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Prevalence and antimicrobial resistance of Enterococcus spp. isolated from animal feed in Japan.

Authors :
Yamagami Y
Asao M
Takahashi A
Hashimoto Y
Okuyama N
Arai E
Arihara W
Masui R
Shimazaki Y
Source :
Frontiers in veterinary science [Front Vet Sci] 2024 Jan 24; Vol. 10, pp. 1328552. Date of Electronic Publication: 2024 Jan 24 (Print Publication: 2023).
Publication Year :
2024

Abstract

The rising prevalence of antimicrobial resistance (AMR) of bacteria is a global health problem at the human, animal, and environmental interfaces, which necessitates the "One Health" approach. AMR of bacteria in animal feed are a potential cause of the prevalence in livestock; however, the role remains unclear. To date, there is limited research on AMR of bacteria in animal feed in Japan. In this study, a total of 57 complete feed samples and 275 feed ingredient samples were collected between 2018 and 2020. Enterococcus spp. were present in 82.5% of complete feed (47/57 samples), 76.5% of soybean meal (62/81), 49.6% of fish meal (55/111), 33.3% of poultry meal (22/66), and 47.1% of meat and bone meal (8/17) samples. Of 295 isolates, E. faecium (33.2% of total isolates) was the dominant Enterococcus spp., followed by E. faecalis (14.2%), E. hirae (6.4%), E. durans (2.7%), E. casseliflavus (2.4%), and E. gallinarum (1.0%). Of 134 isolates which were tested for antimicrobial susceptibility, resistance to kanamycin was the highest (26.1%), followed by erythromycin (24.6%), tetracycline (6.0%), lincomycin (2.2%), tylosin (1.5%), gentamicin (0.8%), and ciprofloxacin (0.8%). All Enterococcus spp. exhibited susceptibility to ampicillin, vancomycin, and chloramphenicol. Of 33 erythromycin-resistant isolates, only two showed a high minimum inhibitory concentration value (>128 μg/mL) and possessed ermB . These results revealed that overall resistance to antimicrobials is relatively low; however, animal feed is a source of Enterococcus spp. It is essential to elucidate the causative factors related to the prevalence of AMR in animal feed.<br />Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.<br /> (Copyright © 2024 Yamagami, Asao, Takahashi, Hashimoto, Okuyama, Arai, Arihara, Masui and Shimazaki.)

Details

Language :
English
ISSN :
2297-1769
Volume :
10
Database :
MEDLINE
Journal :
Frontiers in veterinary science
Publication Type :
Academic Journal
Accession number :
38327814
Full Text :
https://doi.org/10.3389/fvets.2023.1328552