机译:COMPARATIVE STUDY OF DIFFERENT VACCINATION ROUTES AGAINST NEWCASTLE DISEASE IN LAYER CHICKENS
Agric.Microbiology Dept.,Fac.of Agric.,Ain Shams Univ;
Botany Dept.,Fac. of Science,Benha Univ;
Basic and Applied Agric. Sciences Dept.,Higher Institute for Agric. Co-Operation;
Vaccination routes; ND; layer chickens; antibody titer; ELISA; HI test;