Immunohistochemistry (IHC) of infected tissues.
Detection of viral antigens in infected tissues by IHC is depicted as red stain. A) shows extensive distribution of viral antigens in exocrine pancreas. B) Viral antigens in liver parenchyma of multifocal appearance. C) Rounding (R) of individual liver cells and also with vacuolation (V) concomitant with positive staining for virus (red). D) Viral positive cells scattered in spleen tissue.