携带耶尔森强毒力岛的大肠埃希菌耐药性及其对雏鸭的致病性试验

为了解105株动物源携带耶尔森强毒力岛的大肠埃希菌耐药状况和致病性,分别对各分离菌进行28种抗菌药物的敏感性测定,并选择不同毒力基因型的10株大肠埃希菌进行雏鸭的致病性试验.结果表明,分离菌对四环素、多西环素、氨苄西林、阿莫西林、复方磺胺甲(噁)唑、链霉素耐药性较高,耐药率均在80%以上;敏感率在80%以上的药物有头孢...

Drug Resistance and Pathogenicity to Ducks of E. coli Strains with Yersinia HPI

In order to identify the resistance condition of 105 Escherichia coli strains with Yersinia HPI and their pathogenicity,the antimicrobial sensitivity tests were carried out to Escherichia coli,and the pathogenicity tests of 10 strains to ducks were carried out.The results indicated that the isolates displayed a high-level resistance to totetracycline,doxycycline,ampicillin,amoxicillin,trimethoprim-sulfamethoxazole and streptomycin,with a resistance rate above 80%;However,those strains displayed a high-level sensitivity to ceftazidime,ampicillin/sulbactam,amikacin,cefoxitin,aztreonam,ceftriaxone and netilmicin with a rate above 80%.Among the 105 isolates of Escherichia coli,there were 87 sorts of resistance spectrums.The results showed that all of those 10 strains displayed strong pathogenicity to ducks;There was not positive correlation between the genotype and their pathogenicity.The results prompted the severity of drug resistance in Escherichia coli isolates,and the importance of prevention colibacillosis.