A 24 year-old cook in a hostel mess suffered from enteric fever 2 years back. The chronic carrier state in this patient can be diagnosed by -: (A) Vi agglutination test., (B) Blood Culture in Brain Heart infusion broth., (C) Widal test, (D) All of the above
Answer is A. Vi agglutinins of titer of > 1:10 is taken significant for diagnosis of Typhoidal carriers