O‐Antigenic Cross‐Reactivity In Fusobacterium Nucleatum

Abstract
Lipopolysaccharides (LPS) of the same chemotype isolated from 7 strains of F. nucleatum were examined by indirect hemagglutination and hemagglutination inhibition in unabsorbed and absorbed antisera. Four common major antigenic specificities were detected, and 2 of the LPS examined contained antigenic specificities not shared with any of the other LPS. A few weak cross-reactions were also observed, with some LPS of other chemotypes.