"Poultry refers to tamed birds that people keep for their eggs, flesh with adhering bones, or feathers. Various kinds of poultry include chicken, turkey, goose, duck, quail, pheasant, pigeon, fowl, ostrich, emu, and rhea. Poultry has a great impact on monetary, nutritional, social and cultural elements in the developing countries. It is particularly significant for the sustenance of necessitous countryside families, who many times possess and deal with chickens and other domesticated birds. In addition to the economic source, poultry gives pleasure to several people, thus making it a big and favorable recreation. Alas, poultry has some limitations. It may become unwell, thereby impeding poultry production. Poultry gets affected by four main types of diseases: metabolic and nutritional diseases, infectious diseases, parasitic diseases, and behavioral diseases. This book details diseases altering poultry, and some factors contributing to the disease."