Efficacy of H120 and Ma5 avian infectious bronchitis vaccines in early challenge against QX strain.

ABSTRACT: Infectious bronchitis (IB) is a highly infectious avian pathogen, which affects the respiratory tract, gut, reproductive system, and kidney of chicks of all ages. Many different serotypes of IB virus (IBV) are recognized which cause different clinical manifestations. According to the antigenic differences, different serotypes of the virus do not cross-protect. Massachusetts serotype induces the best cross-protection against other serotypes. Recently, the IBV QX strain has been detected in Iran. QX strain causes permanent damage to the oviduct if it occurs in the early life cycle and is a significant factor in layer and breeder chicken flocks. In this study, we compare the H120 and Ma5 vaccines' protection against early challenge with the QX strain in commercial chicks. one-day-old commerci

SUBMITTER: Karimi V 

PROVIDER: S-EPMC5877842 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature