二、Pathogenic factors
1.toxicity of parasites pathogenic-nonpathogenic complex.
Entamoeba histolytica
Entamoeba dispar
2.symbiotic bacteria
3.defence barrier immunity
三、pathology
pinpoint lesion on mucous membrane
flask-shaped crateriform ulcers
Diagosis
|
trophozoite |
cyst | |
| specimen |
feces |
feces |
|
method |
direct smear with normal saline | direct smear with iodine stain |
|
diseases |
amoebic dysentery | chronic intestinal amoebiasis or carriers |
|
remarks |
1.container must clean 2.examined soon after they have been passed. 3.select bloody and mucous portion. |
Epidemiology
Distribution: tropical and subtropical areas.
Media: flies; black beetles etc.
Treatment and prevention
treatment:
diodoquin-carriers
metronidazole-dysentery
prevention
human feces should not be used as fetilizer
food and drinks must be protected from flies
personal hygiene: wash hands after defecation and before meals.
