目的了解泸州本地质粒介导的耐多药大肠埃希菌的CTX M、CTX M 3基因分布情况。方法用K-B法进行耐药菌株筛选,PCR扩增CTX M、CTX M 3基因,琼脂糖凝胶电泳检测基因大小,阳性产物外送测碱基序列。结果 71株大肠埃希菌中,有一株死亡。全敏6...目的了解泸州本地质粒介导的耐多药大肠埃希菌的CTX M、CTX M 3基因分布情况。方法用K-B法进行耐药菌株筛选,PCR扩增CTX M、CTX M 3基因,琼脂糖凝胶电泳检测基因大小,阳性产物外送测碱基序列。结果 71株大肠埃希菌中,有一株死亡。全敏6株,占8.57%,单耐16株,占22.86%,双耐18株,占26.71%,耐多药30株,占42.86%。耐多药质粒中的阳性结果经DNA测序仪检测基因序列,与已知的基因相比较,CTX M有23株,占76.67%,CTX M 3有21株,占70%。两种基因均含有的有12株,占40%。结论泸州地区耐多药大肠埃希菌存在质粒介导的CTX M、CTX M 3基因,耐多药的大肠埃希菌对第三代头孢菌素中的头孢唑肟敏感,对亚胺培南,美罗培南较敏感。展开更多
An extensively drug-resistant(XDR)Escherichia coli strain 258E was isolated from an anal swab sample of a chicken farm of Anhui province in China.Genomic analyses indicated that the strain 258E harbors an incompatibil...An extensively drug-resistant(XDR)Escherichia coli strain 258E was isolated from an anal swab sample of a chicken farm of Anhui province in China.Genomic analyses indicated that the strain 258E harbors an incompatibility group N(IncN)plasmid pEC258-3,which co-produces bla_(CTX-M-3),bla_(KPC-2),bla_(TEM-1B),qnrS1,aac(6')-Ib-cr,dfrA14,arr-3,and aac(6')-Ib3.Multiple genome arrangement analyses indicated that pEC258-3 is highly homologous with pCRKP-1-KPC discovered in Klebsiella pneumoniae from a patient.Furthermore,conjugation experiments proved that plasmid pEC258-3 can be transferred horizontally and may pose a significant potential threat in animals,community and hospital settings.展开更多
文摘目的了解泸州本地质粒介导的耐多药大肠埃希菌的CTX M、CTX M 3基因分布情况。方法用K-B法进行耐药菌株筛选,PCR扩增CTX M、CTX M 3基因,琼脂糖凝胶电泳检测基因大小,阳性产物外送测碱基序列。结果 71株大肠埃希菌中,有一株死亡。全敏6株,占8.57%,单耐16株,占22.86%,双耐18株,占26.71%,耐多药30株,占42.86%。耐多药质粒中的阳性结果经DNA测序仪检测基因序列,与已知的基因相比较,CTX M有23株,占76.67%,CTX M 3有21株,占70%。两种基因均含有的有12株,占40%。结论泸州地区耐多药大肠埃希菌存在质粒介导的CTX M、CTX M 3基因,耐多药的大肠埃希菌对第三代头孢菌素中的头孢唑肟敏感,对亚胺培南,美罗培南较敏感。
基金the National Key Research and Development Program of China(2018YFE0192600)the Shanghai Agriculture Applied Technology Development Program,China(T20200104)+1 种基金the Fundamental Research Funds for the Central Universities,China(2020JB05)the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences(CAAS-ZDRW202203).
文摘An extensively drug-resistant(XDR)Escherichia coli strain 258E was isolated from an anal swab sample of a chicken farm of Anhui province in China.Genomic analyses indicated that the strain 258E harbors an incompatibility group N(IncN)plasmid pEC258-3,which co-produces bla_(CTX-M-3),bla_(KPC-2),bla_(TEM-1B),qnrS1,aac(6')-Ib-cr,dfrA14,arr-3,and aac(6')-Ib3.Multiple genome arrangement analyses indicated that pEC258-3 is highly homologous with pCRKP-1-KPC discovered in Klebsiella pneumoniae from a patient.Furthermore,conjugation experiments proved that plasmid pEC258-3 can be transferred horizontally and may pose a significant potential threat in animals,community and hospital settings.
