Total anti-<i>S</i>. Typhimurium and specific anti-<i>S</i>. Typhimurium LPS antibody in sera from HIV-infected and HIV-uninfected adults.

<p>(A) Total anti-<i>S</i>. Typhimurium antibody levels in the different groups of sera (HIV-ve bactericidal, HIV+ve bactericidal and HIV+ve inhibitory) by flow cytometry. (B) Specific anti-<i>S</i>. Typhimurium LPS antibody levels by ELISA. Anti-LPS antibody concentration of the sera were determined using anti-LPS ELISA, where <i>S</i>. Typhimurium LPS was coated onto ELISA plates at 5 μg/ml. Anti-LPS antibodies were detected using alkaline-phosphatase-conjugated anti-human isotype-specific antibodies. Each point represents one serum.