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High level of multidrug-resistant Escherichia coli in young dairy calves in southern Vietnam
Department of Animal Sciences and Veterinary Medicine, An Giang University, Long Xuyên, An Giang Province, Vietnam; Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, SE-75007, Uppsala, Sweden.
Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, SE-75007, Uppsala, Sweden.
Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), SE-75189, Uppsala, Sweden.ORCID iD: 0000-0003-2219-2659
Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, SE-75007, Uppsala, Sweden.
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2019 (English)In: Tropical Animal Health and Production, ISSN 0049-4747, E-ISSN 1573-7438, Vol. 51, p. 1405-1411Article in journal (Refereed) Published
Abstract [en]

This study investigated the occurrence of antimicrobial-resistant Escherichia coli in dairy calves in southern Vietnam. Fecal samples were taken directly from the rectum of 84 calves from 41 smallholder dairy farms, when newborn and at 14 days of age for isolation of E. coli. Escherichia coli strains were isolated from 144 of the 168 fecal samples tested. Of the 144 E. coli isolates, 40% were found to be susceptible to all 12 antimicrobial drugs tested and 53% of the E. coli isolates were resistant to at least three antimicrobials. Calves were colonized with antimicrobial-resistant E. coli already on the day of birth. Resistance to tetracycline was most common, followed by resistance to sulfamethoxazole, ampicillin, trimethoprim, and ciprofloxacin. Four isolates carried a gene encoding for extended-spectrum cephalosporinases (ESC), and these genes belonged to blaCTX-M group 1 (2 isolates), blaCTX-M group 9 (1 isolate), and blaCMY-2 (1 isolate). Thirty-three isolates had a plasmid-mediated quinolone resistance (PMQR) phenotype, and 30 of these carried the qnrS gene. These results are of importance for management routines of dairy cattle to prevent the spread of antimicrobial resistance.

Place, publisher, year, edition, pages
Springer, 2019. Vol. 51, p. 1405-1411
Keywords [en]
Antimicrobial resistance, Extended-spectrum cephalosporinases, Plasmid-mediated quinolone resistance
National Category
Microbiology
Identifiers
URN: urn:nbn:se:oru:diva-107626DOI: 10.1007/s11250-019-01820-6ISI: 000473214500012PubMedID: 30734887Scopus ID: 2-s2.0-85061255853OAI: oai:DiVA.org:oru-107626DiVA, id: diva2:1788400
Funder
Sida - Swedish International Development Cooperation Agency
Note

The authors would like to thank the Swedish International Development Cooperation Agency (SIDA) through the Mekong Agriculture Research Network (MEKARN II) project for financial support.

Available from: 2023-08-16 Created: 2023-08-16 Last updated: 2023-12-29Bibliographically approved

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