Newcastle Disease (ND) is characterized by sneezing, couhing, and neurologic sign. Mortality rate is especially very high in the young age group (about 90%). Affected layer has poor egg quality and reduced egg production in initial phase but usually return to normal levles within four to eight weeks. ND can cause sudden deat even in vaccinated poultry and spread rapidly to nearby flocks. Diagnosis is usually made by virus isolation, serology and clinical signs. It has been reported that hemagglutination inhibition (HI) test which is used widely in ND virus serology has cross reactions with other paramyxoviruses. The Rapid NDV Ag test kit is highly specific to NDV.