Fowl Pox Fowl pox is caused by a pox virus. Avian Encephalomyelitis Avian encephalomyelitis (AE) is caused by an enterovirus belonging to the picornavirus group. Infectious Bursal Disease The disease is caused by a birna virus of serotype 1. Reovirus Infections Reovirus infections, also know as viral arthritis/tenosynovitis is caused by an avian reovirus. Malabsorption Syndrome This complex disease has been reported under various na such as helicopter disease, femoral head necrosis, brittle bone disease. Infectious Anaemia A marked difference in size and growth retardation is observed between healthy (left) and infected (right) birds. Infectious Synovitis This disease is caused by Mycoplasma synoviae (Ms). Fowl Cholera Fowl cholera is caused by a bacterium: Pasteurella multocida (several serotypes). Pulloruin Disease and Fowl Typhoid Pullorum disease is caused by a bacterium, Salmonella pullorum. Ornithobacterium Ornithobacterium rhinotracheale is a gram-negative rod responsible for causing infections in chickens and turkeys of all ages.