Incorrect about Entamoeba histolytica or amoebiasis is

Options

A. parasite of small intestine
B. causes dysentery
C. houseflies are mechanical carries
D. symptoms include constipation, abdominal pain and cramp.

Answer

To determine which statement about Entamoeba histolytica (the causative agent of amoebiasis) is incorrect, we will analyze the characteristics and life cycle of this protozoan parasite.

### Step-by-Step Solution:

1. **Identify the Organism**:
- Entamoeba histolytica is a protozoan parasite responsible for the disease known as amoebiasis.

2. **Location of Infection**:
- This parasite primarily infects the large intestine of humans, causing inflammation and other gastrointestinal symptoms.

3. **Life Cycle**:
- The life cycle of Entamoeba histolytica does not require an intermediate host. It involves the passage of mature cysts in the feces of an infected individual.

4. **Transmission**:
- Infection occurs when another person ingests the cysts through contaminated food or water. Contamination can occur via mechanical carriers, such as houseflies.

5. **Survival and Transformation**:
- The cysts can survive the acidic environment of the stomach and transform into trophozoites in the small intestine. These trophozoites then migrate to the large intestine, where they multiply.

6. **Symptoms of Infection**:
- The infection can lead to symptoms such as abdominal pain, cramps, and constipation.

7. **Evaluate the Options**:
- Based on the information above, if one of the options states that Entamoeba histolytica is a parasite of the small intestine, this statement is incorrect. The correct location of infection is the large intestine.

### Conclusion:
The incorrect statement about Entamoeba histolytica is that it is a parasite of the small intestine. In reality, it is a parasite of the large intestine.

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