Use of a 0.25 per cent fipronil pump spray formulation to treat canine cheyletiellosis.

Two outbreaks of cheyletiellosis are described. In one of the outbreaks, a human member of the household was also affected. A 0.25 per cent fipronil pump spray formulation was applied to the affected and in-contact animals. A permethrin spray was used in an attempt to eliminate environmental contamination. One month later, the affected animals were re-examined. No evidence of Cheyletiella mites could be found. A second application of fipronil was undertaken. No further outbreaks were reported during an eight month follow-up.