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Agent of acute coryza
What is the causative agent of acute coryza?
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2 Replies
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The causative agent of acute coryza in poultry is Avibacterium paragallinarum, a gram-negative bacterium.
It primarily affects chickens, causing an upper respiratory disease characterized by:
Nasal discharge, Facial swelling (especially around the eyes), Sneezing, Decreased feed and water intake, Drop in egg production.
Transmission: Direct bird-to-bird contact, Airborne droplets, Contaminated feed, water, equipment, or clothing.
Risk factors: Poor ventilation, Stress (e.g., due to overcrowding or sudden weather changes), Mixed-age flocks (younger birds are more susceptible).
Control and prevention:
Vaccination (especially in areas with a history of the disease), strict biosecurity, antibiotic treatment – may reduce symptoms but won’t eliminate the bacteria entirely (veterinary supervision).
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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.
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