title: Protection against Vibrio cholerae infection afforded by fragments of anti-haemagglutinin.
abstract: The finding that Fab fragments of the anti-E1 Tor haemagglutinin were able to afford protection in vivo (low but significant), as well as a significant reduction in Vibrio cholerae adherence to isolated intestinal epithelial cells in-vitro, implicate that masking of these cell-bound haemagglutinin sites per se, would be sufficient to confer protection in E1 Tor cholera infection. Subsequently, the related working hypothesis that the E1 Tor cell-bound haemagglutinin is playing an adhesive role is validated. In natural immunity, it could be envisaged that antiserum to this cell-bound haemagglutinin of V. cholerae E1 Tor would be highly protective due to the synergistic effects of the dual protective mechanisms in operation at the intestinal sites viz. a masking and agglutinating phenomenon.
mesh_terms: D000818:Animals; D002771:Cholera / Q000276:immunology*; D007140:Immunoglobulin Fab Fragments / Q000276:immunology* / Q000302:isolation & purification; D007074:Immunoglobulin G / Q000276:immunology* / Q000302:isolation & purification; D051379:Mice; D011817:Rabbits; D014734:Vibrio cholerae / Q000276:immunology
chemical_list: D007140:Immunoglobulin Fab Fragments; D007074:Immunoglobulin G