Michigan Detects Chronic Wasting Disease in Farmed Deer

By Andi Anderson

The Michigan Department of Agriculture and Rural Development (MDARD) has confirmed cases of chronic wasting disease (CWD) in farmed white-tailed deer located in three different counties. The detections were made in Calhoun, Kent, and Mackinac counties, raising concerns about the continued spread of the disease among farmed cervid populations.

According to state officials, an infected two-and-a-half-year-old deer was identified in Calhoun County, while a four-year-old infected deer was detected in Kent County. A third infected deer, three years old, was discovered in Mackinac County during trace investigations connected to the Calhoun County herd.

The first two cases were identified through Michigan’s routine CWD surveillance program for farmed deer. The third case was found through follow-up investigations designed to track potential disease exposure and movement between herds.

State Veterinarian Dr. Nora Wineland, DVM, MS, DACVPM, emphasized the importance of monitoring programs in detecting the disease at an early stage.

"These detections highlight why it is so vital to perform regular surveillance testing. Early detection allows for a prompt response, which helps limit the exposure of additional animals to this disease," said State Veterinarian Dr. Nora Wineland, DVM, MS, DACVPM. "While regular CWD surveillance testing is central to response efforts, MDARD's ongoing partnership with herd owners, hunters, and other state and federal partners is crucial to effectively managing this disease. Ensuring the health of Michigan's farmed cervid population has been and continues to be a team effort."

Chronic wasting disease is a progressive and fatal neurological disease that affects members of the deer family, including white-tailed deer, mule deer, elk, and moose. The disease can spread through direct animal-to-animal contact or through contaminated environments. Infected animals may appear healthy for long periods before developing symptoms such as abnormal behavior, weight loss, and physical decline.

Michigan has previously reported cases of CWD in farmed deer facilities across several counties, including Kent, Lake, Mecosta, Montcalm, Newaygo, and Osceola. The latest detections demonstrate the continued need for disease monitoring and biosecurity efforts.

State officials are conducting ongoing investigations to determine whether other farmed cervids may have been exposed. These efforts are aimed at limiting disease transmission and protecting animal health.

Currently, there have been no reported human cases of chronic wasting disease. However, health organizations, including the World Health Organization and the U.S. Centers for Disease Control and Prevention, recommend that animals infected with CWD should not be consumed by humans or domestic animals.

The recent cases highlight the value of surveillance programs, industry cooperation, and rapid response measures in managing chronic wasting disease and safeguarding Michigan’s farmed deer population.

Photo Credit: gettyimages-alexeyrumyantsev