Genes related to chloramphenicol,tetracycline,rifampicin and trimethoprim-sulfamethoxazole resistance in multi-drug resistant Acinetobacter baumannii
10.3760/cma.j.issn.1674-2397.2010.03.006
- VernacularTitle:多药耐药鲍曼不动杆菌对氯霉素、四环素、利福平和复方磺胺甲恶唑耐药相关基因分析
- Author:
Jianming ZHU
;
Rujin JIANG
;
Kangle WU
;
Zhaolong MA
;
Haishen KONG
- Publication Type:Journal Article
- Keywords:
Acinembacter baumannii;
Drug resistance,multiple;
Gene
- From:
Chinese Journal of Clinical Infectious Diseases
2010;3(3):148-153
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate ehloramphenicol,tetracycline,rifampicin and trimethoprimsulfamethoxazole resistance and the related genes in multi-drug resistant Acinetobacter baumannii(MDR-ABA).Methods Sixty-two strains of MDR-ABA were isolated from clinical samples,and their susceptibilities to 22 antimicrobial agents were detected by Kirby-Bauer disk diffusion tests.Genes related to chloramphenicol(catB and cmlA),rifampicin(arr-2/3),tetracycline(tetA and tetB)and trimethoprimsulfamethoxazole(sull,dfrA1,dfrA5,dfrA7/17,dfrA12,dfr85)resistance and drug emux genes(tehA,emrB,emrD,emrE,smr-2,mdfA)were analyzed by PCR and verified by DNA sequencing.Results Resistant rates of these MDR-ABAs to chloramphenicol,rifampicin,tetracycline and trimethoprimsulfamethoxazole were 100.0%(62/62),100.0%(62/62),90.3%(56/62)and 82.3%(51/62)respectively,while62 strains(100.0%),46 strains(74.2%),36 strains(58.1%)and 8 strains (12.9%)were detected to carry mafA,tetB,sull and tehA genes,respectively.The lest 13 genes were all negative.tetB,sull,tehA and mafa genes(2 for each)chosen optionally from positive ones were verified by DNA sequencing and BLASTn.and all were identified as the same sequences in GenBank.Conclusions MDR-ABAs show hish resistance to chloramphenicol,tetracycline, rifampiein and trimethoprimsulfamethoxazole.Multi-drug resistant phenotypes of MDR-ABAs may be closely related to mdfA genes harboring in strains.
