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Category: Clinical Microbiology
Fungal Zoonoses, Page 1 of 2
< Previous page | Next page > /docserver/preview/fulltext/10.1128/9781555819262/9781555819262_Ch03-1.gif /docserver/preview/fulltext/10.1128/9781555819262/9781555819262_Ch03-2.gifAbstract:
Dermatophytoses are chronic fungal infections caused by dermatophytes, that is, keratinophilic fungi that are able to utilize keratin-containing structures (hair, nails, scales, etc.) from humans and animals. They belong to the genera Epidermophyton, Microsporum, and Trichophyton of the family Arthrodermataceae. Individual species may be anthropophilic, zoophilic, or geophilic. Zoophilic species from warm-blooded animals with overt or latent infections may, if transmitted to humans, give rise to severe cases of dermatitis. Transmission from human to human is possible, although infectivity decreases with each passage and dies out after three to four passages. Anthropophilic dermatophytes, such as Trichophyton rubrum, T. tonsurans, and Epidermophyton floccosum, can also (although rarely) be transmitted from humans to animals, in whom they may cause skin diseases. In turn, these animals could be a source for human infections. The same chain may operate in primarily geophilic species, such as Microsporum racemosum and M. gypseum.
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Tinea capitis (Alopecia areata) caused by Microsporum canis. (Archives of the Dermatology Department, Justus Liebig University, Giessen, Germany.)
Tinea capitis (Alopecia areata) caused by Microsporum canis. (Archives of the Dermatology Department, Justus Liebig University, Giessen, Germany.)
Tinea corporis. Patch of a Microsporum canis infection following contact with an infected cat. (Courtesy of Prof. W. Meinhof, Dermatology Department, Rheinisch-Westfälische Technische Hochschule, Aachen, Germany.)
Tinea corporis. Patch of a Microsporum canis infection following contact with an infected cat. (Courtesy of Prof. W. Meinhof, Dermatology Department, Rheinisch-Westfälische Technische Hochschule, Aachen, Germany.)
Deep trichophytosis in a farmer, caused by Trichophyton verrucosum following contact with infected cattle. (Archives of the Dermatology Department, Justus Liebig University, Giessen, Germany.)
Deep trichophytosis in a farmer, caused by Trichophyton verrucosum following contact with infected cattle. (Archives of the Dermatology Department, Justus Liebig University, Giessen, Germany.)
Superficial trichophytosis in an animal caretaker caused by Trichophyton mentagrophytes following contact with infected rabbits. (Courtesy of Dr H Mayer, Heidelberg, Germany.)
Superficial trichophytosis in an animal caretaker caused by Trichophyton mentagrophytes following contact with infected rabbits. (Courtesy of Dr H Mayer, Heidelberg, Germany.)
Trichophytosis (scutula-like patch) in a child caused by Trichophyton quinckeanum following contact with infected guinea pigs. (Archive of the Institute of Parasitology, Justus Liebig University, Giessen, Germany.)
Trichophytosis (scutula-like patch) in a child caused by Trichophyton quinckeanum following contact with infected guinea pigs. (Archive of the Institute of Parasitology, Justus Liebig University, Giessen, Germany.)
Zoophilic Zoonotic Species of Dermatophytes
Zoophilic Zoonotic Species of Dermatophytes