描述

Newcastle disease, infectious bronchitis, and Egg Drop Syndrome are highly contagious viral diseases that significantly affect poultry health and productivity. Newcastle disease impacts the respiratory, nervous, and digestive systems and can cause high mortality, while infectious bronchitis primarily affects the respiratory tract and reduces egg quality and production. Egg Drop Syndrome mainly affects laying hens, leading to a sudden drop in egg production and poor shell quality without severe illness. All three diseases spread through contact or contaminated materials, and effective control relies on vaccination and strict biosecurity measures.