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Apr 17, 2023 · The pathological range includes mucosal inflammation, thickening, ulcers, and necrosis, leading to perforation. Amoebic cysteine proteinases can also contribute to trophozoites' ability to suppress a host’s immune response by being able to cleave and inactivate anaphylatoxins C3a, C5a, IgA, and IgG. [2]
- Arthur Chou, Richard L. Austin
- 2023/04/17
- Causal Agents
- Life Cycle
- Geographic Distribution
Several protozoan species in the genus Entamoeba colonize humans, but not all of them are associated with disease. Entamoeba histolytica is well recognized as a pathogenic ameba, associated with intestinal and extraintestinal infections. Other morphologically-identical Entamoeba spp., including E. dispar, E. moshkovskii, and E. bangladeshi, are gen...
Cysts and trophozoites are passed in feces . Cysts are typically found in formed stool, whereas trophozoites are typically found in diarrheal stool. Infection with Entamoeba histolytica (and E.dispar) occurs via ingestion of mature cysts from fecally contaminated food, water, or hands. Exposure to infectious cysts and trophozoites in fecal matter d...
Pathogenic Entamoeba species occur worldwide and are frequently recovered from fresh water contaminated with human feces. The majority of amebiasis cases occur in developing countries. In industrialized countries, risk groups include men who have sex with men, travelers, recent immigrants, immunocompromised persons, and institutionalized population...
Entamoeba histolytica is the pathogenic species of Entamoeba that causes amebic dysentery and a wide range of other invasive diseases, including amebic liver abscess, respiratory tract infections, and cerebral and genitourinary amebiasis.
- R. Fotedar, D. Stark, N. Beebe, D. Marriott, J. T. Ellis, J. Harkness
- 10.1128/CMR.00004-07
- 2007
- Clin Microbiol Rev. 2007 Jul; 20(3): 511-532.
Dec 2, 2018 · Entamoeba histolytica is an invasive enteric protozoan [1, 2, 10]. Infection typically begins with the ingestion of mature, quadrinucleated cysts found in fecally contaminated food or water. Excystation occurs in the small intestine with the release of motile trophozoites, which migrate to the large intestine.
- Micaella Kantor, Anarella Abrantes, Andrea Estevez, Alan Schiller, Jose Torrent, Jose Gascon, Robert...
- 2018
Amebiasis is infection with Entamoeba histolytica. It is acquired by fecal-oral transmission. Infection is commonly asymptomatic, but symptoms ranging from mild diarrhea to severe dysentery may occur. Extraintestinal infections include liver abscesses. Diagnosis is by identifying E. histolytica
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What is Entamoeba histolytica?
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How are pathogenic Entamoeba histolytica infections differentiated from nonpathogenic infections?
Amebiasis is defined as infection with Entamoeba histolytica, regardless of associated symptomatology. In resource-rich nations, this parasitic protozoan is seen primarily in travelers to and emigrants from endemic areas. Infections range from asymptomatic colonization to amebic colitis and life-threatening abscesses.
Nov 22, 2023 · Intestinal amebiasis is caused by the protozoan Entamoeba histolytica. There are four species of intestinal amebae with identical morphologic characteristics: E. histolytica, E. dispar, E. moshkovskii, and E. bangladeshi [ 1,2 ].
