鲍曼不动杆菌耐药性与外排泵机制及群体信号系统基因检测分析

目的 分析不同耐药鲍曼不动杆菌外排泵基因及群体信号系统基因的分布,探讨不同耐药基因型鲍曼不动杆菌与抗菌药物耐药的特点.方法 收集2018年1月至2021年7月皖南医学院第二附属医院130株鲍曼不动杆菌,按耐药性不同分为多重耐药菌31株、碳青霉烯类耐药菌43株和非多重耐药菌56株,分析各组鲍曼不动杆菌对抗生素的耐药性,采...

Correlation analysis of drug resistance of Acinetobacter baumannii with efflux pump mechanism and Quorum sensingsystem

Objective To analyze the distribution of different drug-resistant Acineto- bacter baumannii with efflux pump genes and Quorum sensing system genes, and explore the characteristics of different drug resistant genotypes of Acinetobacter baumannii and antimicrobial resistance.Methods From January 2018 to July 2021, 130 strains of Acinetobacter baumannii from the Second Affiliated Hospital of Wannan Medical College were collected and divided into multidrug-resistant strains(31 strains),carbapenem-resistant strains(43 strains) and nondrug-resistant strains(56 strains) according to their drug resistance. The antibiotic resistance of Acinetobacter baumannii in each groupwas analysed. The efflux pump genes ade B, ade J, abe S and abe M,and Quorum sensing system genesAba I, Aba Rwere detected by PCR. Results The resistance rates of multidrug-resistant and carbapenem-resistant strains to ceftazidime, ceftriaxone, ciprofloxacin,levofloxacin, co-trimoxazole, piperacillin/tazobactam were all >60%among the 130 strains of Acinetobacter baumannii. The results showed that the detection rateof ade B, ade J, abe S, abe M, Aba I, and Aba R was 43.85%,48.46%,46.15%,48.46%,46.15%,48.46%, respectively.Among them, the efflux pump genes and Quorum sensing system genes in the non multidrug resistant strain group were lower than the other two groups. The detection rates of Quorum sensing system genes Aba I and Aba R in the carbapenem-resistant group were significantly higher than thosein multidrug resistant group (x²=6.049, 6.188; both P<0.05).Conclusions The clinically isolated Acinetobacter baumannii has serious drug resistance,and the carbapenem-resistance is closely related to carrying Quorum sensing system genes.