Avian Coryza is an emerging poultry respiratory disease in some regions of the United States. Severe facial edema is probably the most notorious clinical sign which couples with a sharp decrease in egg production in laying hens. Read more here >>> For Pennsylvania Department of Ag flock recommendation letter: Flock recommendation letter 4-4-19 Final For Pennsylvania Department of Ag biosecurity principles: StandardE-BiosecurityPrinciples 2019
