Journal
INFECTION AND DRUG RESISTANCE
Volume 14, Issue -, Pages 5069-5078Publisher
DOVE MEDICAL PRESS LTD
DOI: 10.2147/IDR.S336451
Keywords
Klebsiella pneumoniae; virulence genes; capsular types; antimicrobial resistance
Categories
Funding
- National Natural Science Foundation of China [81973983]
- National Science and Technology Major Project [2017ZX10204401]
- Collaborative Tackling and Public Health Collaborative Innovation Project in Anhui Province [GXXT-2020-018]
- Joint Construction Project of Clinical Medicine University and Hospital [2021lcxk006]
- Natural Science Research Project of Universities in Anhui Province [KJ2020A0176]
- Borrowing and Transferring Subsidy Project in 2019, Hefei [J2019Y04]
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In Anhui province, there is a high prevalence of hyper virulent Klebsiella pneumoniae (HvKP) infections, especially in intensive care units and respiratory and critical care departments. The most common capsular serotype is K2, followed by K1. Most HvKP strains are carbapenem resistant, with the majority harboring KPC.
Background: Klebsiella pneumoniae (K. pneumoniae) causes community-acquired and hospital-acquired pneumonia. The mortality rates of invasive infections caused by hyper virulent K. pneumoniae (HvKP) are extremely high. However, the microbiological characteristics and clinical manifestations of K. pneumoniae in AnHui province still remain unclear. Purpose: To show the high prevalence of HvKP infections regarding clinical characteristics and antimicrobial resistance in Anhui province. Patients and Methods: A retrospective analysis was conducted to study the clinical data of 115 strains of K. pneumoniae from July 2019 to March 2020 in The First Affiliated Hospital of AnHui Medical University. The virulence genes, capsular types, carbapenemase genes, and molecular subtypes of these hypervirulent isolates were detected. Results: Overall, 59.1% (68/115) cases were HvKP infections, mainly from the department of intensive care unit (ICU, n=14, 20.6%) and the department of respiratory and critical care (n=13, 19.1%). K2 was the most prevalent capsular serotype (n=26), followed by K1 (n=21). The results of MLST identification of 68 strains showed that ST23 (n=15, 22.1%) was the most common type of ST, followed by ST11 and ST65 (n=12, 17.6%), ST86 (n=9, 13.2%), and ST412 (n=6, 8.8%). Among 68 hvKP strains, 12 isolates were carbapenem resistant, and all except two harboured KPC. Conclusion: The high incidence of carbapenemase producing HvKP in the Anhui province, especially the higher mortality of HvKP, should be paid more attention. Meanwhile, epidemiological surveillance and clinical treatment strategies should be continuously determined and implemented.
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