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Athlete's foot, known medically as tinea pedis, is a common skin infection of the feet caused by a fungus. [2] Signs and symptoms often include itching, scaling, cracking and redness. [3] In rare cases the skin may blister. [6] Athlete's foot fungus may infect any part of the foot, but most often grows between the toes. [3]
Trichophyton rubrum is a dermatophytic fungus in the phylum Ascomycota.It is an exclusively clonal, [2] anthropophilic saprotroph that colonizes the upper layers of dead skin, and is the most common cause of athlete's foot, fungal infection of nail, jock itch, and ringworm worldwide. [3]
Trichophyton is a genus of fungi, which includes the parasitic varieties that cause tinea, including athlete's foot, ringworm, jock itch, and similar infections of the nail, beard, skin and scalp. Trichophyton fungi are molds characterized by the development of both smooth-walled macro- and microconidia .
Podiatrists explain what athlete’s foot is, how people get athlete’s foot and how to prevent it. They also share over-the-counter treatments for athlete’s foot that can help get rid of it.
Epidermophyton is a genus of fungus causing superficial and cutaneous mycoses, including E. floccosum, and causes tinea corporis (ringworm), tinea cruris (jock itch), tinea pedis (athlete's foot), and tinea unguium (fungal infection of the nail bed).
Infected hair shafts are broken off just at the base, leaving a black dot just under the surface of the skin, and alopecia can result. [3] Scraping these residual black dot will yield the best diagnostic scrapings for microscopic exam. Numerous green arthrospores will be seen under the microscope inside the stubbles of broken hair shafts at 400×.
The fungus was first isolated in 1870 from a tinea cruris patient in Germany by Carl Otto Harz, who named it Acrothecium floccosum. [10] Being unaware of Harz's work, Castellani and Sabouraud identified the species again in 1905 and 1907, respectively, and both placed the fungus into the genus Epidermophyton. [11]
Tolnaftate is included in many products for fungal skin infections such as athlete's foot, jock itch and ringworm. Del Campo says it's best, however, to opt for a preparation designed for nails.