(https://www.cnbc.com/2026/07/13/outbreak-of-diarrhea-causing-parasite-grows-to-more-than-1000-cases.html) is a margin killer for discount retailers that rely on private label penetration to differentiate. Costco already crushed margins to 2.1% by fighting commodity deflation — now imagine forced recalls on store brands, liability exposure, and consumer flight back to trusted national brands.

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