The infection of Entamoeba histolytica takes place by

Trophozoite

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Binucleated cyst

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Trinucleated cyst

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Quadrinucleated cyst

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Solution

The correct option is D Quadrinucleated cyst
Entamoeba histolytica is transmitted by the fecal-oral route by ingestion of infectious quadrinucleate cyst. Its multiplication takes place in the intestine and uninucleate trophozoite develops in the small intestine. Formation of quadrinucleate cyst takes place in the lower colon by two subsequent nuclear divisions. An infected person may pass up to 500 million cysts per day.

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