Evaluation of Emergency Vaccination In Case of Outbreaks of Newcastle Disease

Seriological survay on 1102 serum samples collecte.dfrom chicken flocks were tested for detection ofantibodies against viral respiratory diseases uSlnghe.agp.agglutination inhibition and agar g:el-precipit- ation testeso-Paramyxovirus -2 , -3 , -4 , -6 ”~_ -7 HI-antibodies ,were detected for the first time in Egypt with incidenceof 24.3 J 74.9 , 18.9 , 9.3 and 15.1 per cent,respectively. -PrecipitRting antibodies against Newcastle disease,Infectious Bronchitis,CELO-virus and Infectious Lary- ngotracheitis were detected in rates of 24.5 , 25.9 ,19.8 and 14.3 ) and the infection in incidence of 24.5 , 19.8 ,1~.8 and 1106 per cent, respectively.~ewcastle disease was not reported as a sole infection in the examined chicken flocks. 2.The value of Newcastle disease emErgency vaccinationusing different routes , vaccines and at different intervals from infection was studied.