The ability to resist Newcastle disease through inherited immunity in different strains of broilers in Nineveh governorate

Abstract

Background: Newcastle disease (ND) is a viral disease that affects numerous bird species and is still present in many places, including Iraq. Aim: The purpose of this study was to compare maternal derived antibodies (MatAb) against ND vaccination in one-day-old imported Cobb 500 and Ross 308 chicks. Methods: From April to October 2020, four locations in Mosul governorate chosen to compute the maternal derived antibodies (MatAb) from one-day old broiler chicks. Seven hundred and seven blood samples (451) from imported 28 Ross 308 flocks and 256 from 17 Cobb 500 flocks were obtained and tested for antibody levels using an indirect ELISA (iELISA) assay (Biochek commercial kit, UK). Results: The Cobb 500 broiler chicks outperformed the Ross 308 broiler chicks in that all of the Cobb 500 broiler chicks had maternal antibody (Mat Ab) titers (100% positivity) versus 97.78% of the Ross 308 chicks, had a mean (Mat Ab) titer of 9871.47 versus 8647.76, and had a mean CV percentage of 12.41% versus15.18% respectively. The mean Vaccination index of Cobb 500 broiler chicks was 966.59 versus 821.60 for Ross 308 broiler chicks. Conclusion: Although both broiler types produced chicks with high and uniform maternal antibody titers, Cobb 500 produced chicks with higher protective titers than Ross 308.

Evaluation of the immune response of layer chickens to Newcastle disease virus vaccines using the new vaccination regimens

“…(2021), who reported that MDA persisted for up to 28 days, and Ezzulddin et al. (2022), Kapczynski et al. (2013) and Oberlander et al.…”

“…Cvetic et al (2021), who reported that MDA persisted for up to 28 days, andEzzulddin et al (2022),Kapczynski et al (2013) andOberlander et al (2020), who also observed that MDA persisted up to 27 days of age. Antibodies in chicks endured for 31 days post-birth, inherited from parent stock, with peak titres observed during the layer stage.…”

The Effect of High Stocking Density and Dietary Protein Levels on Blood Profiles, Intestinal Bacteria, Some Immunological Parameters, Status Antioxidant, and Performance in Native Chickens

“…A decrease in antibodies during heat stress causes an increase in NDV, infectious bursal disease virus (IBDV), and infectious bronchitis disease virus (IBV) (Vandana et al, 2021). According to Ezzulddin et al (2022), antibody values can be influenced by intrinsic and extrinsic factors, including environmental factors, chicken-rearing management factors (vaccine programs), and chicken genetics factors that significantly affect the immune system. In this study, different crude protein levels significantly influence NDV titres.…”