Bird flu spreads among California dairy herds
Five of the six dairy herds infected with the H5N1 avian flu virus this month are in California, all in the past week and all in the Central Valley. State officials said those herds were part of a group of farms targeted for testing because of outbreaks in three other herds at the end of August.
Bird flu takes a summer break
Outbreaks of highly pathogenic avian influenza (HPAI) in poultry and dairy cattle have dropped off sharply in recent weeks, according to USDA databases. There was a similar but longer lull a year ago in bird flu, which has become the largest animal disease event in American agriculture, killing nearly 101 million birds in domestic flocks since it appeared in the United States in February 2022. (No paywall)
Milk tank tests find 10 Colorado herds infected with bird flu
Ten new outbreaks of bird flu were found in Colorado dairy herds as the result of mandatory testing of milk samples from bulk tanks on the farms, reported the state’s Agriculture Department. The state veterinarian ordered the weekly tests in an effort to curb the spread of the H5N1 avian flu virus in the dairy and poultry industries.
Two of every three U.S. dairy farms vanished in a generation, but milk production rose by a third
California and Wisconsin still dominate U.S. milk production, accounting for one-third of total output, but the dairy industry went through a substantial restructuring in the past 20 years, said USDA analysts.
Bird flu spreads among Colorado farmworkers, with nine infected in two weeks
Nine farmworkers at two egg farms in Colorado have contracted mild cases of bird flu since mid-July while killing and disposing of millions of infected chickens, said public health officials on Thursday. “These preliminary results again underscore the risk of exposure to infected animals,” said the Centers for Disease Control, which added that the risk to the general population remains low.
Colorado orders weekly bulk-milk tests for H5N1 virus
Colorado is the first state in the nation to require dairy farmers to submit a weekly sample of milk to be tested for the H5N1 avian flu virus — “the best next step” to protect its poultry and dairy industries from bird flu, said Maggie Baldwin, the state veterinarian.
Seventh poultry worker in Colorado with bird flu
An additional worker became infected with the H5N1 avian flu virus while culling sick hens at a Colorado egg farm, said state public health officials, raising the U.S. total of infected workers to 11, all with mild symptoms. Eight of the cases, seven involving poultry and one involving dairy, have occurred in Colorado.
FDA says milk-processing practices kill H5N1 virus
A first-of-its-kind study that simulated commercial milk processing "found that the most commonly used pasteurization time and temperature requirements were effective at inactivating the H5N1 (avian flu) virus in milk," said the Food and Drug Administration. "These results establish that HTST (high temperature short time) pasteurization is effective at eliminating the virus from milk with a large margin of safety."
Few dairy farmers seek bird flu funds from USDA
Only a handful of U.S. farms — 18 in all — are accepting federal funds to quash the outbreak of the H5N1 avian flu virus among dairy herds that began three months ago, according to the Agriculture Department. (No paywall)
In a first, farmworker infected with bird flu has respiratory symptoms
A farmworker in Michigan is the first person to experience respiratory symptoms after contracting bird flu from dairy cows infected with the H5N1 virus, said Michigan officials on Thursday. It was the third U.S. case of cow-to-human transmission and the second in Michigan. The Centers for Disease Control said the risk to the general public remained low.
USDA and HHS allot $199 million to quash bird flu threat to cattle and humans
The Biden administration poured $199 million into the fight against the H5N1 bird flu virus, which was identified in cattle for the first time seven weeks ago, a worrisome step closer to people. Agriculture Secretary Tom Vilsack said dairy farmers are eligible for up to $28,000 in USDA aid in three months to help eradicate the virus from their herds, and Health Secretary Xavier Becerra announced new funding among public health agencies to "test, treat, prevent" the virus from spreading.
FDA: Bird flu viral fragments in milk were dead; pasteurization works
Although fragments of the H5N1 bird flu virus were found in one-fifth of milk purchased in grocery stores, a new round of high-precision testing "did not detect any live, infectious virus" and reaffirmed that the commercial milk supply is safe, said the FDA. (No paywall)
CDC: Bird flu virus lacks changes to make it a greater threat to people
Samples of the H5N1 bird flu virus that has infected dairy cattle and a dairy worker retain avian genetic characteristics and “for the most part lack changes that would make them better able to infect mammals,” said the Centers for Disease Control and Prevention in a technical update. “The overall risk to human health associated with the ongoing HPAI A(H5) outbreaks in poultry and detections in wild birds and cattle remains low,” said the CDC.
Bird flu found in dairy herds in five states
Bird flu, which killed more than 82 million birds in U.S. domestic flocks in the past two years, has appeared in dairy herds in Idaho, Kansas, Michigan, New Mexico, and Texas, said federal officials. The outbreaks, affecting a relatively small number of cattle, are not expected to affect milk supply or prices at the grocery store.
Pennsylvania dairies put the notion of climate-smart milk to the test
The U.S. dairy industry is aiming to go greenhouse gas neutral by 2050. Researchers have many ideas to help get them there — from feed additives that minimize methane-filled cow burps to new timing for fertilizer applications. But there’s little data on how well many of these strategies work on actual dairies with varying environmental conditions. (No paywall)
Bird flu found in dairy cows in Texas and Kansas
The USDA announced Monday that unpasteurized milk samples from sick cattle at two dairy farms in Kansas and one in Texas, as well as an oropharyngeal swab from another dairy in Texas, tested positive for Highly pathogenic avian influenza (HPAI).
House votes to make whole milk part of school lunches
The House passed, on an overwhelming 330-99 roll call on Wednesday, a bill that overrides USDA regulations to allow schools to serve whole milk as part of the school lunch program. “Let’s end the war on milk,” said Rep. Virginia Foxx, chair of the House Education and Workforce Committee.
Food makers say they will reduce methane emissions on dairy farms
Six major food companies, from General Mills to Danone, said at the UN climate summit that they will reduce their dairy methane emissions as part of a new alliance that includes a major U.S. environmental group. The Dairy Methane Action Alliance will require members to publicly disclose emissions within their dairy supply chains and implement a methane action plan.