乙酰氨基阿维菌素对奶牛内寄生虫的驱虫效果简

为了验证乙酰氨基阿维菌素对内寄生虫的驱虫效果，在自然感染内寄生虫的北京润民养殖公司奶牛场进行试验：选取20头奶牛分成实验组和对照组，每组10头，实验牛每头注射0．2mg／kg乙酰氨基阿维菌素，在试验当天、7天、14天、21天、28天分别采集两组每一头牛的粪便，用MCMASTER法测定粪便中的线虫虫卵数量，计算注射乙酰氨基阿维菌素后奶牛粪便中虫卵减少率，同时北京三元食品股份有限公司对两组奶牛所产的牛奶进行品质检测。结果表明：注射乙酰氨基阿维菌素后第二周开始，实验组奶牛粪便内的线虫虫卵数量大幅度减少，而对照组奶牛粪便内的线虫虫卵数量基本保持不变；注射组奶牛所产的牛奶经北京三元食品股份有限公司严格的入场检测无乙酰氨基阿维菌素残留。说明乙酰氨基阿维菌素对奶牛内寄生虫具有很好的驱虫效果。

Study on the Deworming Effect with Eprinovermectins in Cows Entozoa

The aim of the syudy is to investigate the effect of eprinovermeetins to control Nema. A 28-day trial was conducted in cows entozoa. Twenty middle lactation period cows that have natural beening infected by entozoa were randomly divided into two groups, the test group cows were injected 0.2mg/kg＇bw EPR, the control group were nothing to deal with respectively, all the faeces of cows were collected in the day after drug administration of 0, 7,14,21,28, then the numbers of egg entozoa （EPG） in the faeces of cows were determined by MCMASTER tec- nique, and egg reduction rates were counted,quality of milk were determined by Beijing Sanyuan Food co., LTD. The results showed that the numbers of egg entozoa in test group significant reduced after two weeks of injecting EPR, but the numbers of egg entozoa in control group have no change nearly all the time. The change of egg reduction rates is the same situation as the numbers of egg entozoa, the level of egg reduction rates reach 95.08% in the end of the trail. There were no antibiotic residue been tested in the milk of two groups. The EPR have a wonderful deworming effect to cows entozoa.