Greene S K, Daly E R, Talbot E A, Demma L J, Holzbauer S, Patel N J, Hill T A, Walderhaug M O, Hoekstra R M, Lynch M F, Painter J A
Division of Foodborne, Bacterial, and Mycotic Diseases, National Center for Zoonotic, Vectorborne, and Enteric Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
Epidemiol Infect. 2008 Feb;136(2):157-65. doi: 10.1017/S095026880700859X. Epub 2007 May 16.
Salmonella Newport causes more than an estimated 100,000 infections annually in the United States. In 2002, tomatoes grown and packed on the eastern shore of Virginia contaminated with a pan-susceptible S. Newport strain caused illness in 510 patients in 26 states. In July-November 2005, the same strain caused illness in at least 72 patients in 16 states. We conducted a case-control study during the 2005 outbreak, enrolling 29 cases and 140 matched neighbourhood controls. Infection was associated with eating tomatoes (matched odds ratio 9.7, 95% confidence interval 3.3-34.9). Tomatoes were traced back to the eastern shore of Virginia, where the outbreak strain was isolated from pond water used to irrigate tomato fields. Two multistate outbreaks caused by one rare strain, and identification of that strain in irrigation ponds 2 years apart, suggest persistent contamination of tomato fields. Further efforts are needed to prevent produce contamination on farms and throughout the food supply chain.
纽波特沙门氏菌在美国每年导致超过10万例感染。2002年，弗吉尼亚州东海岸种植和包装的番茄被一种对多种抗生素敏感的纽波特沙门氏菌菌株污染，导致26个州的510名患者患病。2005年7月至11月，同一菌株在16个州导致至少72名患者患病。我们在2005年疫情期间开展了一项病例对照研究，招募了29例病例和140名匹配的社区对照。感染与食用番茄有关（匹配优势比为9.7，95%置信区间为3.3 - 34.9）。番茄追溯到弗吉尼亚州东海岸，在那里从用于灌溉番茄田的池塘水中分离出了疫情菌株。由一种罕见菌株引起的两次多州疫情，以及相隔两年在灌溉池塘中鉴定出该菌株，表明番茄田存在持续污染。需要进一步努力防止农场以及整个食品供应链中的农产品污染。
