Infection and Drug Resistance (Nov 2022)
Co-Existence of KPC-2, LAP-2, and CTX-M-65 in an ST1469 Multidrug-Resistant Klebsiella pneumoniae Strain in China
Abstract
Chunlei Chen,1,* Qingmiao Shi,1,* Xinjun Hu,2 Xiaojing Liu,1,3 Yi Liu,1 Ruishan Liu1 1Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, People’s Republic of China; 2Department of Infectious Diseases, The First Affiliated Hospital, College of Clinical Medicine, Henan University of Science and Technology, Luoyang, People’s Republic of China; 3Department of Structure and Morphology, Jinan Microecological Biomedicine Shandong Laboratory, Jinan, People’s Republic of China*These authors contributed equally to this workCorrespondence: Ruishan Liu, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, No. 79 Qingchun Road, Hangzhou, Zhejiang, 310000, People’s Republic of China, Tel +86 571 872 364 23, Fax +86 571 872 364 21, Email [email protected]: Beta-lactamase-producing Klebsiella pneumoniae is common in the clinic, but research associated with the co-existence of KPC-2, LAP-2, and CTX-M-65 in K. pneumoniae is still rare. In this study, the phenotypic and genetic characteristics of a multidrug-resistant K. pneumoniae strain SJ25 co-harboring blaKPC-2, blaLAP-2, and blaCTX-M-65 with rare ST1469 were investigated.Methods and Results: Antimicrobial susceptibility testing revealed that strain SJ25 was resistant to various common antibiotics, except ciprofloxacin, fosfomycin, colistin, and tigecycline. Whole-genome analysis revealed that strain SJ25 carries a variety of antimicrobial resistance genes and virulence determinants. Plasmid analysis confirmed that the blaKPC-2 and blaCTX-M-65 genes were located on an ~136 kb transferrable IncFII/IncR plasmid and that blaLAP-2 was located on an untypeable plasmid.Conclusion: Our findings emphasized the need for continuous surveillance of β-lactamase-bearing K. pneumoniae in the clinic to control potential dissemination and outbreak.Keywords: Klebsiella pneumoniae, multidrug-resistant, blaKPC-2, blaLAP-2, blaCTX-M-65
