Infectious Fowl Coryza

Infectious fowl coryza is an acute respiratory worldwide chicken disease. Which is also referred to as a cold or roup. It is caused by the bacterium Haemophilus paragallinarum. This disease primarily affects chickens, but quail and pheasants may also be affected.

Ways of Transmission

Chickens of all ages are susceptible, but susceptibility increases with age. The incubation period is 1 to 3 days, and the disease duration is usually 2 to 3 weeks.

1.    Direct bird-to-bird contact

2.    Consuming contaminated feed and/or water

3.    Breathing airborne bacteria.

Infected flocks are a constant threat to uninfected flocks.

Signs of Fowl Coryza

Signs of coryza include the following:

1.    Swelling around the face

2.    Foul-smelling

3.    Thick and sticky discharge from the nostrils and eyes

4.    Laboured breathing

5.    The eyelids of an infected bird can become irritated and might stick together.

6.    Diarrhoea may occur.

7.    Growing birds may become stunted.

8.    Infection can cause decrease in egg production and increase the incidence or severity of secondary infections.

Prevention/Treatment

1.    Prevention is the only sound method of control.

2.    Good management, rigorous sanitation.

3.    Practicing "all in/all out."

4.    Because coryza is caused by bacteria, antibiotics can be used to treat the disease. Although antibiotics can be effective in reducing clinical signs of the disease, they do not eliminate the bacteria from carriers.

5.    Administration of Coryl Sp.

6.    Vaccination; multiple vaccinations are required to be effective.

7.    Proper practicing of farm biosecurity.

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