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甘肃部分地区动物源肠球菌的分离鉴定及耐药性研究

Isolation,identification and antibiotic resistance investigation of Enterococcus from different livestock in parts of Gansu Province

  • 摘要: 【目的】研究甘肃省部分地区动物源肠球菌的耐药情况。【方法】采集300份猪、牛和羊粪便样品,利用培养基和PCR方法进行肠球菌的分离鉴定,药敏纸片法检测肠球菌对12种抗生素的耐药性,微量肉汤稀释法检测万古霉素最小抑菌浓度,PCR检测万古霉素耐药基因。【结果】共分离肠球菌246株,肠球菌耐药率最高的3种抗生素为苯唑西林、复方新诺明和克林霉素,多重耐药菌占82.11%;不同动物源肠球菌的耐药性差异显著(P<0.05),猪源肠球菌中多重耐药菌占比最高,为94.4%;不同肠球菌的耐药性差异显著(P<0.05),多重耐药性屎肠球菌占比100%;肠球菌对万古霉素耐药率为24.39%,携带的万古霉素耐药基因为van C1和/或van C2/3。【结论】甘肃部分地区动物源肠球菌的耐药率高,多重耐药现象严重,且存在万古霉素耐药性转移的风险。

     

    Abstract: 【Objective】 To investigate the antibiotic resistance of Enterococcus from different livestock in parts of Gansu Province.【Method】 Enterococcus was isolated from 300 faecal samples and further identified by differential medium and PCR,the K-B method was used to determine the sensitivity of 12 antimicrobial agents against Enterococcus. The broth microdilution method was used to determine the minimum inhibitory concentration(MIC) of vancomycin against Enterococcus,and vancomycin resistance genes were detected by PCR.【Result】 A total of 246 Enterococcus strains were isolated from 300 samples,the resistance rates of oxacillin,TMPco and clindamycin were the highest with rates,and multidrug-resistant Enterococcus accounted for 82. 11%. There were significant differences among drug resistance of Enterococcus from different animals,and multidrug-resistant Enterococcus from pig accounted for 94. 4%. There were significant differences between the drug resistance of different Enterococcus,and multidrug-resistant E. faecium accounted for 100%. The van C1 and/or van C2/3 genes were carried by Enterococcus,and the carrying rate of the vancomycin resistance genes was 24. 39%.【Conclusion】 The Enterococcus from animals had high drug resistance to antibiotics,and with the attribute of multidrug resistance and the risk of vancomycin resistance transfer in parts of Gansu Province.

     

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