Research Article

A Single Mutation of VP2 is Responsible for the Lethality and Antigenicity Differences between Novel Variant and Very Virulent IBDV Strains

Figure 2

Tissue lesions in major immune organs induced by different mutated IBDVs. (a) Clinical necropsy of the bursa, spleen, and thymus tissues of chickens infected with rHLJ0504, rHLJ-D279N, rSHG-N279D, or rSHG19 at 5 dpi. (b) Bursa/body weight. (c) Spleen/body weight. (d) Thymus/body weight. Error bars represent the standard deviation (SD). ; ; ; .
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