Photomicrographs of Geimsa stained blood smears from: An uninfected mouse (1A, B), a CS infected mouse (1C, D), a CR infected (1E, F), and a CR infected chloroquine treated mouse (1G, H). Fig. 1B, D, F and H are photomicrographs of the same fields taken under polarizing light. Birefringent crystals appear as intracellular points of light. The arrows in F and H indicate a single visible hemozoin crystal. Total magnification = 1000x.