FDA结案美国史上最大环孢子虫疫情：12,883人感染，寄生虫在Taylor Farms墨西哥工厂废水中检出
华盛顿10月2日——据食品安全法律媒体LexBlog报道，美国食品药品监督管理局（FDA）10月2日结束对美国有记录以来最大规模环孢子虫（Cyclospora）疫情的调查：共12,883人感染。FDA首次公布，其在Taylor Farms墨西哥加工厂外排废水水箱以及一名供货种植户的排水沟中检出了该寄生虫。涉事产品为此前已被召回的冰山生菜。
同一天下午，FDA还结案了一起辣椒沙门氏菌疫情，共488人感染，种植者被追溯至墨西哥一州，但污染路径始终未能查明。此前一天，CDC结案冷冻血蚶甲型肝炎疫情，共37人感染、30人住院，进口商始终未被点名。三起结案合计涉及13,408名患者，而三份结案文件都没有写明病原体究竟如何进入食物。
Taylor Farms方面表示，没有任何生菜样本检出环孢子虫阳性，并称公司支持召回决定。CDC的公开调查方法说明指出，暴发关联可由流行病学、追溯与食品或环境检测三类证据建立；当多名患者的共同供应链交汇点明确时，即使食品样本未检出，监管机构也可据流行病学证据采取行动。
信息来源：LexBlog 10月3日周末综述及10月4日对Taylor Farms回应的后续报道，引述FDA与CDC结案文件。
图片来源：Lettuce Mini Heads — photofarmer / CC BY 2.0 (via Openverse)
FDA Closes Largest Cyclospora Outbreak on Record: 12,883 Sick, Parasite Found in Taylor Farms Mexico Wastewater
WASHINGTON, Oct. 2 — The Food and Drug Administration on Friday closed its investigation of the largest Cyclospora outbreak ever recorded in the United States, with 12,883 people sick, according to LexBlog's review of the closing files. For the first time, the FDA said where it found the parasite: in a tank of wastewater leaving the Taylor Farms de Mexico processing plant, and in a drainage ditch at a grower that supplied it. The recalled product was iceberg lettuce.
The same afternoon, the FDA ended a jalapeño Salmonella outbreak at 488 sick, with a grower traced to a Mexican state and no route of contamination identified. The day before, the CDC closed a hepatitis A outbreak in frozen blood clams at 37 sick and 30 hospitalized, with the importer never named. The three closed files cover 13,408 illnesses, and none states how the pathogen got into the food.
Taylor Farms says no lettuce tested positive for Cyclospora, while standing behind the decision to recall. The CDC's published methods note that an outbreak link is built from epidemiology, traceback and food or environmental testing, and that officials can act on strong epidemiological evidence alone when cases converge on a common point in the supply chain.
Source: LexBlog, Oct. 3 weekend wrap-up and Oct. 4 follow-up on the Taylor Farms response, citing FDA and CDC closing documents.
Photo: Lettuce Mini Heads — photofarmer / CC BY 2.0 (via Openverse)
图片来源：Lettuce Mini Heads — photofarmer / CC BY 2.0 (via Openverse)
