Presence of interferons in the body is indicative of infection of

Options

A. malaria
B. pneumonia
C. dengue
D. amoebiasis

Answer

To answer the question regarding the presence of interferons in the body and its indication of infection, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Interferons**:
- Interferons are proteins produced by cells in response to viral infections. They play a crucial role in the immune response by interfering with viral replication.

2. **Identify the Source of Interferons**:
- Interferons are secreted by virus-infected cells. Their primary function is to signal neighboring healthy cells to enhance their defenses against the virus.

3. **Analyze the Options**:
- The question provides four options regarding types of infections:
- Malaria (protozoal)
- Pneumonia (bacterial)
- Dengue (viral)
- Amoebiasis (protozoal)

4. **Determine the Type of Infections**:
- Malaria is caused by the protozoan Plasmodium vivax.
- Pneumonia is caused by bacteria such as Streptococcus pneumoniae and Haemophilus influenzae.
- Dengue is caused by the dengue virus, which is a viral infection.
- Amoebiasis is caused by the protozoan Entamoeba histolytica.

5. **Identify the Correct Answer**:
- Since interferons are specifically associated with viral infections, the only viral infection listed among the options is dengue. Therefore, the presence of interferons in the body indicates an infection of dengue.

6. **Conclude the Answer**:
- The correct answer to the question is **Dengue** (option 3).