A case of feline otitis externa due to Microsporum canis

We describe a case of a 3-month-old Persian male cat with a persistent waxy , ceruminous, otic discharge in both external auditory canals. After microb iological culture, only Microsporum canis was isolated with no concurrent f ungal or bacterial flora. Fungal otitis due to dermatophytes was diagnosed and specific treatment with griseofulvin was administered. After 4 weeks of treatment, no M. canis colonies were isolated and clinical recovery had oc curred. In view of this case, dermatophytosis should be included in the dif ferential diagnosis of feline otic conditions. particularly when otitis bec omes chronic or is refractory to treatment.