Amoebiasis pathophysiology: Difference between revisions
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==Overview== | ==Overview== | ||
Symptoms can range from mild diarrhoea to [[dysentery]] with blood and mucus. The blood comes from amoebae invading the lining of the intestine. In about 10% of invasive cases the amoebae enter the bloodstream and may travel to other organs in the body. Most commonly this means the liver, as this is where blood from the intestine reaches first, but they can end up almost anywhere. | Symptoms can range from mild diarrhoea to [[dysentery]] with blood and mucus. The blood comes from amoebae invading the lining of the intestine. In about 10% of invasive cases the amoebae enter the bloodstream and may travel to other organs in the body. Most commonly this means the liver, as this is where blood from the intestine reaches first, but they can end up almost anywhere. | ||
==Transmission== | ==Transmission== | ||
Revision as of 19:35, 24 January 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Symptoms can range from mild diarrhoea to dysentery with blood and mucus. The blood comes from amoebae invading the lining of the intestine. In about 10% of invasive cases the amoebae enter the bloodstream and may travel to other organs in the body. Most commonly this means the liver, as this is where blood from the intestine reaches first, but they can end up almost anywhere.
Transmission
Amoebiasis is usually transmitted by , but it can also be transmitted indirectly through contact with dirty hands or objects as well as by oral-anal contact.
Amoebiasis is usually transmitted by the fecal-oral route (contamination of drinking water and foods with fecal matter), but it can also be transmitted indirectly through contact with dirty hands or objects as well as by anal-oral contact.
Infection is spread through ingestion of the cyst form of the parasite, a semi-dormant and hardy structure found in feces. Free-living amoebae, or trophozoites, that do not form cysts but die quickly after leaving the body may also be present: these are rarely the source of new infections.
Amoebic dysentery is often confused with "traveler's diarrhea", or "Montezuma's Revenge" in Mexico, because of the prevalence of both in developing nations. In fact, most traveler's diarrhea is bacterial or viral in origin.
Liver abscesses can occur without previous development of amoebic dysentery.