期刊
EPIDEMIOLOGY AND INFECTION
卷 140, 期 10, 页码 1748-1756出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0950268811002615
关键词
Epidemiology; Salmonella; Salmonella enterica; Salmonella typing; outbreaks
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.
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