Identification of three highly attenuated Salmonella typhimurium mutants that are more immunogenic and protective in mice than a prototypical aroA mutant

Peter J. Valentine, Brian P. Devore, Fred Heffron

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    46 Scopus citations


    A panel of Salmonella typhimurium 14028s mutants, which were previously shown to be highly attenuated in the BALB/c mouse model of infection, were analyzed for their potential as live Salmonella oral-vaccine candidates. A prototypical aroA mutant was chosen as a basis of comparison. From the panel of routants initially chosen for this study, three mutants with comparable levels of attenuation elicited higher Salmonella-specific serum immunoglobulin G (IgG) and/or mucosal secretory-IgA antibody titers than the aroA vaccine strain. The three mutants, CL288, CL401, and CL554, also elicited a better protective immune response than the aroA control strain, after a single oral dose of 1 x 109 to 2 x 109 bacteria.

    Original languageEnglish (US)
    Pages (from-to)3378-3383
    Number of pages6
    JournalInfection and Immunity
    Issue number7
    StatePublished - Jul 1 1998


    ASJC Scopus subject areas

    • Parasitology
    • Microbiology
    • Immunology
    • Infectious Diseases

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