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==Definition==
Protozoa is motile<br>unicellular and eukaryote.
{|class="wikitable" style="width:800px"
|-
!
!style="width:30%"|feature
!style="width:20%"|intestine<br> (cyst or oocyst)
!style="width:20%"|blood, RBC
!style="width:20%"|tissue
|-
!Amoeba<br>アメーバ
|
*amoeboid motility
*asexual reproduction (binary fission)
*infected by cyst
|
*[[Amoebiasis|''Entamoeba histolytica'']]
|
|
*[[Amoebiasis|Free living amoeba]]
|-
!Flagellata<br>鞭毛虫
|
*flagellar motility
*asexual reproduction (binary fission)
*infected by cyst
|
*[[Giardiasis|''Giardia intestinalis'']]
|
*[[African trypanosomiasis|''Trypanosoma brucei gambiense'']]
*[[African trypanosomiasis|''Trypanosoma brucei rhodesiense'']]
|
*[[Chagas disease|''Trypanosoma cruzi'']]
*[[Leishmaniasis|''Leishmania'' spp.]]
*[[Trichomoniasis|''Trichomonas vaginalis'']]
|-
!Apicomplexa<br>アピコンプレクサ門
|
*gliding motility
*asexual and sexual reproduction
*infected by oocyst
|
*[[Cryptosporidiosis|''Cryptosporidium'' spp.]]
*''Isospora belli''
*[[Cyclosporiasis|''Cyclospora cayetanensis'']]
|
*[[Malaria|''Plasmodium'' spp.]]
|
*[[Toxoplasmosis|''Toxoplasma gondii'']]
|}
*''Plasmodium'' spp. と''Cryptosporidium'' spp.の生活環は似ている
**oocystの中にsporozoiteが含まれている
***"oo" means egg
**ただしCはoocystで伝播するがPはoocystによる伝播ではない
==Reproduction of protozoa==
{|class="wikitable" style="width:600px"
|-
!style="width:200px|asexual<br>(fission)
!style="width:200px|sexual<br>(zygote)
!style="width:200px|both of <br>asexual and sexual
|-
|
*[[Amoebiasis|Intestinal amoeba]]
*[[Giardiasis|''Giardia'']]
|
*[[Malaria|''Plasmodium'']]
*[[Cryptosporidiasis|''Cryptosporidium'']]
*[[Cyclosporiasis|''Cyclospora'']]
*[[Isosporiasis|''Isospora'']]
|
*''Trypanosoma''
*[[Leishmaniasis|''Leishmania'']]
|}
==Transmission==
===By form===
*cyst: ''Entamoeba hystolytica''
*oocyst: ''Cryptosporidium'' spp.
===By route===
*fecal-oral: ''Giarida intestinalis''
*vector-borne: ''Trypanosoma'' spp., ''Plasmodium'' spp., ''Leishmania'' spp.
*air-borne: nothing
*vertical: ''Toxoplasma gondii''
===nitazoxanide===
*broad spectrum against protozoas and helminths
