Poultry diseases refer to illnesses that affect birds raised for food, such as chickens, turkeys, and ducks. These diseases can be caused by various factors, including viruses, bacteria, parasites, and environmental conditions. Common poultry diseases include avian influenza, Newcastle disease, and salmonellosis, which can lead to significant economic losses in the poultry industry. Preventing poultry diseases involves good management practices, such as maintaining proper hygiene, providing vaccinations, and ensuring adequate nutrition. Regular health monitoring and biosecurity measures are essential to protect flocks from outbreaks and to promote overall bird health.