Synergistic effect of polymyxin B combined with 12 types of traditional antibiotics on in vitro antimicrobial action against carbapenem-resistant Klebsiella pneumoniae
10.11816/cn.ni.2025-240872
- VernacularTitle:多黏菌素B与12种传统抗菌药物对耐碳青霉烯肺炎克雷伯菌体外抗菌的协同作用
- Author:
Rongxin LIANG
1
;
Han WU
;
Yunjun PAN
;
Yiping YIN
;
Yanhong LI
Author Information
1. 十堰市人民医院湖北医药学院附属人民医院检验科,湖北 十堰 442000
- Publication Type:Journal Article
- Keywords:
Carbapenem-resistant Klebsiella pneumoniae;
Drug resistance gene;
Drug resistance rate;
Polymyxin B;
Combined use of drugs
- From:
Chinese Journal of Nosocomiology
2025;35(6):818-822
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE To observe and compare the synergistic rates of combined use of polymyxin B with 12 types of traditional antibiotics against carbapenem-resistant Klebsiella pneumoniae(CRKP)in vitro antimicrobial ac-tion.METHODS Totally 30 strains of CRKP were randomly drawn from 312 strains of CRKP that were isolated from the clinical departments of Shiyan People's Hospital between 2020 to 2023.The carbapenemases were detec-ted by Carba NP test.The six genotypes KPC,OXA-48,OXA-23,NDM,VIM and IMP were detected by means of fluorescent quantitative polymerase chain reaction(PCR),the drug resistance of the strains was detected by mi-cro broth dilution method,and the synergistic effect of polymyxin B combined with 12 types of traditional antibi-otics on in vitro antimicrobial action was detected by using micro chessboard dilution method.RESULTS All of the isolated CRKP strains produced carbapenemases,with the KPC genotype dominant.The drug resistance rates to cephalosporins,carbapenems and quinolones reached up to 100.00％,and no polymyxin B-resistant strains were detected.The synergistic rates of minocycline and rifampicin combined with polymyxin B to the in vitro antimicro-bial action were the highest,which were 73.33％and 50.00％,respectively;the synergistic rates of levofloxacin and ciprofloxacin combined with polymyxin B were the lowest,and both were 0.The synergistic rates of meropen-em and imipenem combined with polymyxin B to the in in vitro antimicrobial action were 36.67％and 30.00％,re-spectively.The synergistic rates of ceftazidime,cefepime,piperacillin-tazobactam and cefoperazone-sulbactam combined with polymyxin B to the in vitro antimicrobial action were less than 30.00％.CONCLUSIONS Polymyxin B combined with minocycline and rifampicin should be taken as the first choice for treatment of the CRKP-induced infection.The synergistic rate of the carbapenems combined with polymyxin B is higher than that of the cephalo-sporins combined with polymyxin B to the antimicrobial action.Levofloxacin and ciprofloxacin combined with pol-ymyxin B do not have synergistic effect on the in vitro antimicrobial action.
