First highly pathogenic avian influenza detection in dairy cows in Nevada

The property has been quarantined and milk supplies remain safe for consumption

SPARKS – The Nevada Department of Agriculture (NDA) has received evidence of a detection of Highly Pathogenic Avian Influenza (H5N1) in dairy cattle in Nye County. The affected premises has been quarantined and mandatory testing will occur onsite at regular intervals until the herd is confirmed to be virus-free. Once the virus is sequenced by USDA Animal and Plant Health Inspection Service (APHIS) National Veterinary Services Laboratories, this would be the first detection in the state.

“Ensuring the safety of the industry is our utmost priority,” said NDA Director J.J. Goicoechea. “Early action is critical to prevent the spread of animal disease. We have notified industry members and encourage increased animal and worker safety precautions.”

The Centers for Disease Control (CDC) maintains that the risk to humans remains low and the NDA is working with state and county health officials to protect human health and safety. 

“The NDA thanks our partners from the Department of Health and Human Services (DHHS) and Nye County Health Officer, Dr. Daniel Griffith, for their support and coordination.” said Goicoechea. “This is a huge team effort, and we are thankful to have strong partners across Nevada.” 

Dairy and meat products remain safe for consumption. In addition, the USDA has determined that pasteurized milk will not transmit the virus to humans. Raw milk is illegal in Nevada.

“As always, we recommend following food safety guidelines, only eating or drinking pasteurized milk and cheeses, and cooking meat to the appropriate minimum internal temperatures,” said Goicoechea.

More information on food safety is available at foodsafety.gov.

H5N1 has now been detected in 16 states throughout the U.S. with detections in dairy cattle beginning in March 2024 in Texas. Since then, detections have been confirmed in Nevada’s neighboring states. Livestock owners are encouraged to practice good biosecurity and monitor animals for signs of illness. H5N1 presents mild symptoms in cows, including reduced milk production, decreased feed consumption or coughing or sneezing. If an animal shows any signs of illness, contact your local veterinarian.Livestock workers should also monitor for symptoms, which may be mild, including fever, eye redness or irritation, or respiratory symptoms. Individuals showing signs of illness should seek medical attention. Personal Protective Equipment (PPE) is available through NDA and can be requested by calling 775-353-3709