The H-antigen in Salmonella typhi is associated with

Step-by-step solution

In Salmonella typhi , there are three main types of surface antigens: 1. O-antigen (Somatic antigen): It is associated with the cell wall (lipopolysaccharide). 2. H-antigen (Flagellar antigen): It is associated with the flagella and is proteinaceous in nature. 3. Vi-antigen (Capsular antigen): It is a surface polysaccharide associated with the capsule. Therefore, the H-antigen is associated with the flagella. Answer: Flagella