The infection with the mite Cheyletiella yasguri Smiley in 3 dogs and 5 out of 6 persons exposed to infestation is reported. Two of the dogs appeared to have been infected during a stay in a kennel. The dogs presented with moderate itching and slight to massive floury squamation on the back. In the infected persons, excoriated papules were present on the body and the extremities. The itching, which had persisted for 4--12 months, disappeared in all cases a few days after the dogs had been removed from the house. In the dogs, three antiparasitic baths were sufficient to exterminate the mite population.