KVV E-Modules - Entamoeba histolytica Life Cycle

Quadrant -I (Video)

Entamoeba histolytica Life Cycle

Entamoeba histolytica is a pathogenic parasite in the intestine of human beings and many other primates. It inhabits the mucous and sub-mucous layers of the large intestine. It feeds mainly …

Quadrant - II (Study Material)

1. Entamoeba histolytica Life Cycle

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Quadrant - III (Assignments)

1. Entamoeba histolytica Life Cycle

Entamoeba histolytica is a pathogenic parasite in the intestine of human beings and many other primates. It inhabits the mucous and sub-mucous layers of the large intestine. It feeds mainly on the tissues of the intestinal wall and often produces severe ulcers and abscesses. In chronic cases, it may enter the blood circulation to reach the liver, lung, brain and other organs. It causes a serious and often fatal disease known as amoebic dysentery or amoebiasis.

2. Entamoeba histolytica Life Cycle

Quadrant - IV (MCQs)

What is the infective stage of Entamoeba histolytica

A: Trophozoite B: Cyst C: Trophozoite and cyst D: Merozoite

Where does the cyst of Entamoeba histolytica mature?

A: Stomach B: Large intestine C: Small intestine D: Liver

The trophozoite stage of Entamoeba histolytica is most commonly found in the:

A: Stomach B: Small intestine C: Large intestine D: Liver

Which of the following is responsible for the transmission of Entamoeba histolytica

A: Inhalation of spores B: Fecal-oral route C: Vector transmission via mosquitoes D: Airborne droplets

In which of the following locations does Entamoeba histolytica undergo excystation?

A: Large intestine B: Small intestine C: Rectum D: Liver

Which of the following describes the encystation of Entamoeba histolytica

A: The trophozoite develops into a cyst in the large intestine. B: The trophozoite forms a cyst in the liver. C: The trophozoite bursts in the small intestine. D: The cyst forms in the stomach and is released into the environment.

Entamoeba histolytica cysts have _________ nuclei.

A: 1-4 B: 5 C: 9 D: 6-8

How does Entamoeba histolytica primarily damage the intestinal mucosa?

A: By secreting toxins B: By forming cysts in the cells C: By causing hyperplasia of the epithelial cells D: By phagocytosing red blood cells

How does the cyst of Entamoeba histolytica enter the human body?

A: By ingestion of contaminated food or water B: By ingestion of contaminated food or water C: By inhalation of droplets D: Through a mosquito bite

After excystation in the small intestine, what is the first stage of Entamoeba histolytica?

A: Immature trophozoite B: Mature cyst C: Trophozoite D: Merozoite

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