How many of the following are diseases that can be caused by bacteria ?
Typhoid , Pneumonia , Malaria , Amoebiasis Ascariasis , Filariasis , Common cold

Options

A. 6
B. 5
C. 3
D. 2

Answer

To determine how many of the listed diseases are caused by bacteria, we will analyze each disease individually and identify the causative agents.

1. **Typhoid**:
- Causative Agent: Salmonella typhi
- Type: Bacteria
- Conclusion: Yes, this is caused by bacteria.

2. **Pneumonia**:
- Causative Agent: Streptococcus pneumoniae (among others)
- Type: Bacteria
- Conclusion: Yes, this is caused by bacteria.

3. **Malaria**:
- Causative Agent: Plasmodium (a protozoan)
- Type: Protozoa
- Conclusion: No, this is not caused by bacteria.

4. **Amoebiasis**:
- Causative Agent: Entamoeba histolytica (a protozoan)
- Type: Protozoa
- Conclusion: No, this is not caused by bacteria.

5. **Ascariasis**:
- Causative Agent: Ascaris lumbricoides (a nematode)
- Type: Nematode (worm)
- Conclusion: No, this is not caused by bacteria.

6. **Filariasis**:
- Causative Agent: Wuchereria bancrofti (a nematode)
- Type: Nematode (worm)
- Conclusion: No, this is not caused by bacteria.

7. **Common Cold**:
- Causative Agent: Rhinovirus (a virus)
- Type: Virus
- Conclusion: No, this is not caused by bacteria.

Now, let's summarize the findings:
- Diseases caused by bacteria: Typhoid and Pneumonia.
- Total number of diseases caused by bacteria: **2**.

Final Answer: **2**