- The causative agent is the Entamoeba histolytica.
- trophozoites die quickly outside the intestine, therefore, not important in the spread of infection.
- The cyst is the infective element tetragenicity that resists chlorination of water and environmental conditions.
- The main reservoir host is the man.
Habitat: Intestine of Man.
route of infection: Oral.
transmission of infection occurs via fecal - oral direct, aided by poor sanitary conditions and sexual contact bucoanal.
- through ingestion of drinking water and contaminated food, of poor food handling and through mechanical vectors, can be transmitted infections especially in indirect ways poor regions of the world sound, with and drinking water shortages and lack of sewage systems.
- is the third most important parasitic disease worldwide.
Its worldwide prevalence is 10%. Mostly in underdeveloped countries and in tropical areas, 50 - 80%
- is more common in adults and is equally distributed by gender and race.
The infection is more frequent than the disease, only 10% of the infected patient. According
isoenzyme patterns amoebas have been classified into pathogenic and nonpathogenic strains, according to zymodemes, 9 are pathogenic worth clarifying that there are more than 20 zymodemes, of which half are associated with liver abscess or intestinal ulceration.
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