MINNEAPOLIS (WCCO) — Minnesota health officials are investigating after dozens of people fell sick at an Ecuadorian festival in Minneapolis earlier this month.

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At least 81 people have been hospitalized for severe gastrointestinal symptoms after eating guinea pig meat served by one of the festival’s vendors.

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The Minnesota Department of Health said many of those people tested positive for salmonella poisoning.

Officials have not identified the vendor.

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The August 11 festival was in celebration of Ecuadorian Independence Day. It took place at the New York Plaza Produce on the 1300 block of East Lake Street.