Maryland health officials have issued a statewide advisory urging consumers, retailers, and restaurants to avoid all cheese products made by Clover Hill Dairy in Mechanicsville due to an ongoing risk of Listeria contamination. The Maryland Department of Health expanded its consumer warning and suspended the facility’s operating license on May 30, 2026, following investigations into a foodborne illness outbreak. The dairy has initiated a voluntary recall of all its cheese products, which are sold through its retail market, farmers markets, and third-party distributors across several states, including Maryland, Virginia, New York, New Jersey, North Carolina, and Washington, D.C.

Health authorities warn that some products may be relabeled under different brand names such as KESSO, QUESOS LA RICURA, IZALCO, DE MI PUEBLO, and RIO LINDO, making identification difficult. Consumers are advised to check packaging for the manufacturer permit number '24-128' to confirm origin. All soft, semi-soft, hard, smoked, flavored, and pepper varieties produced by the facility are included in the recall, including popular items like Cuajada, Ricotta, Pepper Jack, and Old Bay Cheddar.

Whole genome sequencing has linked the Listeria monocytogenes strain to nine confirmed infections across multiple states, including one fatal case in Maryland from 2023. Listeria can grow even under refrigeration and can spread to other foods and surfaces, posing risks beyond direct consumption. High-risk groups, including pregnant individuals, older adults, and those with weakened immune systems, are especially vulnerable. The department continues its evaluation in coordination with the facility, urging proper disposal of any existing stock.