All are true about widel test except________________________?
Correct answer: B. O antibodiest last longer and hence is not indicative of recent infection
- A. Base lines differ depending on the endemicity of the disease
- B. O antibodiest last longer and hence is not indicative of recent infection
- C. H antigen cannot differentiate between subtypes
- D. High titre value in a single widal test is not confirmative
Explanation
The statement about O antibodies is false because O agglutinins appear early and decline relatively soon, making them more useful for recent infection. H antibodies persist longer and therefore are less indicative of current infection.
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