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Question:

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

Plasmodium vivax/ UTI test

Streptococcus pneumoniae/ Widal test

Salmonella typhi/ Anthrone test

Salmonella typhi/ Widal test

Solution:

Correct option is D. Salmonella typhi/ Widal test. Salmonella typhi is the causative agent. Confirmatory test=Widal test, it's based on antigen antibody reaction. So the correct answer is "Salmonella typhi/ Widal test".