Malaria parasites. Coloured transmission electron micrograph (TEM) of red blood cells infected with malaria parasites (Plasmodium sp.). After sporozoites are injected into the body by a mosquito, a life stage known as a trophozoite develops. These inhabit red blood cells (erythrocytes) and digest the cells' haemoglobin, causing anaemia in the host. They then replicate, releasing merozoites that invade other red blood cells. This periodic release of merozoites causes severe cyclic fevers. Magnification unknown.
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