The U.S. Department of Agriculture (USDA) has mandated a new policy requiring bird flu testing in the country’s milk supply. This step comes as researchers raise alarms about the H5N1 bird flu virus, which is believed to be just one mutation away from becoming more transmissible to humans.
The USDA announced the decision on Friday, highlighting the collaboration with state, veterinary, and public health officials in shaping this directive. According to the agency, the policy aims to ensure extensive monitoring of the virus in dairy herds and milk supplies across the nation.
Under the federal order, dairy farms, milk transporters, processing facilities, and transfer stations must provide raw milk samples for testing if requested. Herd owners with confirmed infections will also need to supply detailed information for contact tracing and disease surveillance. Additionally, private labs and state veterinarians must report any positive test results to the USDA.
The first wave of testing is set to begin the week of December 16 in six states: California, Colorado, Michigan, Mississippi, Pennsylvania, and Oregon. These states were selected despite not all having reported cattle infections, as federal investigators seek a clearer picture of the virus’s spread.
Concerns about human exposure to the virus have intensified. On the same day the USDA announced its milk-testing mandate, Arizona reported its first human infections linked to bird flu. Two individuals who worked at a poultry facility in Pinal County experienced mild symptoms and later recovered. Similar cases have been identified in other states.
The CDC has also called for expanded testing of farm workers following recent findings of undetected cases among humans. These developments emphasize the importance of monitoring zoonotic diseases, which can jump from animals to humans.
Public health officials have voiced concerns about inconsistent federal responses to the bird flu crisis. As new measures are rolled out, experts stress the need for ongoing surveillance and preparedness to protect public health.
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