NAFB – USDA’s Food Safety and Inspection Service plans to monitor H5N1 influenza A in dairy cows at slaughter starting next month. FSIS will leverage its existing National Residue Program and conduct H5N1 sampling in the muscle samples of dairy cow carcasses already collected for the program. Samples will be tested by FSIS laboratory personnel using polymerase chain reaction testing. Carcasses sampled under the program are held by establishments pending residue testing results. This process will not require additional holding time for carcasses beyond current residue testing protocols. In the event of a positive H5N1 finding, USDA will work with industry to ensure the carcass does not enter the food supply. HPAI is a threat to the poultry industry, animal health, human health, trade, and the economy worldwide. Since the first detection of HPAI in dairy cattle in March 2024, USDA has worked to assess the prevalence of the virus in U.S. dairy herds.