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Lymphoid depletion in wildlife species following canine distemper virus (CDV) infection. a) Severe hypocellularity (asterisk) of the splenic white pulp in a CDV-infected marten; A = central artery; hematoxylin–eosin, magnification × 200; b) Detection of CDV antigen in a splenic follicle of a raccoon by immunohistochemistry; A = central artery; avidin–biotin–peroxidase complex method; hematoxylin counterstain; magnification × 400.
