青海果洛州德昂乡屠宰牦牛大肠杆菌耐药性观察

用美国NCCLS规定的纸片扩散法药敏试验，对30株来自德昂乡3个试验点的屠宰牦牛大肠杆菌进行了耐药性观察。结果：30株大肠菌对环丙沙星、庆大霉素、卡那霉素、新霉素、氯霉素，链霉素的耐药率均为O％，痢特灵的中介率为6．7％，氨苄青霉素的耐药率及中介率均为10％，表明抗微生物药使用较少的牦牛体内大肠杆菌耐药性的产生也较少。

Test of Drug Tolerance of Colibacillus from slaughter Yaks in Deang Country of Guoluo Prefecture in Qinghai Province

Strains of Colibacillus from the slaughter yaks at three test points of Deang county were used to conduct the test of drug tolerance by method of paper diffusion provided by America NCCLS.The results were that the drug tolerance rate of 30 strains of Colibacillus to ciprofloxacin,gentamicin Kanamycin,neomycin,chloramphenicol and streptomycin was the zero,the intermediary rate of furazolidone was the zero,the drug tolerance rate and the intermediary rate of ampicillin were all the 10%,suggesting that there were less strains of Colibacillus with drug tolerance in the yaks which was less treated with antimicrobial.