2株鸭源肠球菌的生物学特性的观察

Identification and Virulence of Two Enterococcus Strains Isolated from Ducks

对2株鸭源肠球菌临床分离株和1株粪肠球菌参考菌株的形态特征、培养特性、生理生化特性、对药物的敏感性等生物学特性进行了初步研究。结果表明,3个被检菌株在光学显微镜下呈球形、革兰氏阳性染色和链状排列方式,能在10℃、45℃和6.5%NaCl肉汤等条件下生长,能耐热60℃30min,其特性均符合肠球菌属的特征,各菌株生化反应特性均与粪肠球菌特性基本一致,3个菌株均可鉴定为粪肠球菌。药敏试验结果表明,3个菌株均对青霉素、万古霉素、庆大霉素、红霉素和氯霉素敏感而对四环素耐药。

The morphological,cultural characters,biochemistry characters of two Enterococcus strains isolated from dying ducks and one reference strain of E.facials were studied and the sensitivity to 10 antimicrobic agents were evaluated to identify the isolates.Results showed that the bacteria shared the following characteristics:gram-positive cocci,arrayed by chain,survival 10 ℃,45 ℃and 6.5% NaCl broth,fermentation of sucrose and other biochemistry characters.Most of these biological characters correspond with E.facials.Additionally,the results of drug sensitivity test indicated that the sensitive extent of different strains to the antimicrobial agents varied obviously.In conclusion,all the three strains were sensitive to penicillin,vancomycin and gentamycin,but resistant to tetracycline.