Question

Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.

• A. Plasmodium vivax / UTI test.
• B. Streptococcus pneumoniae / Widal test.
• C. Salmonella typhi / Anthrone test.
• D. Salmonella typhi / Widal test.

Answer 1

The correct option is D

Salmonella typhi / Widal test.

The correct option is D.

Explanation for the correct option:

1. Typhoid is a bacterial infection that is spread through contaminated water. There are numerous typhoid vaccines available.
2. Salmonella typhi: It is a typhoid causative agent.
3. It is mostly caused by contaminated food and water.
4. The Widal test is used to confirm typhoid infection based on the antigen-antibody reaction.

Explanation for the incorrect options:

Option A:

1. Plasmodium vivax is a parasitic protozoan.
2. This is widely used in the transmission of malaria.
3. UTI test: This test is used to perform a urinalysis. It is used to diagnose urinary tract problems.

Option B:

1. It is a gram-positive bacterium called Streptococcus pneumonia.
2. It lives in the human respiratory tract as a commensal organism.
3. The Widal test is used to confirm typhoid infection.

Option C:

1. Salmonella typhi: It is a typhoid causative agent.
2. It is primarily caused by contaminated food and water.
3. Anthrone test: This is the most common test for carbohydrate deficiency.
4. When carbohydrates react with concentrated sulphuric acid to form furfural, they become dehydrated.

Final answer: Salmonella typhi / Widal test is representing the causative agent of typhoid fever and the confirmatory test for typhoid.