How does amoebiasis occur in human beings?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Disease**: Amoebiasis is a disease caused by a protozoan parasite known as Entamoeba histolytica. This organism is responsible for causing amoebic dysentery.

2. **Mode of Transmission**: The primary mode of transmission of amoebiasis in humans is through the ingestion of tetranucleate cysts of Entamoeba histolytica. These cysts are typically found in contaminated food or water.

3. **Infection Process**: When a person consumes food or water contaminated with these cysts, the cysts enter the digestive system. They then reach the large intestine, where they excyst and release trophozoites (the active form of the parasite).

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