HPAI

The Agriculture Department said its research agency “has begun to assess the potential to develop an effective vaccine” against the H5N1 bird flu virus in cattle, although it warned that it is too early to say how long the process would take. The virus has so far infected 29 dairy herds in eight states, though there have been no detections in commercial beef herds since the disease was identified in cattle in late March.

Michigan officials said the H5N1 bird flu virus has infected three additional dairy herds in the state, just as the USDA recommended farmers test their herds for the virus before moving cattle between states. The tests "should both give us more ... information and should mitigate further state-to-state spread between herds," said the USDA's animal health agency.

Dairy herds in Kansas and New Mexico are infected with the H5N1 bird flu virus, raising the U.S. total to 15 herds in six states, said the Agriculture Department on Thursday. Texas has the most infected herds, with seven, followed by Kansas with three and New Mexico with two.

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.

USDA scientists confirmed the bird flu virus in a dairy herd in Idaho on Tuesday — the 12th herd in five states — with Ohio appearing for the first time on the list of states with "presumptive positive" results that will be double-checked. Meanwhile, officials said a Texas egg farm suffered the largest U.S. outbreak of bird flu in four months.

A Texas patient tested positive for the bird flu virus after exposure to dairy cattle believed to be carrying the disease — the first known instance of cattle-to-human transmission in the United States, said public health officials on Monday. The patient reported eye redness, consistent with conjunctivitis, as the only symptom and was recovering, said the Centers for Disease Control.

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.

One-fourth of U.S. losses to bird flu in outbreaks that began in early 2022 were recorded in the past three months, when the viral disease staged a resurgence, according to USDA data released on Thursday. Some 20.9 million birds were culled in infected domestic flocks from October through December to prevent the spread of highly pathogenic avian influenza.

In an event that traditionally opens the holiday season in Washington, President Biden pardoned two Thanksgiving turkeys, briefly plugged his rural policies, and joked about his age — 81 — on Monday, his birthday. "I want you to know, it's difficult turning 60," he said, evoking laughter from a couple of hundred people on the South Lawn of the White House. "Difficult."

The Agriculture Department promotes comprehensive biosecurity measures on the farm as the "best and prudent approach" to combat bird flu outbreaks that have killed 58.6 million birds in domestic flocks in 13 months. The viral disease drove up egg prices during 2022 and, after a respite early this year, egg prices are on the rise again with the approach of Easter.