Avian Influenza Cases Rise Across Michigan as Biosecurity Efforts Continue

By Andi Anderson

New detections of highly pathogenic avian influenza (HPAI) have been confirmed in several Michigan counties, according to the Michigan Department of Agriculture and Rural Development (MDARD).

The Michigan State University Veterinary Diagnostic Laboratory identified the virus in three commercial flocks in Ottawa County, one backyard flock in Monroe County, and another backyard flock in St. Clair County.

These detections continue a trend of cases first identified in Michigan in 2022. For 2025 alone, there have been ten cases in Ottawa County, four in Monroe County, and one in St. Clair County.

HPAI is a fast-spreading virus that can move from flock to flock through wild birds, infected animals, shared equipment, or contaminated clothing and shoes. Because of this, farmers of all sizes are urged to maintain strong biosecurity and consistently use personal protective equipment.

These efforts help protect domestic birds and safeguard public health. According to the U.S. Centers for Disease Control and Prevention, the public health risk remains low, but safe handling and cooking of poultry and eggs are still important.

Farmers and backyard bird owners can reduce risks by keeping domestic birds away from wild birds, washing hands before and after handling birds, disinfecting boots and equipment, avoiding shared tools, using clean drinking water, and securing poultry feed from wildlife. Cleaning and disinfecting supplies between uses are also essential steps.

MDARD continues to work with local, state, and federal agencies to respond quickly to potential cases and provide guidance to bird owners.

Domestic bird owners should watch for signs such as multiple sudden deaths, reduced egg production, less water intake, diarrhea, or coughing. Suspected cases should be reported to MDARD immediately at 800-292-3939 during the day or 517-373-0440 after hours.

Unusual deaths among wild birds should be reported to the Michigan Department of Natural Resources using the “Eyes in the Field” app or by calling the DNR Wildlife Disease Laboratory at 517-336-5030.

To stay informed, residents can subscribe to updates through MDARD’s Media Room website and access more resources at Michigan.gov/BirdFlu or the USDA website. Information on personal protective equipment is also available through the Michigan Department of Health and Human Services.

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