Simultaneous Detection of Haemophilus influenzae Type b Polysaccharide-Specific Antibodies and Neisseria meningitidis Serogroup A, C, Y, and W-135 Polysaccharide-Specific Antibodies in a Fluorescent-Bead-Based Multiplex Immunoassay

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Abstract
We expanded the meningococcal serogroup A, C, Y, and W-135 multiplex immunoassay (MIA) to simultaneously detect immunoglobulin type G antibodies directed toward Haemophilus influenzae type b polysaccharide (HibPS). The monoplex HibPS assay was compared to a HibPS-specific competitive enzyme-linked immunosorbent assay and showed a good correlation ( R = 0.96). Furthermore, no cross-reactivity between HibPS and the four meningococcal serogroups was detected. This pentaplex meningococcal Hib MIA is a useful tool to investigate serological responses toward different childhood PS vaccines.

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