Foreyt W J
Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99164-7040.
J Wildl Dis. 1993 Jan;29(1):85-9. doi: 10.7589/0090-3558-29.1.85.
Four Rocky Mountain bighorn sheep (Ovis canadensis canadensis) were experimentally inoculated with Psoroptes sp. of bighorn sheep origin by placing approximately 50 mites into each ear. Two sheep developed reproducing mite colonies and lesions consisting of alopecia, and exudative dermatitis with scabs on ears, face and neck. Three months after inoculation, all four sheep were treated with an in-feed formulation of ivermectin at a dosage of 1 mg/kg of body weight in a pelleted ration daily for seven consecutive days. Mites could not be detected on any of the sheep 1, 2, or 3 mo after treatment, and lesions on the affected sheep resolved within 6 to 8 wk after treatment. Thus, under these conditions, ivermectin was completely effective in eliminating the mites; it also was palatable and nontoxic. Use of ivermectin in pelleted feed for field treatment of psoroptic mange is encouraged.
对四只落基山大角羊（加拿大盘羊指名亚种）进行了实验性接种，通过在每只耳朵中放入约50只螨，接种源自大角羊的痒螨属螨。两只羊形成了繁殖螨群落，并出现了包括脱毛、耳部、面部和颈部结痂的渗出性皮炎等病变。接种三个月后，对所有四只羊连续七天每天以1毫克/千克体重的剂量在颗粒饲料中添加伊维菌素进行治疗。治疗后1个月、2个月或3个月，在任何一只羊身上均未检测到螨，受影响羊的病变在治疗后6至8周内消退。因此，在这些条件下，伊维菌素在消除螨方面完全有效；它也可口且无毒。鼓励在颗粒饲料中使用伊维菌素对绵羊痒螨病进行田间治疗。
