美国食品药品监督管理局（FDA）宣布，此前在冰山生菜样本中检出环孢子虫的结果为假阳性，确切感染源仍未确定 [1]。尽管源头未明，供应商泰勒农场（Taylor Farms）已自愿从美国市场撤下所有来自墨西哥中部地区的冰山生菜 [1]，并列出受影响产品清单。FDA指出被检测的样本并非泰勒农场周五宣布的当前召回产品的一部分 [1]。
这场疫情已在美国五个州引发广泛传播 [1][2]。根据疾控中心（CDC）报告，密歇根州报告超过5,000例病例，北卡罗来纳州报告超过300例 [2]。受影响的州包括印第安纳、肯塔基、密歇根、俄亥俄和西弗吉尼亚 [1][2]。目前至少有94人因环孢子虫病住院，但无死亡报告 [1]。
快餐连锁泰可钟（Taco Bell）已在其餐厅完成受影响生菜产品的清除工作 [1]，并已无限期从全国供应链中移除该受影响成分，将在24小时内更换 [2]。CDC建议上述五个州居民不要食用泰可钟提供的碎冰山生菜 [1]。
The U.S. Food and Drug Administration announced that a previous test identifying iceberg lettuce from supplier Taylor Farms as the source of a cyclospora parasite outbreak was a false positive, leaving the actual source of the infection still undetermined [1]. Despite the inconclusive test result, Taylor Farms voluntarily withdrew all iceberg lettuce sourced from central Mexico from the U.S. market [1][2], and fast-food chain Taco Bell has completed removal of affected products from its restaurants [1].
The cyclospora outbreak has affected at least five states—Indiana, Kentucky, Michigan, Ohio, and West Virginia [1][2]. Michigan has reported over 5,000 cases, while North Carolina has reported over 300 cases [2]. At least 94 people have been hospitalized due to cyclospora infection, though no deaths have been reported [1].
The Centers for Disease Control and Prevention warned consumers in the affected states to avoid shredded iceberg lettuce provided by Taco Bell [1]. Taco Bell stated it has indefinitely removed the affected ingredient from its national supply chain and will replace it within 24 hours [2].
The FDA clarified that the recalled sample tested was not part of Taylor Farms' current recall announcement [1]. Taylor Fresh Foods, the company linked to the outbreak, confirmed that an associated independent farm in Mexico was identified as connected to the contamination [2].