South East Regional Epidemiology Unit, Health Protection Agency, 151 Buckingham Palace Road, London, UK.
Epidemiol Infect. 2012 Oct;140(10):1748-56. doi: 10.1017/S0950268811002615. Epub 2011 Dec 14.
Seventy-five individuals with Salmonella infection were identified in the Portsmouth area during August and September 2009, predominantly Salmonella Enteritidis phage type 8. Five patients were admitted to hospital. A case-case comparison study showed that a local restaurant was the most likely source of the infection with a risk of illness among its customers 25-fold higher than that of those who did not attend the restaurant. A case-control study conducted to investigate specific risk factors for infection at the restaurant showed that eating salad was associated with a threefold increase in probability of illness. Changing from using ready washed lettuces to lettuces requiring washing and not adhering strictly to the 48 hours exclusion policy for food handlers with diarrhoea were likely to have contributed to the initiation and propagation of this outbreak. Possibilities for cross-contamination and environmental contamination were identified in the restaurant.
2009 年 8 月至 9 月期间，朴茨茅斯地区发现了 75 名沙门氏菌感染病例，主要为肠炎沙门氏菌噬菌体型 8。5 名患者住院治疗。病例对照研究显示，当地一家餐馆极有可能是此次感染的源头，其顾客的患病风险比未到该餐馆就餐的人高 25 倍。为调查该餐馆感染的具体危险因素而开展的病例对照研究显示，食用沙拉会使患病的概率增加两倍。从使用已清洗好的生菜改为使用需要清洗的生菜，以及未能严格遵守对出现腹泻症状的食品处理人员实施 48 小时隔离政策，可能导致了此次暴发的启动和传播。在该餐馆发现了交叉污染和环境污染的可能性。
