Entamoeba Histolytica Overview

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Questions and Answers

What is the primary habitat of Entamoeba histolytica in humans?

Stomach
Small intestine
Large intestine (correct)
Bloodstream

Which of the following structures is characteristic of the Trophozoite stage of Entamoeba histolytica?

Chitinous shell
Pseudopodia (correct)
Flagella
Cilia

What type of disease is commonly associated with Entamoeba histolytica infection?

Malaria
Toxoplasmosis
Giardiasis
Amoebiasis (correct)

Which stage of Entamoeba histolytica is identified as having a vacuole containing REC?

<p>Trophozoite (D)</p> Signup and view all the answers

What is a common mode of transmission for Entamoeba histolytica?

<p>Contaminated food and water (C)</p> Signup and view all the answers

Flashcards

Trophozoite stage of Entamoeba histolytica

The active, feeding stage of Entamoeba histolytica, characterized by pseudopodia for movement, a nucleus with a karyosome, and a vacuole containing ingested red blood cells (REC).

Cyst stage of Entamoeba histolytica

The stage of Entamoeba histolytica that is resistant to harsh environments, allowing transmission outside the host.

Amoebiasis

The parasitic disease caused by Entamoeba histolytica that can lead to dysentery, abdominal pain, and liver abscesses.

Mode of Infection for Amoebiasis

The way Entamoeba histolytica spreads. It occurs through ingesting contaminated food or water containing the parasite's cysts.

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Incubation period of Amoebiasis

The time between infection with Entamoeba histolytica and the onset of symptoms, which typically ranges from several days to weeks.

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Study Notes

Entamoeba Histolytica

Classification: Kingdom - Protista, Phylum - Protozoa, Class - Rhizopoda, Genus - Entamoeba, Species - histolytica
Distribution: World-wide cosmopolitan
Habitat and Habitat: A common parasite in the large intestine of humans. Also found in amoebic abscesses and the submucosa of the large intestine.
Morphology: Exists in 3 stages: trophozoite, pre-cyst, cyst. Trophozoites have pseudopodia, ectoplasm, karyosome, nucleus, and a contractile vacuole.
Life Cycle: Relatively simple.
Mode of Infection:
Pathogenicity: Causes amoebiasis and liver abscesses.
Treatment:
Incubation period:
Prophylaxis: