Name the pathogen that causes amoebiasis in human . Given the symptoms and the mode of transmission of the disease.

Explanation

**Step-by-Step Solution:**

1. **Identify the Pathogen**: The pathogen that causes amoebiasis in humans is **Entamoeba histolytica**. This is a protozoan parasite that primarily infects the large intestine.

2. **List the Symptoms**: The symptoms associated with amoebiasis (also known as amoebic dysentery) include:
- Constipation
- Abdominal pain or cramps
- Stool that may contain excessive mucus or blood clots
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