Birds whose resistance has been weakened through any condition or disease should not be vaccinated until they are healthy. Simple coryza, the common cold, is usually caused by improper management in which birds are subjected to undue exposure. Infectious coryza is caused by a specific microorganism and its severity is increased in birds subjected to resistance lowering factors. Respiratory distress accompanied by watery and swollen eyes and unthrifty condition. Simple coryza responds to correction of undue exposure.
Antibiotics are beneficial.
Infectious coryza sometimes responds to erthyromycin, streptomycin and sulfonamides if treated early. Consider vaccination if exposure risk is high. A disease affecting chickens clinically under 6 weeks of age. Incoordination of gait, staggering, falling to one side, occasional tremors of the head. Excitement intensifies symptoms.