40X     |     Hematoxylin and Eosin
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Enlarged macrophages in larger vessels and septal capillaries are distended up to 40 microns by intracytoplasmic, developing schizonts containing many, 1-3 um, basophilic merozoites. There is multifocal, mild, expansion of the tunica media and adventitia by edema and small amounts of fibrin. There is prominent perivascular edema with small amounts of hemorrhage.

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Enlarged macrophages in vessels and septal capillaries (black arrows) are distended up to 40 microns by intracytoplasmic, developing schizonts containing many, 1-3 um, basophilic merozoites (blue arrow). There is multifocal, mild, expansion of the tunica media and adventitia by edema and small amounts of fibrin. There is prominent perivascular edema with small amounts of hemorrhage.