The Michigan health department in the US contacted Taco Bell's parent company Yum Sheng Restaurant Group in early July about a parasitic outbreak. This was a few weeks before the company officially issued a warning to consumers. On July 2, the Michigan Department of Health and Human Services discussed the issue of cyclosporiasis with Yum's Catering Group and requested a connection with the company's supply chain quality assurance and public relations team. Taco Bell said the company acted quickly in accordance with Michigan's guidance to remove potentially affected ingredients from some stores, but the move was not publicly confirmed until July 14.

The Michigan health department in the US contacted Taco Bell's parent company Yum Sheng Restaurant Group in early July about a parasitic outbreak. This was a few weeks before the company officially issued a warning to consumers. On July 2, the Michigan Department of Health and Human Services discussed the issue of cyclosporiasis with Yum's Catering Group and requested a connection with the company's supply chain quality assurance and public relations team. Taco Bell said the company acted quickly in accordance with Michigan's guidance to remove potentially affected ingredients from some stores, but the move was not publicly confirmed until July 14.