Abstract
SUMMARY1. The strains of B. typhosus, which are inagglutinable, or non-sensitive to somatic O agglutinins, are virulent, whereas the agglutinable, or sensitive strains, show a low virulence.2. Virulence and inagglutinability of strains seem to depend upon the presence in them of a virulence (Vi) antigen.3. A considerable protective action, observed by means of active and passive immunisation, is exerted by the inagglutinable strain used (205 D), because it contains Vi antigen.4. When the O and H agglutinins are eliminated through absorption, the agglutination reaction may serve to demonstrate in vitro the presence of the Vi antibody.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
