The Food and Drug Administration (FDA) recently sent warning letters to three U.S. dairy farms because they violated drug residue rules involving antibiotics. Penicillin was the culprit in all three cases.
Vansridge Dairy in Scipio Center, N.Y., received a warning because of the August 2015 sale of a dairy cow that showed penicillin residue in her kidneys above the legal tolerance level of 0.05 ppm established by the FDA.
Additionally, a Tulare, Calif., calf ranch was accused of giving sterile penicillin G procaine without veterinary recommendation for use. The animals tested from the facility showed residues of the drug after harvest.
The third farm to receive a warning is a repeat offender. Records show this is the third time FDA has warned Hawk Dairy Farm in Minerva, Ohio, about drug residues. This time, the farm sold a cow for slaughter with penicillin residue present at 0.63 ppm, far exceeding the minimum tolerance, according to USDA's Food Safety Inspection Service.
FDA says all of the farms failed to keep accurate treatment records, which could have decreased the likelihood the residues would have entered the food supply.