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The study aimed to investigate the occurrence of carbapenem resistant E. coli and P. aeruginosa in apparently healthy, captive blackbucks and leopards of India. Faecal samples of blackbucks (n = 7) and leopards (n = 7) were processed to isolate carbapenem resistant E. coli (CRE) and P. aeruginosa (CRP). Forty (leopards n = 26; blackbuck n = 14) E. coli and two P. aeruginosa (blackbuck n = 2) samples were isolated from the faecal samples (n = 14). Eleven carbapenem resistant isolates were recovered, of which 10 were CRE and one was CRP. The minimum inhibitory concentration (MIC) was determined for meropenem for carbapenem resistant isolates and was between 8 and 64 μg/mL. All the CRE and CRP were phenotypically multidrug resistant, and six CRE were extended-spectrum betalactamases (ESBL) producers. On genotypic screening, seven CRE and one CRP were positive for the blaNDM carbapenemase gene. Efflux pump-mediated carbapenem resistance was noticed in four CRE isolates (36.4%, 4/11). Of the six ESBL producing CRE, four isolates carried blaCTX-M-1 genes. The CRE isolates also harbored blaTEM-1, blaAmpC, qnrA, qnrB, qnrS, tetA, tetB and sul1 resistance genes. On Shiga toxin virulence screening, Stx1, Stx2 genes were detected in two and one isolates, respectively. Plasmid typing of CRE revealed that the blaNDM genes were carried on an Incl1 plasmid. The plasmid multilocus sequence typing (pMLST) of the isolates showed the Sequence Type (ST) 297. The occurrence of carbapenem resistance bacteria in captive wildlife should be a major public health priority.

Carbapenem resistant Escherichia coli and Pseudomonas aeruginosa in captive blackbucks (Antilope cervicapra) and leopards (Panthera pardus) from India