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الملخص
The research was objected to evaluation of the Humoral Immune Response to infectious bronchitis vaccine (strain H120) In broiler chickens.
Four groups of one day old broiler chickens of each group was included 100 birds.
First group (control ) was unvaccinated, second group was vaccinated at 1-day-old by spray, third group was vaccinated at 1-day-old with eye-drop, fourth group was vaccinated of 1-day-old with drinking water.
The Elisa test was used to measure antibody titres of infectious bronchitis virus in sera birds at 21 and 28 day-old.
The results were showed that antibody titres was high in second vaccinated in 1-day-old by spray as compared with third and fourth groups at 21 and 28 day, and it was nonsignificance differences between second and third groups (P > 0.05 ) and it was nonsignificance differences in antibody level at 21 and 28 day betwen second and fourth (P > 0.05 )
The study showed that second group vaccined with H120 vaccine at 1-day-old by spray vaccination was give high antibody titres as compared with other groups.