In ovo administration of the Marek's disease vaccine in conjunction with 25-hydroxyvitamin D₃ and its subsequent effects on the performance and immunity-related characteristics of Ross 708 broiler hatchlings^1,2,3.

ABSTRACT: The combined effects of the in ovo injection of commercial Marek's disease vaccine (MDV) and various levels of 25-hydroxyvitamin D₃ (25OHD₃) on the hatch variables, immunological measurements, and gene expression of Ross 708 hatchling broilers were investigated. A total of 5 in ovo injection treatments that were applied at 18 d of incubation (doi) included: 1) noninjected (control); or a 50 μL solution volume of 2) MDV alone; or MDV combined with 3) 0.6 μg of 25OHD₃; 4) 1.2 μg of 25OHD₃; or 5) 2.4 μg of 25OHD₃. At hatch, hatchability of set and live embryonated eggs, hatchling body weight, hatch residue analysis, serum IgY and alpha-1 acid glycoprotein (AGP) concentrations, and the expression of genes related to immunity (INFα, INFβ, I

SUBMITTER: Fatemi SA 

PROVIDER: S-EPMC10665917 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature