Abstract:Objective To analyze antimicrobial susceptibility and carrying status of antimicrobial resistance genes of carbapenem-resistant Klebsiella pneumoniae (CRKP) in China. Methods Antimicrobial susceptibility testing was performed on CRKP collected from the China Antimicrobial Resistance Surveillance Trial from 2017 to 2018 by Institute of Clinical Pharmacology of Peking University, carrying status of carbapenemase genes and other extended-spectrum beta-lactamases (ESBLs) genes in CRKP were detected by polymerase chain reaction (PCR) and sequencing detection. Results A total of 129 strains of CRKP were screened out, polymyxin E, tigecycline, fosfomycin trometamol and minocycline were the effective antimicrobial agents, susceptibility rates were 80.62%, 79.07%, 51.16% and 51.16% respectively, susceptibility rates of other antimicrobial agents were all lower than 46%. PCR and sequencing results showed that 112 strains carried carbapenemase gene, mainly blaKPC-2 (77.52%) and blaNDM (8.53%) genes, and 3 strains (2.33%) carried both blaKPC-2 and blaNDM genes. Detection rate of blaTEM gene was 51.94% (67/129), all of which were blaTEM-1; detection rate of blaSHV gene was 64.34% (83/129), mainly blaSHV-12 gene (27.91%, 36/129); detection rate of blaCTX-M gene was 53.49% (69/129), which were blaCTX-M-9 (43.41%) and blaCTX-M-15 (10.08%) respectively, 4 strains (3.10%) contained both blaCTX-M-9 and blaCTX-M-15 genes. Among carbapenemase gene positive strains, 80.36% (90/112) carried ESBLs genes simultaneously, and 32.14% (36/112) carried two or more ESBLs genes simultaneously. Conclusion Antimicrobial resistance of CRKP isolated in China is serious, and there are multiple antimicrobial resistance genes at the same time, the most common carbapenemase gene is blaKPC-2 gene, and the most common ESBLs genes are blaSHV-12 and blaCTX-M-9 genes.