1. Xixiang Preventive Health Care Center of Baoan District, Shenzhen, Guangdong 518102, China; 2. Yantian District Center for Disease Control and Prevention, Shenzhen, Guangdong 518081, China
Abstract：Objective To epidemiologically investigate and analyze a Salmonella food poisoning incident occurring in a community cake shop, to identify the pathogenic factors, poisoned food and the sources of contamination, and to provide references for preventing the similar incident in future. Methods Field epidemiological investigation, food hygiene investigation and laboratory testing were used in this survey. Result A total of 14 clinical cases were found in this incident and their clinical symptoms, mainly including diarrhea, abdominal pain, fever and vomiting, were similar. The median incubation period was 9.25 hours (3.2-14.6 hours). All the cases had eaten sandwich selling from HG cake shop before the attack, and an analysis of dose-response relationship showed that there was a correlation between the amount of sandwich eaten and the severity of disease(r=0.583, P=0.029). Salmonella enteritidis was isolated from the anal swabs, vomit and feces of the clinical cases as well as from the remaining sandwiches and the raw materials for sandwiches. Pulsed-field gel electmphoresis (PFGE) molecular typing analysis showed that the positive strains isolated from different source samples were homologous. Conclusion This is a food poisoning incident caused by eating Salmonella-contaminated sandwiches made by and sold at a community cake shop
2019, Vol. 26 
