Comparative response to maternal vaccination, in ovo vaccination and post hatch vaccination on the neonatal immunocompetent traits of turkey poults

unknown. An experiment was designed involving maternal vaccination (MV or no MV), in ovo vaccination (IV or no IV) andconventional vaccination (CV or no CV). 7 days post ND (Newcastle disease) vaccination, 460 fertile eggs were collectedand on 25th embryonic day (ED), 230 eggs were in ovo vaccinated with formaldehyde inactivated ND F1 vaccine. Afterhatch, half of the turkey chicks from respective group were conventionally vaccinated and reared. The group havingmaternal vaccination and in ovo vaccination had higher hatchability. Haemagglutination inhibition (HI) titer (log2)against ND vaccination was significantly higher in poults hatched from maternally vaccinated hens than the un-vaccinatedones up to 28 days of age. The poults with in ovo vaccination, had higher titer than un-in ovo vaccinated poults till 49days of age. Combination of maternal vaccination and in ovo vaccination had higher titre value than that in ovo vaccinatedgroup till 21 days of age. Thereafter only in ovo vaccinated groups had higher titre than either maternal or combinationof both. However, they had significantly higher titer values than unvaccinated poults. In ovo vaccination also hadapparently higher titer values than conventional vaccination till 28 days of age. In ovo vaccination and conventionalvaccination did not show any beneficial effect on HI titer. Only maternal vaccination maintained higher titer value thanconventional vaccination up to 21 days of age. Thereafter, conventional vaccinated group had higher titer value.Combination of maternal vaccination and conventional vaccination did not elicit better immune response than eithermaternal or conventional vaccination. Hence, it may be concluded that in ovo vaccination did not affect the hatchabilityand combination of maternal and in ovo vaccination may elicit better antibody titer against ND vaccination in theprogeny.