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 one by one:

1. **Typhoid**:
- Typhoid is caused by the bacterium *Salmonella typhi*.
- Therefore, typhoid is a bacterial disease.

2. **Pneumonia**:
- Pneumonia can be caused by various pathogens, including bacteria, viruses, and fungi.
- However, bacterial pneumonia is a common form, often caused by *Streptococcus pneumoniae*.
- Thus, pneumonia is also considered a bacterial disease.

3. **Malaria**:
- Malaria is caused by a parasite known as *Plasmodium* (specifically *Plasmodium falciparum*, *Plasmodium vivax*, etc.).
- Therefore, malaria is not a bacterial disease.

4. **Amoebiasis**:
- Amoebiasis is caused by the protozoan parasite *Entamoeba histolytica*.
- Hence, amoebiasis is not a bacterial disease.

5. **Ascariasis**:
- Ascariasis is caused by the roundworm *Ascaris lumbricoides*.
- Thus, ascariasis is not a bacterial disease.

6. **Filariasis**:
- Filariasis is caused by parasitic worms, specifically filarial worms (like *Wuchereria bancrofti*).
- Therefore, filariasis is not a bacterial disease.

7. **Common Cold**:
- The common cold is primarily caused by viruses, such as rhinoviruses.
- Thus, the common cold is not a bacterial disease.

Now, let's summarize the findings:
- **Diseases caused by bacteria**:
- Typhoid
- Pneumonia

- **Diseases NOT caused by bacteria**:
- Malaria
- Amoebiasis
- Ascariasis
- Filariasis
- Common cold

In total, there are **2 diseases** from the list that are caused by bacteria.

**Final Answer**: 2

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