CDC通报苜蓿芽沙门氏菌疫情升至76人，FDA与农业部联合大肠杆菌调查病例增至38人
亚特兰大10月1日——据食品安全法律媒体LexBlog对联邦机构通报的汇总，美国疾病控制与预防中心（CDC）最新计数显示，苜蓿芽沙门氏菌疫情感染人数已升至76人；美国食品药品监督管理局（FDA）网页对同一疫情的计数一度仍显示55人，两机构数字尚未同步。FDA与农业部联合调查的另一起大肠杆菌疫情则从25人增至38人，涉事食品仍未公布。
同批联邦通报还显示，一起新的李斯特菌调查档案已开启，现有11名患者，涉事食品同样未命名。公共卫生专家指出，芽菜类食品因在温暖潮湿环境中催芽，种子表面或内部的细菌容易大量繁殖，是沙门氏菌等食源性病原体的高风险载体；监管机构对芽菜生产企业的抽检与种子批次追溯，通常是这类疫情调查的关键环节。
发病与就医提示方面，沙门氏菌感染症状通常在进食后6小时至6天出现，包括腹泻、发热与胃痉挛，多数在4至7天内缓解；婴幼儿、老年人与免疫力低下者出现脱水、高热不退等情况应尽快就医。CDC建议消费者留意召回公告，生吃芽菜前确认来源批次。
这也是本周联邦食源性疾病通报的一个缩影：已结案的疫情未能给出污染路径，仍在调查的疫情则未公布涉事食品。监管机构表示，食品命名需要在流行病学证据达到门槛后才进行，以免误伤无关产品；消费者在此期间能做的，是保留购物凭证与包装，一旦召回公布即可按批次核对。
信息来源：LexBlog 10月3日周末综述对CDC、FDA截至10月1日前后通报的汇总。
图片来源：To Your Health Sprouted Flour — cheeseslave / CC BY 2.0 (via Openverse)
CDC Counts 76 in Alfalfa Sprout Salmonella Outbreak; Joint FDA-USDA E. coli Probe Rises to 38 Cases
ATLANTA, Oct. 1 — The Centers for Disease Control and Prevention now counts 76 illnesses in an alfalfa sprout Salmonella outbreak, while the Food and Drug Administration's page for the same outbreak still listed 55, according to a LexBlog roundup of federal postings. A joint FDA-USDA E. coli investigation rose from 25 to 38 sick with no food named, and a new Listeria file opened at 11 cases, also with no food identified.
Sprouts are a recognized high-risk vehicle for foodborne pathogens: seeds are germinated in warm, humid conditions in which bacteria on or inside the seed can multiply rapidly. In past investigations, testing of seed lots and traceback through sprouting facilities have been the decisive steps in identifying the source.
Salmonella symptoms usually appear six hours to six days after eating contaminated food and include diarrhea, fever and stomach cramps lasting four to seven days. Infants, older adults and people with weakened immunity should seek care promptly for dehydration or persistent high fever. The CDC advises consumers to watch for recall notices and to check the source lot before eating raw sprouts.
The pattern fits this week's federal foodborne-illness postings as a whole: closed outbreaks ended without a contamination route, while open ones carry no named food. Officials say foods are named only after epidemiological evidence passes a threshold, to avoid implicating unrelated products; in the meantime, consumers are advised to keep receipts and packaging so lots can be checked the moment a recall posts.
Source: LexBlog weekend wrap-up, Oct. 3, summarizing CDC and FDA postings through Oct. 1.
Photo: To Your Health Sprouted Flour — cheeseslave / CC BY 2.0 (via Openverse)
图片来源：图：苜蓿芽特写。摄影：Buelldm，CC BY-SA 3.0，来源：Wikimedia Commons
