The O‐Polysaccharide of Lipopolysaccharide Isolated from Vibrio fluvialis O19 Is Identical to That of Vibrio Bioserogroup 1875 Variant

A structural analysis has been carried out on the O-polysaccharide of lipopolysaccharide (LPS) isolated from Vibrio fluvialis 181–86 (Kobe) serotype O19 (019) which has the Inaba antigen factor C of O1 V. cholerae and factors D and E in common with Vibrio bioserogroup 1875. The O-polysaccharide of O19 was characterized as an α (12)-linked homopolymer of N-3-hydroxypropionyl-d-perosamine (4-amino-4,6-dideoxy-d-mannopyranose), which was identical to that of Vibrio bioserogroup 1875 Variant. Passive hemolysis and passive hemolysis inhibition analysis performed using anti-factor D, E and anti-factor E antisera, demonstrated that the LPS from O19 harbored O-antigenic factors identical to those of the LPS from Vibrio bioserogroup 1875 Variant.