Infectious coryza is a well-recognized and commonly encountered upper respiratory tract disease of chickens that is caused by the bacterium Haemophilus paragallinarum. The occurrence of recent outbreaks in North America has emphasized that the disease can be significant in meat chickens as well as layer chickens.

Is coryza the flu?

see also: viruses. influenza.

Where does coryza come from?

Infectious coryza, which is also referred to as a cold or roup, is caused by the bacterium Haemophilus paragallinarum. This disease primarily affects chickens, but quail and pheasants may also be affected. Coryza is primarily transmitted by direct bird-to-bird contact.