Two foodborne disease outbreaks caused by Salmonella putten

Objective To retrospectively analyze 2 foodborne disease outbreaks caused by Salmonella putten in Hefei, and we explore the relationship and causes of the 2 outbreaks, so as to provide scientific basis for the prevention and treatment of similar outbreaks in the future. Methods Field epidemiological surveys were conducted on the patients found in the outbreaks, hygienic surveys were conducted in the places where the outbreaks happened, the results were analyzed by descriptive analysis, specimens of surplus food, suspicious food and anal swabs of patients were collected for microbiological testing, the homology of strains was analyzed by pulsed-field gel electrophoresis (PFGE). Results Five cases were found in the outbreak A, and 6 cases were found in the outbreak B, all cases had eaten a same brand of braised chicken in the outbreak, the main clinical manifestations were diarrhea, fever, headache, nausea, some patients had abdominal pain and vomiting; the total viable counts of the same batch unopened food was 3.0×10 8 CFU/g, and the coliform counts was 3.5×10 7 CFU/g; The Salmonella putten was detected from 1 surplus food, 1 suspicious same batch unopened food, and 6 anal swabs of cases, which had homology by PFGE molecular typing analysis, there were 7 strains of the Salmonella putten, with a similar scale of 100%, and 1 strain of another suspicious same batch unopened food, with a similar scale of 94.64%, with high homology. Conclusion Combined with field epidemiological surveys, hygienic surveys, clinical manifestations and microbiological testing results, the two events were foodborne disease outbreaks caused by the same Salmonella putten. 摘要： 目的 回顾性分析合肥市接连调査的两起普顿沙门菌引起的食源性疾病事件, 探讨两起事件发生的联系与 原因, 为今后预防和处置类似事件提供科学依据。 方法 对在事件发生地搜索到的患者进行现场流行病学调査, 事件 发生地开展现场卫生学调査, 调査结果采用描述性分析; 采集剩余食品、可疑食品及病例肛拭子标本进行微生物学检 验, 运用脉冲场凝胶电泳(PFGE), 分析菌株的同源性。 结果 A事件发现5例病例, B事件发现6例病例, 所有病例均曾 在事件中食用过某同一品牌烧鸡, 主要临床表现为腹泻、发热、头痛、恶心, 部分病例伴有腹痛、呕吐; 可疑食品同批次 未拆封食品中的菌落总数测定结果为3.0×10 8 CFU/g, 大肠菌群计数结果为3.5×10 7 CFU/g;在1份剩余食品、1份可疑食 品同批次未拆封食品、份病例肛拭子中均检出普顿沙门菌, 经PFGE分子分型分析, 7株普顿沙门菌分子分型图谱相似 度为100%, 另1份可疑食品同批次未拆封食品中检出的普顿沙门菌分子分型图谱与其余7株相似度为94.64%, 具有髙 度同源性。 结论 结合现场流行病学调査、现场卫生学调査、病例临床表现及实验室检验结果综合分析, 两起事件均 是由于患者食用了同一品牌变质烧鸡, 由同一种普顿沙门菌引起的食源性疾病事件。