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Viral loads in tear and oral swabs. IBV RNA levels in tear and oral swabs were evaluated at 2, 4, 6, 8, 10, 12 and 14 dpc. (A) Viral loads in tear swabs. (B) Viral loads in oral swabs. Letters (a,b) indicate significant differences among vaccinated groups (p < 0.05). ** and * indicate p < 0.01 and p < 0.05 between vaccinated and nonvaccinated groups, respectively. (n = 10 chickens/group.)
