Comparative Study of the Immune Response Induced by an Argentinian Classical Strain of IBDV in Two Chicken Breeds

<div>Recovery evaluation of bursal follicles of infected chickens. Bursae collected at 28 dpi were fixed and PAS stained. The number of follicles with and without PAS-positive membranous structures was counted in each sample. Recovery index (RI) was calculated using the following formula: RI = total number of PAS-negative follicles/total number of PAS-positive follicles. Results are presented as the mean of the RI of each group.</div>

Veterinary Medicine International

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Figure 3

Figure 3: Comparative Study of the Immune Response Induced by an Argentinian Classical Strain of IBDV in Two Chicken Breeds 