A multistate Listeria outbreak linked to soft cheese has killed one person and hospitalized eight others, federal health officials confirmed. The outbreak — traced to requeson and soft ricotta-style cheeses produced by Clover Hill Dairy of Mechanicsville, Maryland — has been active for at least three years, with confirmed illness dates ranging from March 6, 2023, through May 2026.
On June 18, 2026, Clover Hill Dairy expanded its voluntary recall to include all of its cheese products after investigators found the Listeria outbreak strain in six samples of requeson cheese and in one environmental sample from the dairy's facility. The Maryland Department of Health has suspended the dairy's operating license.
