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Protozoan infections are parasitic diseases caused by organisms formerly classified in the Kingdom Protozoa. They include organisms classified in Amoebozoa, Excavata, and Chromalveolata. Examples include ''Entamoeba histolytica'', ''Plasmodium'' (some of which cause malaria), and ''Giardia lamblia''.〔(【引用サイトリンク】title=Intestinal and Luminal Protozoa )〕 ''Trypanosoma brucei'', transmitted by the tsetse fly and the cause of African sleeping sickness, is another example.〔(【引用サイトリンク】title=Sleeping Sickness )〕 The species traditionally collectively termed "protozoa" are not closely related to each other, and have only superficial similarities (eukaryotic, unicellular, motile, though with exceptions.) The terms "protozoa" (and protist) are usually discouraged in the modern biosciences. However, this terminology is still encountered in medicine. This is partially because of the conservative character of medical classification, and partially due to the necessity of making identifications of organisms based upon appearances and not upon DNA. Protozoan infections in animals may be caused by organisms in the sub-class Coccidia (disease: Coccidiosis) and species in the genus Besnoitia (disease: Besnoitiosis). ==Treatment== They are treated with antiprotozoal agents.〔 Recent papers have also proposed the use of viruses to treat infections caused by protozoa. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Protozoan infection」の詳細全文を読む スポンサード リンク
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