The aim of this study was monitoring and surveillance in different wards of the PIMS hospital, Islamabad, to understand emerging challenges of antibiotic resistance in particular association with most virulent serotypes of Klebsiella pneumoniae. The study was conducted during March 2015 to September 2015. The study showed that rate of isolation of K. pneumoniae was 37% (103 positives out of a total of 277 clinical samples) and 7.7% (8) were phenotypically and genotypically confirmed to be metallo-β-lactamase resistant (carbapenem resistant) and all of them were multidrug resistant (MDR). These carbapenem-resistant isolates were isolated from blood, endotracheal tubes, and pus. Molecular screening for the presence of integrons indicated that distribution of class I integrons (87.5% of carbapenem-resistant K. pneumoniae isolates) was higher than class II integrons (1.25%) among given isolates. The study indicated that exposure of metallo-beta-lactamase-producing strains through hospitalizations increases the chances of spread of MDR pathogens. There is an urgent need for effective surveillance and monitoring strategies to control the spread of extremely resistant K. pneumoniae implicated in nosocomial infections leading to the increased health burden and enforcement of policy guideline on appropriate antibiotics usage.
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