Page:Tropical Diseases.djvu/1001

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PLASMODIUM
943

Fig. 247.—Plasmodium vivax: schema of entire life-cycle.

duce a pigment called "melanin." The invertebrate host is generally a mosquito. Such are the parasites of human malaria—the benign tertian Plasmodium vivax (Fig. 247), the benign quartan Plasmodium malariæ, and the pernicious or