Recently, three dairy farms based in the United States, and two food importers received warning letters from the Food and Drug Administration.

The warning letters sent to the dairy farms were for animal drug violations which included antibiotics usages, according to Food Safety News.

As for the food importers who brought in fish and juice from Sri Lanka and French Polynesia, they were found guilty of violations of US food safety regulations related to control programs and hazard analysis.

William W. Van Norstrand, owner of Vansridge Dairy in Scipio Center N.Y. reportedly received FDA warning letter about the sale of an animal, which had illegal drug residue for food.

FDA reportedly mentioned the August 2015 sale and slaughter of a dairy cow which showed 0.058 ppm (parts per million) penicillin residue in kidney tissue in an analysis completed by U.S. Department of Agriculture's Food Safety Inspection Service (FSIS).

Notably, the maximum tolerance level established by FDA is 0.05 ppm in uncooked yet edible tissues of cattle.

The second warning letter of FDA was issued to the five managing partners of Legacy Ranch #2, in Tulare, California concerning animal drug issue.

The dairy cows at the ranch were given injections of sterile Penicillin G and the ranch veterinarian's directives were not followed pertaining to the minimum withdrawal period before slaughter.

The third dairy firm to receive the warning letter was the Hawk Dairy Firm in Minerva, Ohio regarding penicillin residue.

As for the warning letters to S.A.R.L. Pacific Tuna in French Polynesia and Target Agriculture in Sri Lanka, the FDA mentioned that they should adapt to the regulations of the US on their products will be refused under the HACCP (Hazard Analysis and Critical Control Point) regulations.

S.A.R.L Pacific Tuna imports seafood to the US while Target Agriculture imports juices.