Occurrence: Worldwide.
Species of bird: Chickens, turkeys
Age of bird: All.
Causes: Mycoplasma synoviae. Spread through the egg and laterally by aerosol. Mechanical transmission occurs via people equipment, vehicles etc.
Effects: Signs include breast blisters, pale or shrunken combs, lameness, ruffled feathers, greenish droppings with large amounts of urates. Birds sit on hocks, are dehydrated, listless, have hot swollen hock and wing joints and foot pads. Layers may have lowered egg production and shell quality.
Mycoplasma infectious synovitis
Chickens and turkeys of all ages are susceptible to this acute to chronic disease. The aetiology
agent involved is M. synoviae.