Figure 1From: Comparative studies on the pathogenicity and tissue distribution of three virulence variants of classical swine fever virus, two field isolates and one vaccine strain, with special regard to immunohistochemical investigationsTonsil. Experiment I, PID 8. Positive immunohistochemical staining. Tonsil. Experiment I, PID 8. Superficial-epithelial cells, macrophages and lymphoid cells staining intensely for CSFV antigen in the cytoplasm with a monoclonal antibody specific for glycoprotein E2 (WH 303). Immunohistochemistry; EnVision™ +HP mouse system. Magnification 540×.Back to article page