Question

Widal test is used for the diagnosis of which disease?

• A. Pneumonia
• B. Typhoid
• C. Malaria
• D. Cholera

Hint:

The Widal test is primarily used for diagnosing typhoid fever caused by *Salmonella typhi*.

Answer 1

The Correct Option is B

Step 1: Understanding the Widal Test.
The Widal test is a diagnostic test used to detect the presence of antibodies against the bacteria *Salmonella typhi*, the causative agent of typhoid fever. It is commonly used in clinical laboratories to diagnose typhoid.

Step 2: Analysis of options.
- (A) Pneumonia: Pneumonia is caused by different pathogens like bacteria, viruses, or fungi, but not by *Salmonella typhi*. The Widal test is not used for pneumonia diagnosis.
- (B) Typhoid: Typhoid fever is caused by *Salmonella typhi*, and the Widal test is specifically used for diagnosing this disease.
- (C) Malaria: Malaria is caused by *Plasmodium* parasites, not *Salmonella typhi*, and is diagnosed through blood tests like the Rapid Diagnostic Test (RDT) or blood smear examination, not the Widal test.
- (D) Cholera: Cholera is caused by *Vibrio cholerae*, not *Salmonella typhi*, so the Widal test is not used for cholera diagnosis.

Step 3: Conclusion.
The Widal test is used to diagnose Typhoid fever, making option (B) the correct answer.