Prevalence and profile of Salmonella from samples along the production line in Chinese beef processing plants

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• 作者：Pengcheng Dong ; Lixian Zhu ; Yanwei Mao ; Rongrong Liang ; Lebao Niu ; Yiming Zhang ; Ke Li ; Xin Luo
• 关键词：Beef ; Salmonella ; Prevalence ; Serotype ; Antimicrobial susceptibility
• 刊名：Food Control
• 出版年：April, 2014
• 年：2014
• 卷：38
• 期：Complete
• 页码：54-60
• 全文大小：646 K

文摘

This work investigated the prevalence of Salmonella, the serotypes and antibiotic resistance of the isolated strains from four beef processing plants of China. The prevalence of Salmonella in hide (n聽=聽70), feces (n聽=聽70), pre-evisceration carcass (n聽=聽70), post-evisceration carcass (n聽=聽70), post-washing carcass (n聽=聽70), chilled carcass (n聽=聽80), and raw meat (n聽=聽80) samples was 20.0%, 18.6%, 1.4%, 1.4%, 2.9%, 1.3%, and 1.3%, respectively. Among the four plants, there were significant differences in the prevalence of Salmonella on hides and in feces. During the processing, Salmonella was significantly reduced after hide removal. Seven serotypes of Salmonella were identified among the eighty-three isolates. Salmonella Agona was the dominant serotype (p聽<聽0.05, 53.0%), followed by Salmonella Senftenberg (16.9%), Salmonella Meleagridis (10.8%), and Salmonella Derby (9.6%). None of the isolated strains were found to be resistant to sixteen commonly used antimicrobial agents. The results of this study indicate that Salmonella contamination is common in samples along the production line, with S. Agona as dominant serotype. Specific measures should be taken to prevent and/or treat Salmonella contamination in corresponding products in Chinese beef processing plants. Furthermore, the current research might provide baseline information of Salmonella prevalence profile in Chinese beef processing plant, which could be used for the future study.