Helen Branswell covers issues broadly related to infectious diseases, including outbreaks, preparedness, research, and vaccine development. Follow her on Mastodon and Bluesky. You can reach Helen on ...

A national outbreak of bird flu is spreading among dairy cows in at least nine states, but Arizona farms haven't yet detected any cases. H5N1, a strain of highly pathogenic avian influenza, is the ...

The Arizona Department of Agriculture (AZDA) recently confirmed the first bird flu genotype D1.1 detection in milk from a dairy herd in Maricopa County. As a protective measure, the dairy farm is ...

Avian influenza has killed millions of birds and caused egg prices to soar since it first emerged in U.S. poultry in 2022. The virus has since jumped to mammals and even people. The Centers for ...

Cattle is one of the original Five C's of Arizona's economy, and while the number of ranchers has declined, the business continues to survive in remote areas of the state. The Brown family began ...

A new version of the H5N1 bird flu virus has been detected in milk samples collected from dairy herds in Nevada. The strain, known as D1.1, had so far been associated only with migrating birds and ...

As one of Arizona's Five C’s, the cattle business has historically stood as a key economic driver alongside cotton, citrus, copper and climate. Settlers were drawn to Arizona to establish ranches in ...