One of the fastest-growing meat supply and largest animal population in the world is the poultry industry. and considered the common demand of proteins and important source of income.
Protecting bird flocks against pathogenic microorganisms is an important part of commercial poultry production. Bacterial diseases of poultry cause important losses to the poultry industry worldwide every year. Therefore this study is intended to gathering information about these infectious diseases with focusing on the preventive measures to minimize the risk of infection and its economic losses