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1.1.1.341
medicine
insertion of the gene rfbJ encoding abequose synthase into a suicide vector and integration into the rfb clusters of wild-type Salmonella typhi Vi-positive strain ISP 1820, Salmonella typhi Vi-negative strain H400, and a double aro mutant of Salmonella typhi ISP 1820, strain CVD 906. Strains carrying the vector express the O4 antigen in place of the O9 antigen in the lipopolysaccharide molecule. Results support the hypothesis that the chemical composition of the Salmonella 0-antigen influences the interaction of individual serotypes with complement
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720485
1.1.1.341
analysis
selection and use of primers to target defined regions of the abequose and paratose synthase genes responsible for biosynthesis of the oligosaccharide repeating units of the 0-antigenic lipopolysaccharide, in order to differentiate Salmonella serogroups. In a polymerase chain reaction assay utilizing these rjb-specific primers, all of the 40 salmonellae belonging to serogroups B, C2, and D plus A could accurately be identified among a total of 123 clinical isolates tested. No false-positive reactions were detected
720107
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