Trichuris trichiura resides in

Options

A. Duodenum
B. Jejunum
C. Ileum
D. Caecum and colon

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The organism in question is Trichuris trichiura, which is a parasitic roundworm commonly referred to as whipworm.

2. **Understand the Habitat**: Trichuris trichiura is primarily found in the tropical regions, where it poses significant health issues.

3. **Life Cycle and Infection**: The eggs of Trichuris trichiura are transmitted through contaminated soil. When humans ingest these eggs, they hatch in the small intestine.

4. **Migration to the Large Intestine**: After hatching, the larvae migrate to the large intestine, specifically to the cecum and ascending colon.

5. **Permanent Residence**: Once in the large intestine, Trichuris trichiura embeds its anterior whip-like end into the mucosal tissue, where it resides for an extended period, often for years.

6. **Egg Production**: After approximately 60 to 70 days of infection, the female whipworm begins to release unembryonated eggs into the cecum.

7. **Conclusion**: Therefore, Trichuris trichiura resides in the cecum and colon of the human large intestine.

**Final Answer**: Trichuris trichiura resides in the cecum and colon of the human large intestine.

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