【摘要】 从西藏地区牦牛自然病例中分离出 5株大肠杆菌 ,通过形态观察、生化试验 ,血清学鉴定及动物致病性试验 ,表明 5株分离菌是培养特性和生化特性基本一致、具有很强致病力、血清型不同的致病性大肠杆菌。更多还原

【Abstract】 strains of Escherichia coli were isolated from died yak in Tibet.It showed that these strains had almost the same cultural and biochemical characteristics ,high pathogenicity and different serogroups by morphological observation,biochemistry test,serotype identification and pathogenicity test.更多还原