Abstract
Previously a N-acetyl-d-glucosamine specific cell-associated haemagglutinin (HA) had been purified from a Vibrio cholerae O1 strain. This study documents the role of this purified HA as an adhesin of V. cholerae O1. A significant inhibition in the adhesion of V. cholerae O1 bacterial cells to isolated rabbit intestinal brush borders (RIBB) was observed when the latter were pretreated with purified HA in ELISA. Antibody raised against purified HA and Fab (IgG) fragment of this serum inhibited adhesion of the bacteria to isolated rabbit intestinal epithelial cells (RIEC). V. cholerae O1 (both Ogawa and Inaba serovars) showed less adherence to isolated RIEC of animals immunised with the purified HA. Patients convalescing from V. cholerae O1 infection showed high ELISA titres against the purified HA indicating that it is expressed in the host during the disease process.
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