Which one of the following disease is spread by housefly ?

Options

A. Filariasis
B. Typhoid
C. Encephalities
D. Dengue fever

Answer

To determine which disease is spread by houseflies, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Houseflies**:
- Houseflies are known to be carriers of various pathogens. They often land on waste materials and can pick up bacteria and viruses.

2. **Identify How Houseflies Spread Diseases**:
- When houseflies land on food or water, they can transfer pathogens from their bodies (legs and hair) to the food or water, leading to contamination.

3. **List Common Diseases Associated with Houseflies**:
- Some diseases that are commonly spread by houseflies include typhoid and cholera.

4. **Evaluate the Given Options**:
- If the options include diseases like filariasis, encephalitis, dengue fever, and typhoid, we need to analyze each:
- **Filariasis**: Caused by a roundworm and spread by mosquitoes, not houseflies.
- **Encephalitis**: Caused by viral infections, typically spread by mosquitoes and ticks.
- **Dengue Fever**: Caused by the dengue virus, spread by Aedes mosquitoes.
- **Typhoid**: Caused by the bacterium Salmonella typhi, and can be spread by houseflies.

5. **Select the Correct Answer**:
- Based on the analysis, the disease that is spread by houseflies is **typhoid**.

### Final Answer:
The disease spread by houseflies is **typhoid**.

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