The presence of highly pathogenic avian influenza (HPAI) virus in laboratory samples collected from some affected cows has been confirmed the U.S. Department of Agriculture (USDA), Food and Drug Administration (FDA), and Centers for Disease Control and Prevention (CDC). The discovery follows the agencies’ ongoing investigation into a disease event affecting predominantly older dairy cows in Texas, Kansas, and New Mexico.
The HPAI virus was detected in samples that included unpasteurized milk and oropharyngeal swabs collected from dairy farms in Texas, as well as two dairy farms in Kansas. This detection marks the initial occurrence of HPAI infection in dairy cattle, and only the second instance of the virus in a ruminant, according to a report by the American Veterinary Medical Association (AVMA).
“The first detection of HPAI in dairy cattle in Texas and Kansas underscores the importance of adherence to biosecurity measures, vigilance in monitoring for disease, and immediately involving your veterinarian when something seems ‘off,’” says Rena Carlson, DVM, president of the AVMA. “A complete evaluation, including the collection and submission of laboratory samples and reporting to state animal health officials when appropriate, and in a timely fashion, are incredibly important,” Dr. Carlson adds.
The USDA, FDA, and CDC confirm there are no current safety concerns regarding the commercial milk supply.
“While this finding of HPAI in dairy cattle is concerning for the health of those animals and their production in the herd, it is crucial to remember that according to the USDA, FDA, and CDC, the risk to our food supply and the public more broadly remains low,” says Dr. Carlson.
Cattle owners are advised to monitor their animals closely for signs of disease, which may include reduced feed intake and reduced milk production. Affected dairies have reported about 10 percent of their milking cows have become ill, but without confirmed deaths associated with the virus. Most cattle recover in two to three weeks with supportive care.
The AVMA urges producers to promptly report any illness or deaths in their herd to their veterinarian, who may coordinate with state animal health officials for further investigation and response.
For more information, visit the AVMA website.