The Detection of hypermucoviscous carbapenem-resistant klebsiella pneumoniae from a tertiary teaching hospital in Malaysia and assessment of hypermucoviscous as marker of hypervirulence
Document Type
Article
Publication Date
1-1-2021
Abstract
Background: Hypermucoviscous carbapenem-resistant Klebsiella pneumoniae (hmCRKp) is emerging globally and approaching the worst-case scenario in health care system. Aims: The main objective in this study was to determine the hypermucoviscous characteristics among the carbapenem-resistant K. pneumoniae (CRKp) isolated from a teaching hospital in Malaysia. The association of hypermucoviscous phenotype with the virulence traits and clinical presentations were also investigated. Methods: A retrospective study was conducted in University Malaya Medical Centre (UMMC). The presence of hypermucoviscous K. pneumoniae was identified among a collection of CRKp clinical isolates (first isolate per patient) from 2014 to 2015 using string test. Correlation between clinical and microbial characteristics of the hmCRKp was investigated. Results: A total of nine (7.5%) hmCRKp were detected among 120 CRKp isolates. Majority of the isolates were hospital acquired or health care-associated infections. None of the patients had typical pyogenic liver abscess. All of the hmCRKp isolates harbored carbapenemase genes and were multidrug resistant. K1/K serotype, peg-344, allS, and magA were not identified among hmCRKp isolates, whereas aerobactin siderophore receptor gene (iutA), iroB, rmpA, and rmpA2 were detected. Only three hmCRKp isolates were resistant to serum bactericidal. Conclusions: All the isolates presented inconclusive evidence for the interpretation of hypervirulence. Therefore, more study should be performed in the future to have a better understanding of the virulence mechanisms in correlation with the clinical and microbial determinants.
Keywords
Carbapenem-resistant Klebsiella pneumoniae, Hypermucoviscous, Serum bactericidal, Virulence genes, Hypervirulence, Malaysia
Divisions
fac_med
Funders
International Society of Infectious Diseases (IF016-2015),Fundamental Research Grant Scheme (FP013-2018A)
Publication Title
Microbial Drug Resistance
Volume
27
Issue
10
Publisher
Mary Ann Liebert
Publisher Location
140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA