「Amoebiasis」の版間の差分
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Vaccipedia.admin (トーク | 投稿記録) (ページの作成:「''Entamoeba histolytica'' ==epidemiology== *worldwide *40-50 mil. cases per year *40,000-50,000 per year *sexual transmission in developed countries」) |
Vaccipedia.admin (トーク | 投稿記録) |
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| 1行目: | 1行目: | ||
| − | ''Entamoeba histolytica'' | + | ==''Entamoeba histolytica''== |
| − | ==epidemiology== | + | ===epidemiology=== |
*worldwide | *worldwide | ||
| − | *40-50 mil. cases per year | + | *40-50 mil. symptomatic cases per year |
| + | *number of asymptomatic cases unknown | ||
*40,000-50,000 per year | *40,000-50,000 per year | ||
*sexual transmission in developed countries | *sexual transmission in developed countries | ||
| + | |||
| + | ===life cycle and pathophysiology=== | ||
| + | *feco-oral infection of cyst | ||
| + | *hutch in small intestine into trophozoite | ||
| + | *reside in large intestine | ||
| + | *propagate by binary fission | ||
| + | *some penetrate large intestine wall | ||
| + | **bloody diarrea | ||
| + | **trophozoites phagocityze RBC | ||
| + | **only RBC phagocitizing trophozoite means infection | ||
| + | **non-RBC-phagocitizing trophozoite means colonization | ||
| + | *some invade into portal vein through liver | ||
| + | **liver abscess | ||
| + | *some encyst in large intestine | ||
| + | *cysts are excreted from anus | ||
| + | |||
| + | ===morphology=== | ||
| + | *trophozoite 20-50 μm | ||
| + | *cyst has 4 nuclei, each nucleus has a nucleolus | ||
| + | |||
| + | ==''Entamoeba dispar== | ||
| + | *formerly named as ''E. histolytica'' in 1903 | ||
| + | *non-pathogenic type of old ''E. histolytica'' was distinguished as ''E. dispar'' in 1925 | ||
| + | |||
| + | ===distribution=== | ||
| + | *''E. disper'' vs ''E. histolytica'' | ||
| + | **3:1 in developing countries | ||
| + | **10:1 in developed countries | ||
2021年4月27日 (火) 09:33時点における版
目次
Entamoeba histolytica
epidemiology
- worldwide
- 40-50 mil. symptomatic cases per year
- number of asymptomatic cases unknown
- 40,000-50,000 per year
- sexual transmission in developed countries
life cycle and pathophysiology
- feco-oral infection of cyst
- hutch in small intestine into trophozoite
- reside in large intestine
- propagate by binary fission
- some penetrate large intestine wall
- bloody diarrea
- trophozoites phagocityze RBC
- only RBC phagocitizing trophozoite means infection
- non-RBC-phagocitizing trophozoite means colonization
- some invade into portal vein through liver
- liver abscess
- some encyst in large intestine
- cysts are excreted from anus
morphology
- trophozoite 20-50 μm
- cyst has 4 nuclei, each nucleus has a nucleolus
Entamoeba dispar
- formerly named as E. histolytica in 1903
- non-pathogenic type of old E. histolytica was distinguished as E. dispar in 1925
distribution
- E. disper vs E. histolytica
- 3:1 in developing countries
- 10:1 in developed countries
