A fourth Barron County, Wisconsin, H5 avian influenza detection has been confirmed in a commercial turkey flock, the Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) announced on May 3. About 16,000 breeding turkeys and nearly 42,000 hatching eggs are affected in the now eighth avian influenza case in the state of Wisconsin. 

The H5 avian influenza virus was first detected in Wisconsin at a commercial chicken flock in Jefferson County on Monday, April 13. Since then, seven additional flocks were detected in Barron, Juneau, Chippewa and Jefferson counties, bringing the total of birds affected to more than 1.5 million in Wisconsin.

The property in Barron County was immediately quarantined and neighboring properties with poultry will be notified about the situation. Remaining birds will be depopulated and will not enter the food supply. Following U.S. Department of Agriculture (USDA) protocols, surveillance and testing procedures will take place at properties near the affected facility to ensure the virus has not spread.

A ban on poultry movement to shows, exhibitions and swap meets in Barron, Chippewa, Jefferson and Juneau counties in Wisconsin remains in effect through the end of May.

Multiple outbreaks of avian influenza have occurred most recently in Iowa, Minnesota, Missouri, Arkansas, the Dakotas and Kansas leading to the depopulation of more than 8 million turkeys and chickens.

Bird owners should monitor their flock closely and report sick or dead birds to DATCP at +1.800.572.8981.

See WATTAgNet's avian influenza map to keep updated on avian influenza outbreaks in the United States and Canada.