A 9-year-old, castrated male domestic shorthair cat was presented for a 6-year history of sneezing and coughing.
History. The sneezing and coughing had been poorly controlled by numerous courses of various antibiotics. An initial response was seen, but the signs would recur soon after antibiotic discontinuation. A mucopurulent nasal discharge was also present intermittently, and serous discharge was noted at other times. The cough was slightly productive and intermittent. Appetite and weight had not been affected. The cat was a strictly indoor pet and had recently moved from the southeastern United States.