摘要
应用3.0%伊维菌素长效注射剂,选择自然感染牛颚虱的1岁牦牛100头,分别以低(0.3 mg/kg)、中(0.6 mg/kg)、高(0.9 mg/kg)体重剂量颈部皮下注射,同时设1%伊维菌素注射剂0.2 mg/kg剂量皮下注射作对照,进行防治效果评价。结果:给药后7 d、14 d、21 d、28 d、35 d、42 d、56 d、70 d,伊维菌素长效注射剂中剂量试验组牦牛牛颚虱转阴率分别为85.0%、100.0%、100.0%、100.0%、100.0%、100.0%、95.0%和95.0%;杀虫率分别为83.5%、100.0%、100.0%、100.0%、100.0%、100.0%、78.4%和64.0%;高剂量组转阴率和杀虫率均为100.0%;低剂量组转阴率分别为35.0%、50.0%、55.0%、60.0%、65.0%、65.0%、70.0%和60.0%;杀虫率分别为39.0%、52.5%、62.4%、66.0%、66.7%、77.3%、66.0%和61.7%。试验证明,伊维菌素长效制剂对放牧牦牛牛颚虱有明显效果,全部试验牦牛给药后未见异常反应。从牛颚虱转阴率、减少率和驱虫率的有效性评价看,本品0.9 mg/kg剂量可作为推荐剂量。
A total of 100 one-year-old yaks with natural infection of c.chinensis were injected subcutaneously into the neck at low(0.3 mg/kg),medium(0.6 mg/kg) and high(0.9 mg/kg) body weight, respectively.At the same time, subcutaneous injection of 1% ivermectin at a dose of 0.2 mg/kg was used as the control to evaluate the control effect.The results showed that at 7 d, 14 d, 21 d, 28 d, 35 d, 42 d, 56 d and 70 days after administration, the negative conversion rates of b.japonicus were 85.0%,100.0%,100.0%,100.0%,100.0%,100.0%,95.0% and 95.0% in medium-dose ivermectin oil suspension long-acting injection test groups, respectively.The killing rates were 83.5%,100.0%,100.0%,100.0%,100.0%,100.0%,78.4% and 64.0%,respectively.The negative conversion rate and killing rate of high dose group were 100.0%.The negative conversion rates in low dose group were 35.0%,50.0%,55.0%,60.0%,65.0%,65.0%,70.0% and 60.0%,and the killing rates were 39.0%,52.5%,62.4%,66.0%,66.7%,77.3%,66.0% and 61.7%,respectively.The experiment proved that ivermectin oil suspension long-term preparation has obvious effect on grazing yaks.No abnormal reaction was found in all yaks.The dosage of 0.9 mg/kg of this product can be used as the recommended dose for the evaluation of the effectiveness of the conversion rate, reduction rate and repellent rate of b.chinensis.
作者
雷萌桐
李春花
蔡进忠
王小红
孙建
潘宝良
LEI Meng-tong(Academy of Animal Science and Veterinary Medicine of Qinghai University,Xining 810016;Guinan Animal Husbandry and Veterinary Station,Guinan 813100)
出处
《青海畜牧兽医杂志》
2022年第3期4-8,共5页
Chinese Qinghai Journal of Animal and Veterinary Sciences
基金
国家重点研发专项(2018YFD0502305)
青海省重大科技专项(2016-NK-A7)。
关键词
牦牛
伊维菌素
长效注射剂
牛颚虱
持效期对比试验
Yak
Ivermectin
Long-acting injection
Cattle jaw tick
Comparative test of retention period