Antigens of Enterobacteriaceae Clinical Microbiology Review 181
ANTIGEN ALTERNATE NAME LOCATION CHARACTERISTICS OTHER
O antigen Somatic antigen Cell wall Lipopolysaccharide, heat stable Used for serological grouping of
Salmonella& Shigella.
H antigen Flagellar antigen Flagella Proteins, heat labile Used to serotype Salmonella.
K antigen Capsular antigen Capsule Polysaccharide, heat labile, may Role in preventing phagocytosis.
mask O antigen. Removed by ↑virulence. Vi antigen is K antigen
heating produced by S. typhi.