RESUMEN
OBJECTIVE: To analyze the prevalence and etiologic agent of Salmonella in livestock and poultry meats, so as to provide data support for controlling contamination and effectively tracing of Salmonella. METHODS: Livestock and poultry meats from 8 counties in Huaian from 2015 to 2016 were collected and analyzed for the occurrence of Salmonella according national testing standards. Then the serotype distribution, antimicrobial resistance, virulence gene and molecular subtyping traits of isolated strains were characterized. RESULTS: Of the total 368 samples, 37( 10. 05%) tested positive for Salmonella. And the positive rate of chicken, duck, pork, beef and mutton were 14. 14%( 14/99), 11. 11%( 10/90), 10. 34%( 12/116) and 1. 59%( 1/63), respectively. 37 Salmonella isolates were separated into 8 serotypes and the main serotypes wereSalmonella enteritidis and Salmonella typhimurium. The antimicrobial resistance test indicated Salmonella isolates showed highest resistance to ampicillin and nalidixic acid( 72. 97%), showed lowest resistance to cefoxitin( 8. 11%). And the resistance phenotypes of Salmonella isolates from different samples and serotypes were different. The carriage rate of inv H and sop E were highest in Salmonella enteritidis and the highest rates of inv H, sop E and rhu M in Salmonella typhimurium. PFGE showed that the pattern similarity of all Salmonella enteritidis was more than 81. 56% and the relationship between the strains with the same source was closer. PFGE pattern of Salmonella typhimurium were different. CONCLUSION: The contamination with Salmonella of livestock and poultry meats in Huaian was serious, and the main serotypes were Salmonella enteritidis and Salmonella typhimurium. Salmonella isolates showed high drug resistance and high carriage rate of virulence genes.