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Antimicrobial resistance in aquaculture: a crisis for concern

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Abstract

Emergence of antimicrobial resistance (AMR) in cultured fishes is one of the major challenges faced in aquaculture. The high prevalence of bacterial infections in fishes leads to frequent use of antibiotics and thus their persistence in the aquatic environment, which in turn results in the proliferation of antibiotic resistant bacteria. The AMR in aquaculture can be transferred to clinically important strains of natural environment through horizontal gene transfer, thereby affecting the whole ecosystem. Most of the cultured fishes, including ornamental possess diverse pathogens exhibiting multiple antibiotic resistance. A thorough understanding of the gene transfer systems such as plasmids, transposons, integrons and gene cassettes can unravel the complexity of antimicrobial resistance in aquaculture. Continuous monitoring programmes, timely detections of the resistant bacteria and implementation of proper regulations are necessary to curb the dissemination of AMR in aquaculture. The present review summarises the antimicrobial use and AMR in cultured fishes, genetic mechanisms involved in the development of resistance, and the management strategies to restrict the spread of AMR in aquaculture.

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Abbreviations

AMR:

Antimicrobial Resistance

ARG:

Antimicrobial Resistant Gene

MGE:

Mobile genetic elements

HGT:

Horizontal gene transfer

MIC:

Minimum inhibitory concentration

MAR:

Multiple Antibiotic Resistance

ESBL:

Extended spectrum beta lactamases

CI:

Chromosomal integrons

MI:

Mobile integrons

MRI:

Multidrug resistance integrons

GC:

Gene cassettes

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Acknowledgments

The first author acknowledges Department of Science and Technology (DST, SERB) for the Fellowship under National Postdoctoral Fellowship Scheme with Grant number PDF/2017/000378 and Director, National Bureau of Fish Genetic Resources and National Centre for Aquatic Animal Health, Cochin University of Science and Technology for the support.

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Correspondence to Prasannan Geetha Preena.

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Preena, P.G., Swaminathan, T.R., Kumar, V.J.R. et al. Antimicrobial resistance in aquaculture: a crisis for concern. Biologia 75, 1497–1517 (2020). https://doi.org/10.2478/s11756-020-00456-4

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  • DOI: https://doi.org/10.2478/s11756-020-00456-4

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