The active form of Entamoeba-histolytica feeds upon

Options

A. mucosa and submucosa of colon only food in intestine
B. food in intestine
C. blood only
D. erthrocytes, mucosa and sumucosa of colon

Answer

**Step-by-Step Text Solution:**

1. **Identify the Organism**: The organism in question is Entamoeba histolytica, which is a protozoan parasite.

2. **Understand the Disease**: Entamoeba histolytica is responsible for a disease known as amoebiasis, which primarily affects the large intestine.

3. **Life Cycle Overview**: The life cycle of Entamoeba histolytica begins with the cyst form, which is spherical and found in feces. These cysts can contaminate food or water.

4. **Infection Process**: Once ingested, the cysts survive the acidic environment of the stomach and reach the intestine.

5. **Transformation**: In the intestine, the cysts transform into the active form known as trophozoites.

6. **Feeding Mechanism**: The trophozoites are the active feeding stage of Entamoeba histolytica. They feed on the mucosa (the innermost layer) and submucosa (the layer beneath the mucosa) of the colon.

7. **Additional Feeding**: Trophozoites can also feed on erythrocytes (red blood cells), which contributes to the pathology of the disease.

8. **Conclusion**: Therefore, the active form of Entamoeba histolytica feeds upon the mucosa and submucosa of the colon, as well as erythrocytes.

**Final Answer**: The active form of Entamoeba histolytica feeds upon the mucosa and submucosa of the colon and erythrocytes.

---