The U.S. issued a federal order on Friday mandating that the national milk supply be tested for bird flu, Agriculture Secretary Tom Vilsack told Reuters, as authorities seek to grapple with rapid spread of the virus among dairy herds.

US issues order mandating bird flu testing of milk supply
Virus has infected nearly half of California's 1,100 dairy farms

Federal government pledges funds to bird flu research
The federal government has pledged $5.2 million in for 35 projects researching bird flu.

Virus in B.C. human bird flu case genetically related to farm strain
Health officials have confirmed that the strain of bird flu that hospitalized a B.C. teenager in critical condition is related to the same virus causing outbreaks in the province’s poultry.

U.S. poultry to face new rules at Canadian border
Canada is introducing new rules for U.S. bird and poultry shipments in an effort to curb highly pathogenic avian influenza spread.

US detects H5N1 bird flu in a pig for the first time
H5N1 bird flu was confirmed in a pig on a backyard farm in Oregon, the first detection of the virus in swine in the country, the U.S. Department of Agriculture said on Wednesday.

US confirms two human bird flu cases in Washington state
The U.S. Centers for Disease Control and Prevention on Thursday confirmed two of the four presumptive positive bird flu cases among poultry farm workers in Washington state.

Three new cases of bird flu in B.C. poultry
British Columbia has three new cases of highly pathogenic avian influenza (HPAI) among commercial poultry flocks in the Abbotsford and Chilliwack areas.

Bird flu cases presumed in four Washington farm workers, state says
Bird flu is presumed to have infected four poultry workers in Washington state, making it the sixth U.S. state to identify human cases this year, according to the Washington State Department of Health.

Cows dead from bird flu rot in California as heat bakes dairy farms
Cows in California are dying at much higher rates from bird flu than in other affected states, industry and veterinary experts said, and some carcasses have been left rotting in the sun as rendering plants struggle to process all the dead animals.

Two additional human bird flu cases confirmed in California
U.S. and California health officials confirmed two new cases of H5N1 bird flu in dairy farm workers in the state on Friday, bringing the total of infected dairy workers in that state to six, and the total of human cases nationwide this year to 20.