Image Quiz: Dermatology-Patchy alopecia in a Chihuahua
What's causing this dog's hair loss?
This Chihuahua puppy has patchy areas of nonpruritic alopecia on its face and trunk.
Results of cytologic examination of skin scrapings for mites were negative, but a trichogram demonstrated fungal infection of several hair shafts.
Gross and cytologic morphology of the dermatophyte culture are shown below.
What is your diagnosis?
a) Microsporum gypseum infection
b) Trichophyton mentagrophytes infection
c) Microsporum nanum infection
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