Three of America’s top milk-producing states aren’t a part of federal surveillance testing for bird flu even as a new variant is turning up in dairy cattle, in what some public health experts say is a troubling gap in the national effort to identify and detect the spread of the virus.
The U.S. Agriculture Department started a voluntary milk-testing program in December after the virus was found to have jumped to cattle in March. The recent outbreak of avian influenza in the United States was first detected in 2022, but has picked up steam over the last year, decimating poultry farms nationwide, killing tens of millions of birds and driving up the price of eggs.
While the risk to humans remains low, many public and animal health experts argue that broad, nationwide testing of milk is critical to containing virus cases that might otherwise go undetected, giving the variants more opportunities to spread to animals — and to humans.
By Suzy Khimm
February 11. 2025
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