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| Prevalence, Distribution and Diversity of Salmonella in Raw Beef Production |
| ZHANG Haoqi, CUI Zhonglei, MAO Yanwei, DONG Pengcheng, ZHOU Guanghui, HAN Guangxing, XIAO Yang, ZHANG Yimin |
| 1. College of Food Science and Engineering, Shandong Agricultural University, Tai’an 271018, China; 2. Linyi Comprehensive Experimental Station, National Beef Cattle Industrial Technology System, Linyi 276000, China; 3. Baoding Comprehensive Experimental Station, National Beef Cattle Industrial Technology System, Baoding 071000, China |
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Abstract Salmonella is a foodborne pathogen that causes human diseases worldwide, and the consumption of contaminated meat products is an important cause of salmonellosis. The prevalence, contamination distribution, virulence genes, antibiotic resistance and traceability analysis of Salmonella from nine sampling sites in two beef slaughterhouses was investigated. A total of 435 samples were collected, out of which 18 (4.1%) were found positive for Salmonella. The prevalence was highest in hides (9.1%, 5/55), followed by feces (7.3%, 4/55). A total of 47 Salmonella isolates were collected from 18 positive samples, and two serotypes were detected, namely Salmonella Typhimurium (53.2%, 25/47) and Salmonella Paratyphi B (46.8%, 22/47). The strains were resistant to most antibiotics with a multidrug resistance rate of 80.85% (38/47). Multilocus sequence typing (MLST) showed that 47 strains of Salmonella produced a total of two sequence types, with a high possibility of cross-contamination between production chains. This study has revealed the key contamination links and transmission routes of Salmonella in the entire chain of beef cattle slaughter and processing, providing a scientific basis for formulating precise prevention and control measures for Salmonella.
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| [1] |
LIU Liang, LI Bingbing, LI Jie, LI Shuangshu, SUN Min, YANG Pengfei, XING Yadong, CHEN Dawei. Analysis of Serotypes, Drug Resistance and Virulence Factors of Salmonella in Raw Meat by Genome-Wide Sequencing[J]. Meat Research, 2024, 38(4): 23-29. |
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2026, Vol. 40 
