Fig. 4. The macroscopic lesions in the unvaccinated and vaccinated chickens after challenge with the variant II IBV strain. (A) Normal kidney tissue from an unvaccinated/unchallenged chicken, (B) Normal kidney tissue from a vaccinated/ unchallenged chicken, (C) Nephritis and nephrosis in the kidney and fluid accumulation in vestigial right oviduct (arrow) in unvaccinated/challenged chicken, and (D) Nephritis and nephrosis in the kidney with fluid accumulation in vestigial right oviduct (arrow) in vaccinated/challenged chicken.
