Colorado Enforces Mandatory Bird Flu Testing for Dairy Milk
Colorado has introduced a new mandate requiring dairies to test milk for bird flu, specifically the highly pathogenic avian influenza (HPAI) H5N1 strain. This move comes as a precautionary measure following the detection of the virus in dairy cows within the state.
Background
The USDA’s National Veterinary Services Laboratories (NVSL) confirmed the presence of HPAI H5N1 in dairy cattle in Colorado on April 25, 2024. This discovery marks a significant development as HPAI has predominantly affected poultry but now poses a threat to dairy cattle as well.
Public Health and Milk Safety
Despite the detection of HPAI in dairy cattle, health authorities, including the USDA and FDA, have assured the public that the risk to the commercial milk supply remains low. Pasteurization, a process required for all commercial milk, effectively inactivates bacteria and viruses, including HPAI.
New Regulations
To manage and mitigate the spread of the virus, Colorado has mandated weekly testing of bulk-tank milk samples from all CDPHE-licensed dairy farms. This testing protocol aims to ensure that any potential contamination is identified and addressed promptly.
Biosecurity Measures
The USDA and other agencies emphasize the importance of biosecurity practices to prevent the spread of HPAI. Recommendations include:
- Monitoring for Sick Animals: Regularly check cattle for symptoms of HPAI, such as low appetite and decreased milk production.
- Limiting Movement: Restrict the movement of cattle and ensure pre-movement testing for interstate transport.
- Enhanced Hygiene: Implement strict hygiene protocols for vehicles, equipment, and personnel to prevent contamination.
- Wildlife Management: Report unusual behaviors or die-offs in wild and domestic birds to appropriate authorities.
Impact on Dairy Farmers
Dairy farmers affected by HPAI can receive support from the USDA, which includes biosecurity planning, provision of personal protective equipment (PPE), and financial assistance for veterinarian costs and sample shipping.
The detection of HPAI in dairy cattle has prompted Colorado to enforce stringent testing and biosecurity measures. While the risk to the public remains low, these steps are crucial to safeguarding both public health and the dairy industry.
