Chicken Respiratory Diseases

Infectious or Avian Coryza is a respiratory infection caused mainly by the bacterium Haemophilus paragallinarum but sometimes, to a lesser extent, others. This disease affects fowl worldwide, though it most often appears in the southwest United States and in the State of California. Chickens and wild birds both can get this disease which will frequently look like other diseases (such as the more serious Newcastle disease). Avian Coryza will frequently manifest itself in combination with other more chronic respiratory diseases.

Birds will become visibly sick 1-10days after exposure. This is a highly contagious poultry disease which is spread through: bird to bird contact, respiratory secretions, feed and water which is contaminated with feces, and contact with dead birds. Be aware that chickens recently added to your flock may be asymptomatic carriers of Avian Coryza.

Symptoms of Avian Coryza include:

1). Birds with distressed noisy breathing.

2). Clear nasal discharge which progresses to white and yellow, which becomes foul smelling.

3). Sick birds will often frequently shake their heads and bizarrely stretch their heads out.

4). Their may also be some discharge seen around the eyes.

5). Head swelling may also be seen.

6). The hens will also stop laying.

Though highly contagious, Avian Coryza is rarely fatal. However, very virulent strains of this disease do occur and they have a much higher mortality rate. Of course the symptoms for these strains would be much worse and would include:

1). Green diarrhea.

2). Darkened head and comb.

3). Swollen wattles.

4). Swollen feet.

5). Paralysis.

6). Listlessness.

Infectious Coryza may have some severe cases which may require antibiotic treatment. Avoiding dirty, contaminated living conditions as well as providing plenty of fresh water for your birds are the best treatment. Please remember that chickens which do not even appear sick may still be carriers so think twice before you start introducing outside birds into your flock... http://tinyurl.com/q2pmnl