Year: 2021 | Month: June | Volume 11 | Issue 3
Detection of Antimicrobial Resistance in Escherichia coli and Salmonella Isolated from Flies Trapped at Animal and Poultry Farm Premises
The aim of this study was to explore antimicrobial resistance in Escherichia coli and Salmonella species from flies trapped at livestock and poultry farm premises. A total of 36 pools of flies and 72 rectal/cloacae swabs were collected. All the flies were Musca domestica except one fly was Calliphora erythrocephala. E. coli were recovered from all the flies (100%) and fecal (100%) samples. Whereas, Salmonellae were obtained from 21 (58.33%) flies and 15 (20.83%) fecal samples. E. coli and Salmonella isolates were multi-drug resistant strains. E. coli exhibited resistance to amoxicillin-clavulanic acid (100%), cefotaxime (93.57%), aztreonam (59.63%), cefpodoxime (58.71%) and imipenem (48.62%). Salmonellae were also 100% resistant to ampicillin-clavulanic acid followed by cefotaxime (91.66%), cefpodoxime (94.44%) and imipenem (91.66%). Colistin resistance was recorded more in Salmonella (61.11%) than E. coli (12.84%) by phenotypic assays, however, mcr1 to mcr5 genes could not be detected in any of the E. coli and Salmonella isolates. Bacteria studied were ESBL (21.10%) and MBL positive. Present study is suggestive of the fact that flies harbor multidrug resistant, ESBL, MBL and colistin resistant E. coli and Salmonella strains. Extensive monitoring of indicators organisms of AMR in unconventional reservoirs like flies is needed.
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