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Type-specific streptococcal antibodies in amniotic fluid.

B M Gray, J D Springfield, H C Dillon

    American Journal of Obstetrics and Gynecology
    |March 1, 1987
    PubMed
    Summary
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    Antibodies against group B streptococcus and pneumococcus are low in amniotic fluid during mid-pregnancy. This suggests a limited role for these antibodies in protecting against intrauterine infections in healthy pregnancies.

    Area of Science:

    • Immunology
    • Maternal-Fetal Medicine
    • Microbiology

    Background:

    • Intrauterine infections pose risks during pregnancy.
    • Group B Streptococcus (GBS) and Streptococcus pneumoniae are significant pathogens.
    • The role of maternal antibodies in protecting the intrauterine environment is not fully understood.

    Purpose of the Study:

    • To quantify type-specific antibodies against GBS and pneumococcal capsular antigens in amniotic fluid.
    • To assess the potential protective role of these antibodies against intrauterine infections.

    Main Methods:

    • Analysis of 68 amniotic fluid samples from healthy pregnant women (16-20 weeks gestation).
    • Measurement of type-specific antibodies against GBS and pneumococcal capsular antigens.

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    Main Results:

    • Mean antibody levels ranged from 0.13 to 0.61 microgram/ml.
    • Few samples exhibited antibody levels exceeding 1 microgram/ml for any tested antigen.

    Conclusions:

    • Amniotic fluid antibody levels against GBS and pneumococcal antigens are generally low during mid-pregnancy.
    • The findings suggest a potentially limited contribution of these specific antibodies to protection against intrauterine infections in healthy pregnancies.