Influence of Age and Congenital Immunity Upon Immunization with an Avian Infectious Bronchitis Vaccine

L. G. Raggi, George G. Lee

The Journal of Immunology · 1958 · 20 citations · 0 references

Concepts

Abstract

Summary A study of the serological and immune responses of birds of two different ages with or without a high level of congenital antibodies to infectious bronchitis virus (IBV) indicated that both young age and congenital immunity were important factors in preventing a satisfactory response to this vaccinal strain of IBV. Discrepancies between the serological and the response to challenge were noted in the younger groups of birds.