Agglutination with 'O' antigen of S. typhi is inhibited by :-
Agglutination with 'O' antigen of S. typhi is inhibited by Vi antigen. Vi antigen: Surface polysaccharide envelope or capsular antigen covering the O antigen. Prevents its agglutination with O antiserum. Phage typing of S. typhi can be done by using Vi specific bacteriophages. Used for vaccination.
Vi Ag
Flageller
F antigen
All the above
Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli)