Diseases caused by protozoans. These organisms may remain in the human host for their entire life cycle, but many carry out part of their reproductive cycle in insects or other hosts. For example, mosquitoes are vectors of plasmodium, the cause of malaria. See also entamoeba; Giardia lamblia; sleeping sickness.
This entry comes from Encyclopædia Britannica Concise.For the full entry on protozoal diseases, visit Britannica.com.
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