Bird Flu Detected in Oklahoma Cattle Herd

An Oklahoma dairy collected the samples in April when it suspected the herd might have been infected.

Cows graze in a field at a dairy farm in Petaluma, Calif., on April 26, 2024. Justin Sullivan/Getty Images

A herd of dairy cattle in Oklahoma has tested positive for bird flu, making it the 13th state with a confirmed infection in cows.

The Oklahoma Department of Agriculture, Food and Forestry first announced on July 12 that a sample has returned positive for H5N1, a strain of highly pathogenic avian influenza (HPAI).