Avian Influenza

In an effort to curb further spread of the HPAI virus and implement additional control measures to protect the dairy and poultry industries and public health in Colorado, the Colorado Department of Agriculture is implementing mandatory statewide surveillance for all Colorado Department of Public Health and Environment (CDPHE) licensed commercial cow dairies. This action will help identify any additional infected dairies with the virus with the goal of preventing further spread of the disease.

The Colorado State Veterinarian’s Office has issued new guidance to minimize influenza transmission at dairy cattle livestock exhibitions.

Yesterday, the Colorado Agricultural Commission approved, and Commissioner of Agriculture Kate Greenberg adopted an emergency rule to help limit the spread of Highly Pathogenic Avian Influenza (HPAI) in Colorado. Since the initial detection of HPAI in dairy cattle in March 2024, the virus has spread to dairies in at least nine states, including Colorado.

Yesterday, the US Department of Agriculture’s (USDA) National Veterinary Services Laboratory (NVSL) confirmed a detection of Highly Pathogenic Avian Influenza (HPAI) H5N1 in dairy cows in Northeast Colorado. This is the first detection of avian influenza diagnosed in cattle in Colorado. Detections of HPAI in dairy cattle have occurred in eight other states.

The US Department of Agriculture’s (USDA) National Veterinary Services Laboratory (NVSL) confirmed a new case of Highly Pathogenic Avian Influenza in a backyard flock in Weld County, Colorado. The flock experienced a high mortality event, losing 20 of 24 chickens in the flock, after exposure to sick and dying wild geese on the premises. The remaining birds in the flock were euthanized.  

Today, Colorado State Veterinarian Dr. Maggie Baldwin released the last premises quarantine in Colorado enacted as a result of the highly pathogenic avian influenza (HPAI) outbreak. With the release of the final HPAI quarantine, Colorado has achieved HPAI-free status as designated by the World Organization for Animal Health (WOAH).

Because Highly Pathogenic Avian Influenza (HPAI) continues to present a threat to birds across Colorado, the Colorado State Veterinarian’s office has issued updated guidance for poultry events, such as swaps, meets, and competitions. The guidance asks poultry owners to increase safety precautions and biosecurity practices, monitor their flocks for illness, and report any sick or dead birds to the State Veterinarian’s Office. 

The threat of Highly Pathogenic Avian Influenza is still fully present across Colorado and the country. With multiple new detections in Colorado over the past week, the Colorado State Veterinarian’s Office is continuing to promote biosecurity practices as the best method to prevent the introduction of the disease fatal to birds and poultry. 

On June 22, 2022, the Colorado Agricultural Commission met to discuss an Emergency Rule on poultry shows that is set to expire on June 30, 2022. The Commission approved the recommendation of the Commissioner of Agriculture and State Veterinarian to let the current rule expire without promulgating a follow-up emergency rule.

Upon guidance from the Colorado State Veterinarian, the Colorado State Fair Board Authority has made the determination to cancel any poultry shows during the 2022 fair. This precautionary measure is being taken as highly pathogenic avian influenza continues to affect domestic poultry across the nation. The Board approved the cancellation during their regular Board meeting on Wednesday, May 25, 2022.