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Michigan Lifts Ban on Importation of Wisconsin Hogs

Infection eliminated, neighboring herds confirmed negative.

Michigan has lifted the ban on the importation of Wisconsin hogs. Successful elimination of the pseudorabies virus has been completed in Wisconsin and verified through retesting of neighboring swine herds, according to Michigan Department of Agriculture Acting Director Phyllis Mellon

The ban was instituted on April 19 in response to a notification from the United States Department of Agriculture of a PRV outbreak in a swine herd in Clark County, Wisconsin. A second herd was later identified. This was Wisconsin's first pseudorabies outbreak since 1998.

"We commend Wisconsin's swine industry for quickly addressing this highly contagious viral disease which threatened the state's pork industry," says Mellon. "Michigan's channels of commerce with Wisconsin swine producers are restored with confidence that our pork industry's health and economic viability are protected."

In 2005, Michigan's pork industry generated $230 million, produced more than 470 million pounds of pork, and currently has a total swine population of 960,000.

Pseudorabies is a highly contagious viral disease primarily affecting swine, but other animals such as deer, raccoons, cattle, sheep, goats, dogs, and cats can also be infected. It is not a health threat to humans. PRV is transmitted through nasal and oral secretions, food, water and the environment; and can be carried on car tires, boots and clothing. Additionally, swine may harbor the virus without showing clear signs.

For more information, please visit the MDA Web site at or the USDA Web site at

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