A cyclosporiasis outbreak traced to contaminated shredded iceberg lettuce has devastated quick-service restaurant chains across America, particularly impacting Taco Bell with significant customer traffic declines. The parasitic infection, which primarily affected Michigan residents, sparked widespread food safety concerns throughout the casual dining sector. Major chains including Chipotle, Panera, Chopt, and Sweetgreen experienced notable decreases in foot traffic, while Yum Brands' stock performance suffered considerably. This incident underscores critical vulnerabilities in produce supply chain management and highlights how foodborne illness outbreaks can rapidly erode consumer confidence in the entire restaurant industry.

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