Pennsylvania's Department of Agriculture issued a quarantine Saturday for unpasteurized milk from Miller's Biodiversity Farm in Lancaster County.
Officials said products could be infected with a strain of the bacteria Brucella abortus.
They said consumers who bought unpasteurized cow's milk or dairy products should immediately discard the products.
According to the Department of Agriculture, at least one person in New York was sickened by the products.
Brucella abortus, also known as RB51, causes no symptoms in cattle, but can be spread from cattle to humans. Affected individuals may develop flu-like symptoms, fever, sweats, headaches, back pain, and physical weakness.