Fowl cholera disease of poultry is caused by

Fowl cholera disease in poultry is caused by Bacterial disease.
It is an infectious avian disease caused by the bacterium, Pasteurella multocida. It is a Gram-negative, nonmotile, non-spore-forming, rod-shaped bacterium. The species P. multocida includes the subspecies multocida, septica and gallicida.
The most efficient treatment in breeding flocks or laying hens is individual intramuscular injections of a long-acting tetracycline, with the same antibiotic in drinking water.