Development of egg yolk-based polyclonal antibodies and immunoprophylactic potential of antigen-antibody complex against infectious bursal disease

Autor: Sanaullah Sajid, Sajjad ur Rahman, Mashkoor Mohin, Zia ud Din Sindhu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Veterinary and Animal Science, Vol 23, Iss , Pp 100326- (2024)
Druh dokumentu: article
ISSN: 2451-943X
DOI: 10.1016/j.vas.2023.100326
Popis: A study conducted in the Faisalabad district sampled 50 cases across five IBD outbreaks, revealing an alarming 80 % infection rate among poultry. Our research focused on developing an immune complex (Antigen-antibody complex) with potential immunoprophylactic benefits to counter this formidable threat. Our study was based on producing egg yolk-derived polyclonal antibodies (IgY) targeting IBDV. Commercial layer birds were immunized with inactivated IBDV, yielding IgY antibodies extracted from their eggs exhibited substantially higher and more enduring antibody titers, with a geometric mean titer of 104. Further research involved the creation of an immune complex (ICx) where antigen was extracted from infected bursae tissues. The immunogenic response of ICx was assessed in poultry birds after a challenge with a virulent strain of IBD virus and compared to a conventional IBDV vaccine in poultry. Results revealed significantly higher and more enduring antibody titers induced by the ICx, offering enhanced protective immunity against the IBDV challenge, as evidenced by lower Bursa to bodyweight ratios in vaccinated birds.
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