Distribution and dissemination of antimicrobial-resistant Salmonella in broiler farms with or without enrofloxacin use

BMC Veterinary Research
Ke ShangMin Kang

Abstract

Salmonella is a major zoonotic food-borne pathogen that persists on poultry farms, and animals undergo reinfection with endemic strains. The present study aimed to investigate the characteristics and dissemination of antimicrobial-resistant Salmonella within and between broiler farms that used enrofloxacin and those that did not. Cloacal and environmental (litter, feed, and water) samples from two selected flocks in each of 12 farms owned by the same company were collected three times over a 30-day period of two production cycles during 2015-2016. The rate of Salmonella isolation was 7.8% (123/1584). Nine Salmonella serotypes (116 isolates) and seven untypable isolates were identified, and Salmonella Montevideo was the most prevalent serotype. Azithromycin-resistant (17.9%) and colistin-resistant (3.3%) isolates were detected, and multidrug-resistant isolates (43.1%) were also observed. No isolate was resistant to enrofloxacin or ciprofloxacin; however, intermediate resistance to enrofloxacin was significantly higher (P < 0.05) in farms that used enrofloxacin than in those that did not. The rate of multi-drug resistance among litter isolates (25/44, 56.8%) was significantly higher (P < 0.05) than that among cloacal swab (24/67,...Continue Reading

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Citations

Dec 8, 2020·Veterinary World·Rafael Enrique Castro-VargasIang Schroniltgen Rondón-Barragán
Jan 2, 2021·Antibiotics·Marie Paule NgogangMarianne Antonia Bernada van der Sande
Jul 3, 2021·Journal of Fungi·Rafael Dorighello CadamuroGislaine Fongaro

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Methods Mentioned

BETA
electrophoresis

Software Mentioned

SPSS
BioNumerics

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Antimicrobial Resistance (ASM)

Antimicrobial resistance poses a significant threat to the continued successful use of antimicrobial agents for the treatment of bacterial infections.

Antimicrobial Resistance

Antimicrobial resistance poses a significant threat to the continued successful use of antimicrobial agents for the treatment of bacterial infections.