The mandate targeting bulk milk transporters and dairy processors is meant to help identify herds that have caught the virus, which has spread among livestock.Get more news
In addition to the testing mandate, the order requires dairy herd owners with cattle that test positive for bird flu to provide information that can help with surveillance.
The USDA previously issued a federal order in April that required lactating dairy cows to be tested for bird flu before being shipped across state lines, and required private labs and state veterinarians to report positive cases based on those tests. Those requirements remains in place under the new order as well.
The order responds to renewed urgency to address the rapid spread of bird flu among livestock in recent months, which scientists worry could eventually pose a more widespread risk to human health.
Drinking raw, or untreated, milk has risen in popularity, despite warnings from the Centers for Disease Control and Prevention that it might be possible to contract bird flu that way. Several studies have shown that commercial pasteurization — using heat to treat milk — inactivates the virus, making milk that’s safe for consumption.
The Food and Drug Administration regulates the sale of raw milk across state lines, but as many as 30 states allow it to be sold locally.
In November, California health officials detected bird flu in multiple batches of raw milk from a local dairy farm. On Tuesday, the California Department of Public Health announced a broad recall of the farm’s raw milk and cream on retail shelves — though no human bird flu cases have been linked to the products.
To date, the CDC has confirmed 58 human cases of bird flu in the U.S. The vast majority were exposed to infected cattle or poultry. Arizona reported an additional two cases in poultry workers on Friday — the first in the state.
Symptoms so far have been mild, and often include pinkeye, coughs or sneezes. However, the CDC reported last month that some cases may be asymptomatic, so the agency recommends that anyone who has been exposed to bird flu get tested.
Research on dairy farms has shown the virus spreads efficiently between mammals, including from cows to other species like raccoons and cats. Scientists think the virus likely spreads between farm animals through raw milk, because infected cows shed large amounts of the virus through their mammary glands.
There is no evidence yet that people can pass bird flu to each other, but scientists are concerned that H5N1 might evolve in that direction, which could lead to the next human pandemic.
Источник: www.nbcnews.com
