The U.S. government on Friday ordered testing of the nation’s milk supply for bird flu to better monitor the spread of the virus in dairy cows.
from dairy farms and processors nationwide must be tested on request starting Dec. 16, the U.S. Department of Agriculture said. Testing will begin in six states — California, Colorado, Michigan, Mississippi, Oregon and Pennsylvania.
Colorado, however, already ordered licensed dairies last July to begin submitting weekly samples of their milk to the state for testing, though it excluded dairies that sell raw milk as part of a “cow share” program, because they aren’t state-regulated.
The Colorado Department of Agriculture on Friday said the state meets the USDA’s criteria for demonstrating an “ongoing absence” of bird flu in dairy cattle through the current testing plan.
“USDA is supporting Colorado’s already existing program with additional weekly bulk milk tank testing,” said Olga Robak, a spokesperson for the state Department of Agriculture.
Officials said the USDA’s national move is aimed at “containing and ultimately eliminating the virus,” known as Type A H5N1, which was detected for the first time in March in U.S. dairy cows.
Since then, more than 700 herds have been confirmed to be infected in 15 states. That includes more than 60 herds in Colorado, though only one remains quarantined, according to the state agriculture department.
“This will give farms and farmworkers better confidence in the safety of their animals and ability to protect themselves, and it will put us on a path to quickly controlling and stopping the virus’ spread nationwide,” Agriculture Secretary Tom Vilsack said in a statement.
The risk to people from bird flu remains low, health officials said. Pasteurization, or heat treatment, kills the virus in milk, leaving it safe to drink.
Veterinarians, farmers, scientists and academics have been calling for nationwide milk testing for months, said Keith Poulsen, director of the Wisconsin Veterinary Diagnostic Laboratory, who led the efforts.
“Itap another step in the right direction,” Poulsen said. “They’re coming around that we need a better handle on it.”
Dairy farmers and processors across the U.S. have been reluctant to test animals or milk for the virus, fearing economic or other repercussions. Jamie Jonker, chief science officer of the National Milk Producers Federation, said the industry supports USDA efforts to eliminate the virus.
Under the federal order, dairy farmers and those who handle raw milk intended for pasteurization must provide samples of the milk on request for testing for bird flu. It requires reporting of positive tests to the USDA and it requires herd owners to provide basic information to allow tracing of the disease in cattle.
The move follows an that mandated testing of certain dairy cattle before they could move between states and required reporting of any positive tests. Despite that order, the virus has continued to spread, Poulsen noted.
from infected cows contains high loads of live virus, testing has shown.
At least 58 people in the U.S. — including 10 in Colorado — have been infected with bird flu, mostly farm workers who became mildly ill after close contact with infected cows, including their milk, or infected poultry.
Colorado poultry farmers have killed millions of chickens this year following outbreaks, according to state data.
Bird flu has also been spreading among wild birds and a number of other animals.
Federal officials continue to warn against drinking raw milk, which can contain a host of germs that make people sick. In California, a farm and halted distribution of milk after bird flu virus was detected in raw milk sold in stores. Raw Farm of Fresno issued a voluntary recall of raw milk and cream produced after Nov. 9.
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