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中文摘要：
经分离培养采自贵州省5个地区县级市65个规模化养鸡场的1180份样品，生化鉴定得到839株大肠杆菌，分离率为70．89％，采用微量肉汤稀释法测定其对9种抗菌药物的耐药情况。结果表明，分离菌对9种抗菌药物具有不同程度的耐药，土霉素、氟苯尼考和复方新诺明的耐药率高达80％以上，对多粘菌素E、大观霉素耐药率相对较低。839株大肠杆菌均为多重耐药菌株，最少的对2种药物耐药，最多的对9种药物耐药。
英文摘要：
To investigate the antibiotic resistance of E. coli isolated from poulrty in large-scale farms of Guizhou. According to the conventional method, 1 180 samples from 65 large-scale farms in five regions of Guizhou were collected, 839 E. coli strains were i- dentified by biochemical identification method, the isolation rate was 70.98%, and were measured the MIC values to 9 kinds of an- tibiotics with the method of micro-broth dilution. Result demonstrated that the poulrty E. coli strains to the 9 kinds of antibiotics hanve different degrees of resistance, the resistance rates to terramycin, florfenicol and compound sulfamethoxazole were as high as 80% above, the resistance rates to polymyxin E and spectinomycin were relatively low. 839 E. coli strains were multiple drug-resis- tant strains, and were resistanted to at least to two kinds of antimicrobial, at most to 9 kinds of antimicrobial.
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