the groin. When infecting humans, the zoophilic isolates, such as T. mentagrophytes var. mentagrophytes, are more frequently associated with inflammatory lesions of the scalp, the glabrous skin, the nails, and the bear region.
Macroscopic Appearance Ø Growth rate is moderately rapid and texture of anthropophilic isolates ranges from downy to powdery while colonies of zoophilic isolates are granular; and Ø Surface colony color is white to pink while reverse is yellowish, brown or reddish brown.
Microscopic Appearance Ø Spiral hyphae are frequently present; Ø Microconidia are round to pyriform in shape, unicellular, appear in closely re – branched clusters or along with otherwise undifferentiated hyphae, frequently numerous, however at times, may be present rarely in anthropophilic isolates ; and Ø Macroconidia are often absent, but if present, mostly are club – shaped, with thin, smooth walls, are multi – septate, and solitary.
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The mycological information gathered and
A
Clinical Laboratory Handbook:
Mold
in the
Bible
Bible at threats to people, animals, and plants. Mold Prevention is always needed. "The way to control indoor mold growth is to control moisture,” reports the U.S. Environmental Protection Agency. To keep indoor humidity in the mold-safe 30-40%, use our Surround Air Dehumidifier. |
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