Abstract
Two outbreaks of cheyietieilosis are described. In one of the outbreaks, a human member of the household was also affected. A 0.25 per cent flpronil 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 reexamined. 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.