an outbreak of chorioptes bovis mange on a dairy farm in tabriz, iran

this report is on infestation with chorioptes bovis of holstein cattle on a dairy farm included 900 cowsin tabriz. ten heifers and 25 milking cows under the age of 5 years were infested. clinical signs consisted ofalopecia, 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 wereexamined and eggs, larvae, nymphs and adult mites were recovered. the infested animals were separatedfrom others and treated three times at weekly intervals with 0.05% solution of sebacil. signs of improvementwere observed after the final treatment.