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Extended-spectrum β-lactamase (ESBL)-producing bacteria are a global health threat both in hospital and in community settings. The emergence of these organisms poses major difficulty in treating infections. This study was carried out to assess major ESBL-producing uropathogens in female patients of Sikkim and Darjeeling by phenotypic and genotypic methods. Out of 1,516 urine samples, 454 uropathogens were isolated with a prevalence rate of 29.94%. Among them, Escherichia coli (74.3%) was the predominant type followed by Klebsiella pneumoniae (20.1%), Pseudomonas aeruginosa (2.4%), and Proteus mirabilis (1.98%). Four different ESBL genes were detected in 63 isolates, which included CTX-M (n = 32), CTX-M+OXA-2 (n = 15), CTX-M-15+OXA-2+TEM (n = 6), OXA-2 (n = 5), TEM+CTX-M-15 (n = 2), TEM+OXA-2+SHV-76 (n = 2), and TEM (n = 1). All ESBL genes (bla genes) were found on a plasmid, which was mostly of HI1, I1, FIA+FIB, FIA, and Y types and was horizontally transferable. Among all ESBL genes, blaCTX-M-I5 group was the most prevalent. The study of urinary tract infection (UTI) caused by ESBL-producing bacteria needs to be studied in other high-altitude parts of India to understand the actual burden of UTI in the female.

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