Fig. 1. H&E in Fatal avian malaria in captive Atlantic puffins (Fratercula arctica) in Switzerland

Fig. 1. H&E-stained histological sections of the liver (A, B, C) and the spleen (D) of captive Atlantic puffins at 400x magnification. A: Case 1, multiple protozoan Plasmodium schizonts of up to 20 μm in diameter (arrows). B: Case 2, periportal infiltration with lymphocytes and presence of multiple intracytoplasmic Plasmodium schizonts, which contain numerous merozoites (arrows). C: Case 3, Plasmodium merozoites within the liver parenchyma (arrow). D: Case 5, multiple histiocytes with intracytoplasmic brown, finely granular pigment (accumulation of iron-based pigment). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)