Therapeutic efficacy of topical selamectin in feline otoacariosis

Abstract

Otodectes cynotis (ear mite) is a psoroptid mite that accounts for 50-80% of otitis externa cases in cats. A 9 year old female cat was presented with history of intense aural irritation, scratching at the ears and presence of brown waxy exudates from the external ear canal. Diagnosis is made with microscopic examination of ear wax, revealing the presence of the Otodectes cynotis. The cat was treated with selamectin spot-on preparation at 6mg/kg body weight, as single dose applied topically in a single spot at the base of the neck region infront of the scapulae. A single administration of a spot-on formulation of selamectin at the minimum dose was found to be efficient in the treatment of ear mite infestations in the present case.