Choose the correct option wrt. Amoebic dysentry

Options

A. It is caused by a multicellular protozoan, parasite,Entamoeba
B. Entamoeba is present in small intestine of human
C. Housefly acts as mechanical carriers
D. Reserve food material of E.histolytica is starch and glycogen

Answer

To solve the question regarding amoebic dysentery, we need to evaluate each of the provided options one by one.

### Step-by-Step Solution:

1. **Evaluate Option 1**:
- The statement claims that amoebic dysentery is caused by a multicellular protozoan parasite and amoeba.
- **Analysis**: Amoebic dysentery is actually caused by a unicellular protozoan called *Entamoeba histolytica*, not a multicellular organism.
- **Conclusion**: This option is incorrect.

**Hint**: Remember that amoebic dysentery is caused by a unicellular organism, not a multicellular one.

2. **Evaluate Option 2**:
- The statement claims that *Entamoeba histolytica* is present in the small intestine of humans.
- **Analysis**: In reality, *Entamoeba histolytica* resides in the large intestine of humans, where it causes dysentery.
- **Conclusion**: This option is also incorrect.

**Hint**: Consider where the parasite is typically found in the human body when assessing this option.

3. **Evaluate Option 3**:
- The statement claims that houseflies act as mechanical carriers for amoebic dysentery.
- **Analysis**: This is true; houseflies can carry the cysts of *Entamoeba histolytica* from contaminated feces to food, facilitating the spread of the disease.
- **Conclusion**: This option is correct.

**Hint**: Think about how diseases can be transmitted by insects and the role of houseflies in this context.

4. **Evaluate Option 4**:
- The statement claims that the reserve food material of *Entamoeba histolytica* is starch and glycogen.
- **Analysis**: The reserve food material in *Entamoeba histolytica* is primarily glycogen, not starch.
- **Conclusion**: This option is incorrect.

**Hint**: Focus on the specific types of reserve materials found in protozoans when considering this option.

### Final Conclusion:
After evaluating all options, the correct answer is **Option 3**, which states that houseflies act as mechanical carriers for amoebic dysentery.