Abstract
Klebsiella pneumoniae is an important pathogen that causes pneumonia and bloodstream infections, especially in neonates and intensive care patients. The carbapenems remain an important therapeutic option for clinicians, particularly against cephalosporin-resistant Gram-negative pathogens. This increased use of carbapenems at clinics has resulted in the evolution and spread of carbapenem-resistant K. pneumoniae. In this study, we isolated six bla K. pneumoniae carbapenemase (KPC)-producing strains belonging to sequence type 258 (ST258) from clinical, environmental, and veterinary sources. Antibiotic susceptibility was performed on these isolates and the genes responsible for extended-spectrum beta-lactamases and metallo-beta-lactamase production were screened. The molecular typing was done using multilocus sequence typing. Isolated strains were resistant to various antibiotic classes, including carbapenems, and carried the carbapenem-resistant gene, blaKPC. All strains were susceptible to tigecycline and colistin. This is the first report detecting K. pneumoniae ST258 strains in Pakistan.
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