Changes in the Phenotypes of Salmonella spp. in Japanese Broiler Flocks.

Autor:	Momose Y; Division of Biomedical Food Research, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan., Sasaki Y; Division of Biomedical Food Research, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan.; Division of Veterinary Science, Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan., Yonemitsu K; Management Department of Biosafety, Laboratory Animal, and Pathogen Bank, National Institute of Infectious Diseases, 4-7-1, Gakuen, Musashimurayama, Tokyo 208-0011, Japan., Kuroda M; Pathogen Genomics Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku,Tokyo 162-8640, Japan., Ikeda T; Department of Infectious Diseases, Hokkaido Institute of Public Health, Kita-19, Nishi-12, Kita-ku, Sapporo, Hokkaido 060-0819, Japan., Uema M; Division of Biomedical Food Research, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan., Furuya Y; Japan Food Safety Verification Organization, 1-7-5, Sekiguchi, Bunkyo-ku, Tokyo 112-0014, Japan., Toyofuku H; The United Graduate School of Veterinary Science, Yamaguchi University, 1677-1 Yoshida,Yamaguchi 753-8515, Japan., Igimi S; Department of Applied Biology and Chemistry, Tokyo University of Agriculture, 1-1-1, Sakuragaoka,Setagaya-ku, Tokyo 156-8502, Japan., Asai T; The United Graduate School of Veterinary Science, Gifu University, 1-1, Yanagido, Gifu, Gifu 501-1193, Japan.
Jazyk:	angličtina
Zdroj:	Food safety (Tokyo, Japan) [Food Saf (Tokyo)] 2024 May 31; Vol. 12 (2), pp. 25-33. Date of Electronic Publication: 2024 May 31 (Print Publication: 2024).
DOI:	10.14252/foodsafetyfscj.D-24-00001
Abstrakt:	Salmonella infections represent a leading cause of foodborne illnesses; resistance to third-generation cephalosporins (TGCs), which are a first-choice antimicrobial for treating human Salmonella enteritis, has become a serious public health concern worldwide. Because the consumption of undercooked chicken meat products is a major cause of foodborne salmonellosis in Japan, we conducted three surveys at different periods between 2017 and 2022, with the cooperation of four abattoirs (two in Eastern and two in Western Japan). The first survey was conducted at abattoir A, which is located in Eastern Japan. Salmonella was detected in 84.4% of broiler flocks tested (27/32); among them, all the TGC-resistant isolates obtained from one farm (farm FA) were identified as S. Infantis. Salmonella was recovered from 62.5% of breast meat samples (20/32), with one case suggesting cross-contamination. The second survey was conducted at three other abattoirs to examine the prevalence of TGC-resistant Salmonella , in both Western (abattoirs B and C) and Eastern (abattoir D) Japan. Salmonella was detected in 90.6% of broiler flocks examined (29/32). TGC-resistant S. Infantis was isolated from 2 flocks until 2018 and not thereafter. Subsequently, isolates were identified as TGC-susceptible S. Schwarzengrund in both regions. The third survey was performed at abattoir A to elucidate whether there were changes in the phenotypes. Of the 11 broiler flocks introduced from farm FA, 10 were positive for Salmonella (90.9%); all the isolates were S. Schwarzengrund susceptible to TGC. This study shows that TGC-susceptible S. Schwarzengrund has replaced the resistant phenotypes among broiler flocks in both Eastern and Western Japan. Although chicken meat products could be cross-contaminated with Salmonella during the slaughtering process, reducing the prevalence of Salmonella in broiler flocks remains important to decrease Salmonella enteritis in humans. Competing Interests: Conflict of Interest: The authors have no conflicts of interest to declare. (©2024 Food Safety Commission, Cabinet Office, Government of Japan.)
Databáze:	MEDLINE
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