Surveillance of major foodborne pathogens in raw poultry meat and prepared meat products in Shanghai City in 2022

Abstract

ObjectiveTo analyze the contamination of Salmonella， Listeria monocytogenes （L. monocytogenes）， and Yersinia enterocolitica （Y. enterocolitica） in raw poultry meat and prepared meat products in Shanghai City.MethodsFrom January to August in 2022， 348 samples were collected from traditional markets， supermarkets， and restaurants in Shanghai City， including 240 raw poultry meat and 108 prepared meat products. The samples were evaluated for the presence of Salmonella， L. monocytogenes and Y. enterocolitica following national standard methods. All suspected isolates were further confirmed with the VITEK2 automatic biochemical identification method， and all Salmonella isolates were serotyped.ResultsThe detection rates of Salmonella， L. monocytogenes and Y. enterocolitica in raw poultry meat were 28.33% （68/240）， 5.00% （12/240）， and 0.83% （2/240）， respectively， and in prepared meat products were 5.56% （6/108）， 28.70% （31/108）， and 1.85% （2/108）， respectively. Serotyping results showed that 68 strains of Salmonella were distributed in 14 different serotypes in raw poultry meat， of which Salmonella Corvallis， Salmonella typhimurium， and Salmonella enteritidis accounted for 35.29%，16.18%， and 13.24%， respectively. Six strains of Salmonella in prepared meat products were distributed in three different serotypes. They were Salmonella enteritidis， Salmonella Kentucky， and Salmonella typhimurium accounted for 66.67%，16.67%， and 16.67%，respectively .ConclusionThe contamination rate of Salmonella and L. monocytogenes in raw poultry meat and prepared meat products in Shanghai City was high， which may cause foodborne diseases and more attention should be paid in the follow-up supervision.

Keywords

• raw poultry meat
• prepared meat products
• salmonella
• listeria monocytogenes
• yersinia enterocolitica
• surveillance
• foodborne pathogenic