摘要
目的分析重庆市三大片区二级及以下医院临床标本中检出的多重耐药菌(MDRB)的常见耐药基因型分布,完善本地区细菌耐药监测网。方法对检出的7 206株MDRB中,菌株数排前的5种菌,取重培养纯菌落,采用PCR技术及测序法,对其常见耐药基因型进行检测、比对分析。结果不动杆菌以携带TEM、SUL;GyrA基因型为主,肺炎克雷伯菌以携带SHV、GyrA为主,大肠埃希菌以携带TEM、CTX-M、SUL、GyrA、aac(3)Ⅱ为主,铜绿假单胞菌以携带SUL、GyrA为主,葡萄球菌以携带GyrA、aac(6′)-aph(2′′)为主;5种MDRB中多重表达2种或4种常见耐药基因型的菌株最为多见,其中大肠埃希菌的多重表达检出率最高,达92.74%,葡萄球菌的多重表达检出率较低;各片区及各年检出MDRB所携带的常见耐药基因型的各检出率间差异均有统计学意义(P<0.05);5种MDRB携带的7种常见耐药基因型测序结果与NCBI Blastn数据库中相对应细菌的基因序列进行比对,基本一致。结论重庆市二级及以下医院检出的MDRB携带常见耐药基因型及分布,与重庆地区三甲医院和全国监测水平基本一致,应加强这类医院感染病原菌耐药监测,合理用药,以延缓本地区病原菌耐药的发展速度。
Objective To analyze the distribution of common drug-resistance genotypes of multi-drug resistant bacteria（MDRB）in second class and below hospitals in 3big areas of Chongqing City for perfecting the bacterial drug resistance surveillance network in local area.Methods In 7206 detected strains of MDRB,the re-cultured pure colonies of top five bacteria in the bacterial strains numer were taken and performed the common drug resistant genotyping detection and comparative analysis by PCR technique and sequencing.Results Acinetobacter spp.was dominated by the genotypes carrying TEM,SUL and GyrA genes,Klebsiella pneumoniae was dominated by the genotypes carrying SHV,GyrA genes,Escherichia coli was dominated by the genotypes carrying TEM,CTX-M,SUL,GyrA,aac（3）Ⅱ genes,Pseudomonas aeruginosa was dominated by genotypes carrying SUL,GyrA genes,Staphylococcus was dominated by genotypes carrying GyrA,aac（6′）-aph′′genes;among the five strains of MDRB,the majority were the strains with multiple expression of two kinds or four kinds of common drug-resistance genes,in which the detection rate of Escherichia coli multiple expression was highest,reaching 92.74%,the detection rate of Staphylococcus multiple expression was lower.The detection rates of common drug resistant genotypes carried by MDRB had statistical difference among various areas and various years（P〈0.05）;in the comparison with the gene sequences of corresponding bacteria in NCBI Blastn database,the sequencing results of 7common drug resistant genotypes carried by 5kinds of MDRB were basically consistent.ConclusionThe common drug-resistant genotypes carried by MDRB detected in the second class and below hospitals of Chongqing City and their distribution are basically consistent with the monitoring levels in the local tertiary hospitals and whole nation.Therefore the antibacterial surveillance of infection pathogenic bacteria should be strengthened in these hospitals,and medication should be rationally used so as to delay the development of pathog
出处
《国际检验医学杂志》
CAS
2017年第7期868-872,共5页
International Journal of Laboratory Medicine
基金
重庆市卫生和计划生育委员会课题资助项目(2013-2-207)
