Michigan is facing an increased threat from Highly Pathogenic Avian Influenza (HPAI) according to an announcement from the state’s Department of Agriculture and Rural Development. The director, Tim Boring, shared this sobering update, revealing three additional dairy herds infected with this dangerous virus, raising the total impacted counties to four. It was only on March 29 that the state’s first HPAI-positive dairy herd was confirmed in Montcalm County.
This concerning development was confirmed by the U.S. Department of Agriculture‘s National Veterinary Services Laboratory on the evening of April 11. Despite the understandable concern this may cause, it’s important for Michigan residents to know that the commercial milk supply remains safe.
The safety of commercial milk has not been compromised, thanks to federal animal health requirements including necessary pasteurization. Federal experts maintain this step effectively ensures the safety of our milk, with no increased risk posed directly to public health. An encouraging result from analyses of the detected virus indicates no alarming adaptation that makes it more transmissible between mammals, keeping the public health risk associated with HPAI low.
In Michigan, pasteurization of milk sold in stores is a requirement by state law; a process continually proven to disarm bacteria and viruses present in milk, including influenza. This precaution further reinforces the safety of milk for consumers.
State Veterinarian Dr. Nora Wineland underscores the importance of collaboration with veterinarians for a successful recovery of affected dairy cows and urges a limitation on farm visitors. Dairies are also greatly advised to step up biosecurity measures, such as:
- Limiting farm access to employees and essential personnel
- Adhering to best management practices
- Frequent hand washing
Additional measures can be found through Secure Milk Supply. HPAI is known for its high contagiousness among birds and poultry, it can be spread directly from infected wild creatures or indirectly through exposed items like equipment, feed, or even the clothing and shoes of caretakers. If you are a producer with concerns for your animals’ health, or in need of advice on safeguarding their health, contact your veterinarian as soon as possible.
