Coryza impacts NW Ohio

There are reports of cases of coryza affecting both small farms and large complexes in Darke and Mercer Counties and westward into adjacent border counties in Indiana. As many as 10 million hens may be at risk in the region. Infected flocks may show a drop in production of up to 30 percent and mortality of 15 percent over two weeks. Depending on the extent of spread, egg production will be depressed with obvious market implications.