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Antibiotic-resistant Escherichia coli isolated from dairy cows and their surrounding environment on a livestock farm practicing prudent antimicrobial use

On a livestock farm where antimicrobial administration and its history had been managed for prudent use of antimicrobials, we surveyed antibiotic-resistant Escherichia coli strains isolated from cow feces and the surrounding environment (i.e., rat and crow feces, and water samples from a drainage pi...

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Bibliographic Details
Published in:International journal of hygiene and environmental health 2022-03, Vol.240, p.113930-113930, Article 113930
Main Authors: Suzuki, Yoshihiro, Hiroki, Hayate, Xie, Hui, Nishiyama, Masateru, Sakamoto, Shinsuke H., Uemura, Ryoko, Nukazawa, Kei, Ogura, Yoshitoshi, Watanabe, Toru, Kobayashi, Ikuo
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Language:English
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Summary:On a livestock farm where antimicrobial administration and its history had been managed for prudent use of antimicrobials, we surveyed antibiotic-resistant Escherichia coli strains isolated from cow feces and the surrounding environment (i.e., rat and crow feces, and water samples from a drainage pit and wastewater processing tank) every month for 1 year. Two strains (1.7%) in cow feces were resistant to tetracycline, whereas all other strains were susceptible to all other antimicrobials. Among 136 strains isolated from cows and wild animals, only one ampicillin-resistant strain was identified. The antibiotic resistance rate in the drainage from the barn was 8.3% (10/120), and all strains showed susceptibility for 8 months of the year. Tetracycline resistance was common in all resistant strains isolated from animal feces and water samples; all tetracycline-resistant strains carried tetA. These results strongly support the proper use and management of antibiotics on farms to minimize the outbreak and spread of antibiotic-resistant bacteria.
ISSN:1438-4639
1618-131X
DOI:10.1016/j.ijheh.2022.113930