Avibacterium paragallinarum

Avibacterium paragallinarum, formally known as Haemophilus paragallinarum, is a gram-negative bacterium and causative agent of Infectious Coryza (IC). IC is a contagious upper respiratory tract disease of chickens. A. paragallinarum is usually transmitted through drinking water contaminated with infective nasal exudates. Infection may also occur by contact and by air-borne infected dust and/or droplets.