Newcastle disease attacks poultry. It is a highly contagious viral disease that affects domestic and wild birds, including chickens, turkeys, and pigeons. The virus is spread through contact with infected birds, their droppings, or contaminated equipment, and can cause respiratory, nervous, and digestive symptoms in infected birds. Newcastle disease can have a significant impact on poultry production, as infected birds may die or require culling to prevent the spread of the disease. While other animals may be susceptible to other diseases, Newcastle disease specifically affects poultry.