Epidemiological and experimental evidence for immunodeficiency affecting avian infectious bronchitis.

@article{Toro2006EpidemiologicalAE,
  title={Epidemiological and experimental evidence for immunodeficiency affecting avian infectious bronchitis.},
  author={H. H. Toro and Vicky L. van Santen and Lin-Feng Li and Susan B Lockaby and Edzard van Santen and Frederic J Hoerr},
  journal={Avian pathology : journal of the W.V.P.A},
  year={2006},
  volume={35 6},
  pages={455-64}
}
We evaluated the effects of viral immunodeficiency on the outcome of infectious bronchitis virus (IBV) infection in chickens as a hypothetical cause for failure of adequate protection in vaccinated chickens. Initially, we investigated IBV isolations from cases of respiratory disease in association with the presence of thymic and/or bursal atrophy in 322 submissions during 1997 to 2002. Arkansas (Ark)-type IBV was most frequently isolated in spite of extensive ArkDPI vaccination in the broiler… CONTINUE READING

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