Dairy cattle alert - Avian influenza outbreak

USAgNet - 03/28/2024

Recent reports of unexplained illnesses in dairy cattle across several states have led to a concerning discovery: highly pathogenic avian influenza (HPAI) has been confirmed in affected dairy herds. While it's too early to determine the full extent of the outbreak, veterinarians, dairy industry stakeholders, and state and federal officials are working together to investigate and address the situation.

HPAI, typically associated with birds and poultry, has affected millions of birds across the United States since the outbreak began in 2022. Migratory birds, particularly wild waterfowl, are known carriers of the virus. However, the recent cases in dairy cattle mark only the second time HPAI has been identified in U.S. ruminants, with previous cases reported in goats in Minnesota.

Symptoms in affected dairy cattle include decreased feed intake and milk production, with approximately 10% of milking cows becoming ill. Fortunately, there have been no reported deaths attributed to the disease, and affected cattle generally recover within two to three weeks with proper supportive care.

In response to the outbreak, stringent food safety protocols are in place to safeguard milk and meat products. Pasteurized milk and properly cooked meat remain safe for human consumption, in accordance with federal and state guidelines.

The American Association of Bovine Practitioners (AABP) is actively monitoring the situation and providing reliable information to its members and the public. Continued collaboration and vigilance are essential in managing and mitigating the impact of avian influenza in dairy cattle.

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