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High Prevalence of Multiple Antibiotic-Resistant, Extended-Spectrum β-Lactamase (ESBL)-Producing Escherichia coli in Fresh Seafood Sold in Retail Markets of Mumbai, India

Post Harvest Technology, ICAR-Central Institute of Fisheries Education (CIFE), Versova, Andheri (W), Mumbai 400061, India
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Vet. Sci. 2020, 7(2), 46; https://doi.org/10.3390/vetsci7020046
Received: 12 March 2020 / Revised: 3 April 2020 / Accepted: 4 April 2020 / Published: 16 April 2020
(This article belongs to the Special Issue Foodborne Zoonoses at the Human-Animal-Environment Interface)
In this study, fresh seafood in retail markets was investigated for the antibiotic susceptibility patterns of the faecal indicator Escherichia coli and distribution of important β-lactamase encoding genes. E. coli were isolated from 50 (37 fish and 13 shellfish) fresh seafood samples and studied with respect to the phenotypic and genotypic characters of antibiotic resistance. Of 475 E. coli isolates from fresh seafood, 71.58% exhibited extended-spectrum β-lactamase (ESBL)-positive phenotypes. A high percentage of isolates were resistant to indicator cephalosporins cefotaxime (95%), cefpodoxime (90.88%) and ceftazidime (90.29%). Relatively higher susceptibilities were recorded against imipenem (74.41%), cefoxitin (66.76%) and meropenem (51.18%). The multiple antibiotic resistance (MAR) index of 97.35% of the isolates was above 0.18. The ESBL genes blaCTX-M, blaSHV and blaTEM were detected in 62.37%, 23.35% and 2.6% of E. coli isolates, respectively. The ESBL-producing isolates also harboured the metallo-β-lactamase-encoding genes blaOXA (7.06%), blaNDM (4.42%) and blaVIM (0.88%). This study highlights the risk of dissemination of multidrug resistant E. coli in seafood consumer communities and also the need to improve the hygiene of the coastal waters, landing centres and the retail markets. View Full-Text
Keywords: MAR index; India; beta lactamase; MBL; disc diffusion; seafood; PCR MAR index; India; beta lactamase; MBL; disc diffusion; seafood; PCR
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Singh, A.S.; Nayak, B.B.; Kumar, S.H. High Prevalence of Multiple Antibiotic-Resistant, Extended-Spectrum β-Lactamase (ESBL)-Producing Escherichia coli in Fresh Seafood Sold in Retail Markets of Mumbai, India. Vet. Sci. 2020, 7, 46.

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