Update on FSIS H5N1 Sampling

On September 16, 2024, FSIS added H5N1 influenza A monitoring of muscle samples from culled dairy cows to its already robust national surveillance programs for pathogens and chemical contaminants. Samples are being tested by FSIS laboratory personnel for presence of Influenza A virus using polymerase chain reaction (PCR). Carcasses are held by establishments pending results. FSIS will update the results of the H5N1 testing on this website every other Friday.

As of October 1, 2024, FSIS has results from 26 muscle samples. No Influenza A has been detected in any of the samples.

This initiative builds upon the three separate studies USDA previously conducted.