Question:
Widal Test is used for diagnosis of _________.
Widal Test is used for diagnosis of _________.
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The Widal test detects antibodies against Salmonella typhi, the cause of typhoid.
Updated On: Nov 12, 2026
- Pneumonia
- AIDS
- Typhoid
- Malaria
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Typhoid is an enteric fever caused by the bacterium Salmonella typhi.
Step 2: The Widal test
The patient's serum is mixed with Salmonella antigens.
Visible clumping (agglutination) shows that antibodies are present, confirming typhoid.
Step 3: Why the other options fail
AIDS is tested by ELISA, malaria by blood smear and pneumonia by other methods such as chest X-ray.
Final Answer:
The Widal test diagnoses typhoid. \[ \boxed{\text{(C) }\text{Typhoid}} \]
Typhoid is an enteric fever caused by the bacterium Salmonella typhi.
Step 2: The Widal test
The patient's serum is mixed with Salmonella antigens.
Visible clumping (agglutination) shows that antibodies are present, confirming typhoid.
Step 3: Why the other options fail
AIDS is tested by ELISA, malaria by blood smear and pneumonia by other methods such as chest X-ray.
Final Answer:
The Widal test diagnoses typhoid. \[ \boxed{\text{(C) }\text{Typhoid}} \]
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