IMR Press / CEOG / Volume 48 / Issue 3 / DOI: 10.31083/j.ceog.2021.03.2259
Open Access Short Communication
Diverse genetic characteristics of ESBL-producing Klebsiella pneumoniae isolates from obstetrics & gynaecology settings in some major hospitals, China
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1 Department of Clinical Laboratory, Associated Hospital, Beihua University, 132002 Jilin, Jilin, China
2 Department of Molecular Diagnosis, School of Laboratory Medicine, Beihua University, 132013 Jilin, Jilin, China
3 Department of Clinical Laboratory, Shaoxing University, 321000 Shaoxing, Zhejing, China

These authors contributed equally.

Clin. Exp. Obstet. Gynecol. 2021, 48(3), 483–486;
Submitted: 19 August 2020 | Revised: 8 October 2020 | Accepted: 21 October 2020 | Published: 15 June 2021
Copyright: © 2021 The Author(s). Published by IMR Press.
This is an open access article under the CC BY 4.0 license (

Background: We investigated the susceptibility patterns and genotype of extended-spectrum-beta-lactamase (ESBL)-producing Klebsiella pneumoniae isolates. Methods: A prospective survey of K. pneumoniae-infected patients was conducted in obstetrics & gynaecology settings in three associated hospitals of a university in China from 2017 to 2019. All isolates were identified as K. pneumoniae by the conventional standard procedures and confirmed by use of the VITEK GNI system. Susceptibility to 16 antimicrobial agents of ESBLs was determined by way of a screening procedure using discs. PCR amplification of bla genes, and sequencing of PCR products were performed to determine their molecular types. Results: A total of 518 of K. pneumoniae were isolated from sputum specimens in three affiliated hospitals. Out of these, 158 strains were ESBL producers and 64 strains were non-ESBL producers from the first hospital; 114 strains were positive for producing ESBLs and 60 strains were negative for ESBLs in the second hospital, and 86 strains were ESBL producer and 36 strains were negative from the third hospital. bla gene contents showed that 88 strains (24.6%) carried the blaTEM-2 gene, and 74 strains (20.1%) contained the blaSHV-3 gene, 44 strains (12.3%) had the blaCTX-M-2 gene, 42 strains (11.7%) had the blaCTX-M-4 gene, 38 strains (10.6%) harboured blaCTX-M-5 and blaCTX-M-8 genes, and 29 (9.5%) strains contained blaCTX-M-15 gene. Also, 20 (5.6%) strains contained blaOXA-1. The co-existence of blaCTX-M-15 and blaSHV-3 was identified in 20 strains (5.6%), 12 strains (3.3%) co-existed with blaSHV-3 and blaTEM-2, 14 isolates (3.9%) harboured blaTEM-2 and blaCTX-M-15, eight isolates (2.2%) possessed blaSHV-3, blaTEM-2, and blaCTX-M-15. Discussion: The high prevalence of ESBLs in K. pneumoniae isolates with diverse enzyme gene types indicated the need for screening the changes in ESBL-producing isolates in this region.

Klebsiella pneumoniae
Molecular epidemiology
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