A chronic infectious disease of chickens caused by a bacterium. Characterised by inflammation of the face and wattles.
Can infect all birds and mature chickens are more susceptible. Transmission is from bird to bird (from infected or carrier to susceptible bird).
Also contracted from infected premises; in some cases following an outbreak of fowl cholera.
The infection usually enters the birds tissues through mucous membranes of the pharynx or upper respiratory tract, but may also enter via conjunctive and superficial wounds.
Domestic cats, raccoons, and other small animals harbor pasteruella in their mouths and introduce infection t domestic poultry. Chronic pasteurellosis follows outbreaks of fowl cholera.
Clinical signs are only few birds in the flock getting affects, it spread slowly . Low mortality and slight decrease in egg production. Affected birds have swelling of the face or wattles and nasal discharge. Labored breathing and occasionally, a bird will exhibit incoordinaton if infection becomes localized in the middle ear.
Treatment is sulfadimethoxine (SDM) but other sulfas are also effective. Short-term treatments do not prevent relapses; long term water treatments can cause drug toxicity. Feed treatment is safer and more effective. Sulfamerazine, sulfamethazine, and sulfaquinoxaline are effective.