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

1. (a) Plasmodium vivax / UTI test
2. (b) Streptococcus pneumoniae / Widal test
3. (c) Salmonella typhi / Anthrone test
4. (d) Salmonella typhi / Widal test

Correct answer: (d) Salmonella typhi / Widal test

Solution

Typhoid fever is caused by Salmonella typhi. The Widal test detects antibodies against Salmonella antigens and is the standard confirmatory test among the options given.

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