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A Murine Model of Group B Streptococcus Vaginal Colonization
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Vaginal co-colonization with multiple Group B Streptococcus serotypes.

Ameneh Khatami1, Tara M Randis1, Larissa Tavares1

  • 1Departments of Pediatrics and Microbiology, New York University School of Medicine, New York, NY, USA.

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|December 12, 2018
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Summary
This summary is machine-generated.

Detecting multiple Group B Streptococcus (GBS) serotypes in vaginal samples is crucial for vaccine development. A new PCR method identified co-colonization in 6.6% of women, highlighting the need for improved GBS surveillance.

Keywords:
Co-colonizationSerotypeStreptococcus agalactiaeVaginal colonization

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Molecular Diagnostics

Background:

  • Group B Streptococcus (GBS) is a significant neonatal pathogen.
  • Maternal GBS colonization is a primary transmission route to newborns.
  • Detecting multiple GBS serotypes simultaneously is challenging with standard methods.

Purpose of the Study:

  • To develop and validate a nested real-time PCR assay for detecting GBS co-colonization.
  • To investigate the prevalence of GBS serotypes and co-colonization in non-pregnant women.

Main Methods:

  • A nested real-time PCR assay was designed.
  • The assay was applied to vaginal samples from 433 non-pregnant women.
  • GBS serotypes were identified using the developed PCR technique.

Main Results:

  • The PCR assay successfully detected GBS co-colonization.
  • 6.6% (6/91) of GBS-positive samples harbored two or more GBS serotypes.
  • Serotype V was over-represented in co-colonized samples.
  • Serotype IV GBS prevalence exceeded 10% in this cohort, higher than previously reported US studies.

Conclusions:

  • Nested real-time PCR is effective for identifying GBS co-colonization.
  • The findings underscore the importance of GBS serotype surveillance, particularly for serotypes IV and V.
  • Understanding co-colonization patterns is vital for informing type-specific GBS vaccination strategies.