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- W4239380014 abstract "Abstract Carbapenem resistance in Gram-negative bacteria is an ongoing public-health problem of global dimensions leaving very few treatment options for severely infected patients. This study focuses on the dissemination of plasmid-borne carbapenemase genes in Gram-negative bacteria in Tamil Nadu, India. A total of 151 non-repetitive isolates belonging to 11 genera were collected from a diagnostic center in Tamil Nadu. E. coli (n=57) isolates were classified as, Enteropathogenic (n=12), Enteroaggregative (n=9), Enterohemorrhagic (n=8), Enterotoxigenic (n=3), Enteroinvasive (n=1) and unclassified E. coli (n=24). Of the 45 Klebsiella species, 14 were K1 whereas 11 were K2 serotype and in 20 Klebsiella serotype could not be determined. Other isolates (n=49) consisted of P. aeruginosa , S. typhi , E. cloacae , A. baumannii , S. marcescens , A. xylosoxidans , P. mirabilis and E. meningoseptica . Of the 151 isolates, 71% (n=107) and 68% (n=103) were found to be resistant to meropenem and imipenem respectively. The most prevalent beta-lactamase gene was bla NDM-1 (21%, 12/57) followed by bla OXA-181 (16%, 9/57), bla GES-9 (n=8), bla OXA-23 (n=7), bla IMP-1 (n=3), bla GES-1 (n=11) and bla OXA-51 (n=9). The unusual presence of bla OXA-23 was seen in E. coli (n=4), and bla OXA-23 and bla OXA-51 (IncA/C) in K. pneumoniae (n=3). Plasmid incompatibility (inc/rep) typing results showed that the plasmids carrying resistance genes (n=11) belonged to IncX, IncA/C, IncFIA-FIB and IncFIIA groups. E. coli and K. pneumoniae were able to transfer plasmid-borne carbapenemase via conjugation. This study highlights the prevalence of carbapenem resistance and the acquisition of plasmid-borne carbapenemase genes in Gram-negative bacteria highlighting the role of plasmid transfer in disseminating resistance." @default.
- W4239380014 created "2022-05-12" @default.
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- W4239380014 date "2020-12-18" @default.
- W4239380014 modified "2023-09-26" @default.
- W4239380014 title "Dissemination of Carbapenem-resistance and Plasmids-encoding Carbapenemases in Gram-negative Bacteria Isolated from India" @default.
- W4239380014 doi "https://doi.org/10.21203/rs.2.15952/v2" @default.
- W4239380014 hasPublicationYear "2020" @default.
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