Hall N B, Chancey R J, Keaton A A, Heines V, Cantu V, Vakil V, Long S, Short K, Franciscus E, Wahab N, Gieraltowski L, Straily A
Texas Department of State Health Services, 1100 West 49th Street, Austin, Texas 78756.
Epidemic Intelligence Service, Division of Scientific Education and Professional Development (ORCID: https://orcid.org/0000-0002-6710-2015 [N.B.H.]).
J Food Prot. 2020 Feb 1;83(2):326-330. doi: 10.4315/0362-028X.JFP-19-254.
During July 2017, Texas public health officials noted an increase in the number of reported cyclosporiasis cases. They detected a cluster in the Houston metropolitan area that involved four locations of a Mediterranean restaurant chain, restaurant A. A case-control study was conducted among patrons of restaurant A to identify a common food vehicle among items containing fresh produce. In matched case-control ingredient-level analyses that included both probable and confirmed cases, consumption of green onions, red onions, tomatoes, and cabbage was significantly associated with illness. A substantial percentage of case patients reported consumption of green onions, and only green onions remained statistically significantly associated with illness, whether probable and confirmed cases were included in analyses (matched odds ratio: 11.3; 95% confidence interval: 2.5 to 104.7), or only confirmed cases were included in analyses (matched odds ratio: 17.6; 95% confidence interval: 2.5 to 775.7). These results provide evidence that green onions were the likely vehicle of infection. It was not possible to trace the green onions to their source due to the need to redirect public health resources to Hurricane Harvey response efforts in Texas.
2017年7月期间，得克萨斯州公共卫生官员注意到报告的环孢子虫病病例数量有所增加。他们在休斯敦都会区发现了一起聚集性病例，涉及一家地中海连锁餐厅A的四个分店。在餐厅A的顾客中开展了一项病例对照研究，以确定含新鲜农产品的食品中常见的感染载体。在匹配的病例对照成分水平分析中，纳入了可能病例和确诊病例，食用葱、红洋葱、西红柿和卷心菜与发病显著相关。相当比例的病例患者报告食用了葱，无论分析中纳入可能病例和确诊病例，还是仅纳入确诊病例，只有葱与发病仍存在统计学显著关联（匹配比值比：11.3；95%置信区间：2.5至104.7），或仅纳入确诊病例时（匹配比值比：17.6；95%置信区间：2.5至775.7）。这些结果证明葱可能是感染载体。由于需要将公共卫生资源重新调配用于得克萨斯州应对哈维飓风的工作，无法追踪到葱的来源。
