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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