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  • Title: Evaluation of the specificity of pneumococcal polysaccharide enzyme-linked immunosorbent assay and the effect of serum adsorption based on standard pneumococcal serogroup- or serotype-specific rabbit antisera.
    Author: Slotved HC, Guttmann C, Pedersen CD, Jacobsen JN, Krogfelt KA.
    Journal: Clin Vaccine Immunol; 2009 Sep; 16(9):1279-84. PubMed ID: 19587149.
    Abstract:
    Worldwide, Streptococcus pneumoniae (pneumococcus) is a major cause of morbidity and mortality, especially in infants and elderly people. Pneumococcal capsular polysaccharides are well characterized, and more than 90 different serotypes have been identified. Serotype-specific antibodies against the capsular polysaccharide are produced during infection. Detection of antibodies against pneumococci by enzyme-linked immunosorbent assay (ELISA) is performed according to WHO guidelines, using antigens provided by ATCC. However, testing the ELISA for specificity is challenging due to the difficulty in obtaining human naïve serum with pneumococcal antibodies as well as human serum with antibodies against a single serotype. The application of well-defined serotype-specific sera produced in animals to evaluate the specificity of the ATCC antigens and the effect of adsorption with cell wall and 22F polysaccharides has not been performed before, to our knowledge. In this study, the specificity of ATCC antigens (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) was tested by using commercial serotype-, serogroup-, and pool-specific pneumococcal rabbit antisera.
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