Al-sultan, Abdulrahman Abdulhadi2022-05-182022-05-1820011706https://drepo.sdl.edu.sa/handle/20.500.14154/4019Products of poultry for man are rich sources of animal protein and other important nutrients. Poultry industry in the kingdom of saudi arabia is a successful expanding business. Disease affect productivity and lead to great economic loss.enThesis