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Capsular Serotyping of Streptococcus pneumoniae Using the Quellung Reaction
04:25

Capsular Serotyping of Streptococcus pneumoniae Using the Quellung Reaction

Published on: February 24, 2014

[Antibodies to Streptococcus pneumoniae antigens in newborn infants]

M A Ulanova, M Kh Sharapova, Z M Mikhaĭlova

    Zhurnal Mikrobiologii, Epidemiologii I Immunobiologii
    |July 1, 1990
    PubMed

    Insights

    Maternal antibodies to pneumococci transfer to newborns, offering protection. Breast milk, particularly IgA, provides further defense against pneumococcal infections in infants.

    Area of Science:

    • Immunology
    • Neonatal Health
    • Microbiology

    Background:

    • Pneumococcal infections pose a significant threat to infants.
    • Understanding passive immunity transfer is crucial for infant health.
    • Maternal antibodies play a key role in neonatal protection.

    Purpose of the Study:

    • To quantify antibody levels against pneumococcal antigens in newborns and mothers.
    • To investigate the transplacental transfer of antipneumococcal antibodies.
    • To assess the presence of antipneumococcal antibodies in breast milk.

    Main Methods:

    • Enzyme immunoassay (EIA) was used to measure antibody levels.
    • Blood sera from 38 newborns and their mothers were analyzed.
    • Colostrum and milk samples from 48 nursing mothers were also studied.

    Main Results:

    • Transplacental transfer of antipneumococcal antibodies from mother to fetus was confirmed.
    • Newborn antibody levels were generally lower than maternal levels but higher than in older infants.
    • Significant levels of IgA antibodies to pneumococci were found in breast milk.

    Conclusions:

    • Passive immunity via transplacental transfer provides early protection to newborns against pneumococcal disease.
    • Maternal IgA antibodies in breast milk may offer an additional protective mechanism for infants.
    • These findings highlight the importance of maternal antibody status for infant pneumococcal immunity.

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