Infection and Immunity to Vibrio cholerae, Salmonella typhimurium and Escherichia coli in a Rabbit Model
Identifieur interne : 001334 ( Main/Exploration ); précédent : 001333; suivant : 001335Infection and Immunity to Vibrio cholerae, Salmonella typhimurium and Escherichia coli in a Rabbit Model
Auteurs : Piet A. M. Guinée [Pays-Bas] ; Wim H. Jansen [Pays-Bas] ; Sjoerd G. T. Rijpkema [Pays-Bas]Source :
- Zentralblatt fur Bakteriologie, Mikrobiologie und Hygiene / A: Medical Microbiology, Infectious Diseases, Virology, Parasitology [ 0176-6724 ] ; 1988.
Abstract
Cholera disease can be induced in the rabbit by duodenal inoculation (DI) of Vibrio cholerae organisms after ligation of the cecum (C) (DIC model). When ligation of the cecum is omitted, no disease symptoms develop. In contrast, the animals are primed which becomes apparent as vibriocidal protection upon challenge with V. cholerae in the DIC model. This protection coincides with high anti-O antigen IgA levels in the bile. The O antigen was shown to be the protective antigen and it must be presented by live organisms. A non-enterotoxigenic mutant of V. cholerae induced protective immunity in the rabbit but was reported to cause mild diarrhea in human volunteers. Looking for alternatives, we applied cholera toxin, known as a mucosal adjuvant, together with killed V. cholerae cells to rabbits. Unfortunately, the minimum adjuvant dose was equal to the minimum toxic dose. A Salmonella typhimurium strain expressing also the V. cholerae O antigen induced systemic rather than local immunity which was not protective. Several Escherichia coli strains were able to elicit a local immune response, but the animal to animal differences were considerable. Therefore, V. cholerae itself was thought to be the most appropriate carrier organism. Some non-enterotoxigenic and auxotrophic mutants of V. cholerae were able to prime and did not show any undesired side-effects in the DIC model. Therefore, further attenuation of non-toxigenic V. cholerae strains by means of stable deletions in nutritional genes seems to be the most promising way to obtain acceptable vaccine candidates.
Url:
DOI: 10.1016/S0176-6724(88)80162-7
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When ligation of the cecum is omitted, no disease symptoms develop. In contrast, the animals are primed which becomes apparent as vibriocidal protection upon challenge with V. cholerae in the DIC model. This protection coincides with high anti-O antigen IgA levels in the bile. The O antigen was shown to be the protective antigen and it must be presented by live organisms. A non-enterotoxigenic mutant of V. cholerae induced protective immunity in the rabbit but was reported to cause mild diarrhea in human volunteers. Looking for alternatives, we applied cholera toxin, known as a mucosal adjuvant, together with killed V. cholerae cells to rabbits. Unfortunately, the minimum adjuvant dose was equal to the minimum toxic dose. A Salmonella typhimurium strain expressing also the V. cholerae O antigen induced systemic rather than local immunity which was not protective. Several Escherichia coli strains were able to elicit a local immune response, but the animal to animal differences were considerable. Therefore, V. cholerae itself was thought to be the most appropriate carrier organism. Some non-enterotoxigenic and auxotrophic mutants of V. cholerae were able to prime and did not show any undesired side-effects in the DIC model. Therefore, further attenuation of non-toxigenic V. cholerae strains by means of stable deletions in nutritional genes seems to be the most promising way to obtain acceptable vaccine candidates.</div></front></TEI><affiliations><list><country><li>Pays-Bas</li></country></list><tree><country name="Pays-Bas"><noRegion><name sortKey="Guinee, Piet A M" sort="Guinee, Piet A M" uniqKey="Guinee P" first="Piet A. M." last="Guinée">Piet A. M. Guinée</name></noRegion><name sortKey="Jansen, Wim H" sort="Jansen, Wim H" uniqKey="Jansen W" first="Wim H." last="Jansen">Wim H. Jansen</name><name sortKey="Rijpkema, Sjoerd G T" sort="Rijpkema, Sjoerd G T" uniqKey="Rijpkema S" first="Sjoerd G. T." last="Rijpkema">Sjoerd G. T. Rijpkema</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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