Dermatophytes may be acquired from a variety of sources which may indicate the genus and species. Spread between humans is the most common source in the urban setting.
Source
Term
Person at Risk
Animals
zoophilic
pet owners, cattle owners
soil or dirt
geophilic
farmers, gardeners
People
anthropophilic
children, fomites, hair stylists
Certain dermatophytes are associated with a specific source.
Source
Common Dermatophyte
pet cat or dog
Microsporum canis
Cattle
Trichophyton verrucosum
people with tinea capitis
Trichophyton tonsurans
A complete history may be necessary to identify the source, especially contact with an animal or person with a skin lesion. Fungal culture can isolate the dermatophyte which may suggest the most likely source.
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