伊维菌素微量给药杀灭怀孕母牛体内蛔虫幼虫效果观察

Effect of Ivermectin Microdose on Ascaris Larvae in Pregnant Cows

为探索伊维菌素微量给药,杀灭母牛体内感染的蛔虫幼虫,以达到保护犊牛,使之免遭感染的目的,选感染蛔虫幼虫的怀孕母牛56头,随机分为两组,对照组不给药,试验组在母牛怀孕238~245 d时,用伊维菌素以20μg/(kg·bw)剂量,皮下注射。经对两组母牛所产犊牛调查,对照组所产28头犊牛全部感染蛔虫,试验组产的犊牛有3头感染,25头未遭感染。本次试验的结果表明,用伊维菌素微量给药,杀灭母牛体内感染的蛔虫幼虫,对犊牛的保护率为89.29%(差异极显著P<0.01)。结论:采用此法预防犊牛感染蛔虫是有效的。

In order to kill the larvae of Ascaris lumbricoides in cows and protect the calves from infection,56 pregnant cows infected with ascaris larvae were randomly divided into two groups:experiment group and control group.In the experimental group,the dosage of 20μg/kg.bw of ivermectin was injected subcutaneously at 238~245 d during pregnancy,while the control group was not injected.The results showed that 28 calves in the control group were infected with ascaris lumbricoides,3 calves in the experimental group were infected and 25 calves were not infected.The results indicated that the protective rate of killing ascaris larvae infected by cow with Ivermectin was 89.29%(P<0.01).Conclusion:This method is effective to prevent the infection of ascaris lumbricoides in calves.