1Department of Parasitology, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran
2Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran
3Department of Veterinary Tropical Diseases, Faculty of Veterinary Medicine, University of Pretoria, Pretoria, South Africa
This report is on infestation with Chorioptes bovis of Holstein cattle on a dairy farm included 900 cows in Tabriz. Ten heifers and 25 milking cows under the age of 5 years were infested. Clinical signs consisted of alopecia, crusts, ulcerations and superficial skin fissures. Pruritus and itching were severe in all cases. Lesions were present around the base of the tail, on the neck and below the knee. Skin scrapings were examined and eggs, larvae, nymphs and adult mites were recovered. The infested animals were separated from others and treated three times at weekly intervals with 0.05% solution of sebacil. Signs of improvement were observed after the final treatment.