新疆阿克苏地区猪源粪肠球菌耐药性分析及相关耐药基因的检测

Drug resistance analysis of Enterococcus faecalis isolated from pigs and detection of related drug resistance genes in Aksu, Xinjiang

  • 摘要: 【目的】 分析新疆阿克苏地区猪源粪肠球菌对抗菌药物的耐药性及相关耐药基因携带情况。 【方法】 从阿克苏地区三个猪场采集的624份肛拭子样,通过肠球菌选择培养基结合粪肠球菌持家基因PCR检测的方法进行粪肠球菌的分离鉴定,采用琼脂稀释法对分离的粪肠球菌进行药物敏感性试验,使用PCR方法检测相关耐药基因。 【结果】 共分离粪肠球菌160株,分离率为25.6%(160/624)。分离的粪肠球菌对红霉素、泰乐菌素、四环素、多西环素、庆大霉素和沃尼妙林的耐药率均达到97.0%以上,值得注意的是分离的粪肠球菌对利奈唑胺的耐药率为21.3%(34/160),未发现万古霉素耐药菌株。阿克苏地区分离的猪源粪肠球菌耐药谱型在3~10耐之间,其主要谱型为6耐(28.1%)和8耐(30.6%)。 【结论】 三个猪场均检出ermBermCtet(K)、tet(L)、tet(M)、aac(6')/aph(2")、lsa(E)基因,检出率均达到50%以上;多药耐药基因optrAlsa(E)检出率达到25.6%(44/160)、40.0%(64/160)。

     

    Abstract: 【Objective】 In order to understand the drug resistance of Enterococcus faecalis from pigs in Aksu area of Xinjiang to antimicrobial drugs and the carrying status of related drug resistance genes. 【Methods】 624 anal swab samples were collected from three pig farms in Aksu area and combined Enterococcus selective medium with the housekeeping gene of Enterococcus faecalis by PCR detection method that were used to isolate and identify Enterococcus faecalis. The agar dilution method was used to test the drug sensitivity of the isolated Enterococcus faecalis, and the PCR method was used to detect related drug resistance genes. 【Results】 160 strains of Enterococcus faecalis were isolated, and the isolation rate was 25.6% (160/624). The resistance rates of the isolated Enterococcus faecalis to erythromycin, tylosin, tetracycline, doxycycline, gentamicin and vornimulin all reached more than 97.0%. It is worth noting that the resistance rate of isolated Enterococcus faecalis to linezolid was 21.3% (34/160), and no vancomycin-resistant strains were found. The drug resistance spectrums of Enterococcus faecalis isolated from Aksu area were from 3 to 10, and the main spectrums are 6 (28.1%) and 8 (30.6%). 【Conclusion】 ermB, ermC, tet(K), tet(L), tet(M), aac(6')/aph(2"), lsa(E) genes were detected in all three pig farms, and the detection rates were more than 50%; the detection rate of multidrug resistant genes optrA, lsa(E) reached 25.6% (44/160), 40.0% (64/160).

     

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