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Avian infectious bronchitis: cross‐protection studies using different Australian subtypes
Author(s) -
ENDOMUNOZ LB.,
FARAGHER JT.
Publication year - 1989
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.1989.tb09728.x
Subject(s) - infectious bronchitis virus , vaccination , virology , immunity , avian infectious bronchitis virus , antibody , bronchitis , biology , humoral immunity , avian infectious bronchitis , virus , immunology , medicine , immune system , covid-19 , infectious disease (medical specialty) , ecology , disease
The cross‐immunity of vaccinated chickens after challenge with some Australian infectious bronchitis viruses was assessed by humoral antibody responses and by ciliary activity in tracheal rings of vaccinated chickens following challenge. Four viruses were used for vaccination: Vac 3, Vac 4, both current infectious bronchitis vaccine viruses, and Q1/76 and N2/62. IBV N1/62 (synonym T0 and infectious bronchitis virus N9/74 (synonym Appin) were used to challenge the vaccinated chickens. Results showed a lack of correlation between humoral antibody levels and protection. Cross‐immunity was found after vaccination with each subtype, but was lower for Vac 3 and Vac 4 than for Q1/76 and N2/62.