Improving Broiler Chicks Immunological Efficiency and Performance Following Newcastle Vaccination

Newly hatched flocks number 100 broiler chicks it was used to investigate the effect of some

feed additives on improving immunity of birds to Newcastle disease after vaccination, where it was divided the chicks into four groups of equal number :first group (negative) )G1) was fed on the basic diet without any additives , G2 chicks received 250 mg Vitamin C in their drinking water,G3 chicks were treated 4% Nigella seeds, while G4 treated with cinnamon extract at doses of 4%, The birds received the first and second doses of the New Castle vaccination during the thirty-five-day experiment. After the initial and subsequent immunizations, the hem agglutination inhibitory antibody titers and antibody titers in an ELISA test were measured for these vaccines. The effect of these additions on productive traits, which included body weight, weight gain , and feed consumption, was studied . The results showed a positive effect on poultry health and productive performance and the results showed significant increase in the standard of antibodies to Newcastle antigen in the treatment groups G2,G3,G4 than the control group at the level of probability (P < 0.05). Significant increase level (P < 0.05) inhibitory antibody titers of Newcastle in the treatment and control groups measured by ELISA test for the four groups at a probability level (P < 0.05) after the second vaccination compared to the first vaccination. Significant increase in the standard of volumetric inhibitory antibodies to Newcastle antigen in the group treated with vitamin C compared other two groups G3 ,G4 following first and second vaccinations .The results of the statistical analysis of body weight, weight gain , feed consumption, showed a significant superiority of treated groups comparison to the control group, as well as the significant superiority of vitamin C. treatment group over the two groups treated with Nigella Sativa and cinnamon, respectively.