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April 27, 2026International MicrobiologyOpen Access

Temporal trends in Group B Streptococcus colonization, serotype distribution, and antimicrobial resistance among pregnant women in the Brazilian Amazon across the COVID-19 pandemic, 2018–2023

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Authors

ACAnjo Gabriel CarvalhoMBMayra Gyovana Leite BelémESErilene de Lima Sinos

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Overview

Randomized trial evaluated GBS colonization and resistance in pregnant women, suggesting significant changes during the COVID-19 pandemic.

Key Points

  • This study aims to evaluate changes in Group B Streptococcus colonization, serotypes, and antimicrobial resistance among pregnant women during the COVID-19 pandemic.
  • Evaluated rectovaginal samples from 1,449 pregnant women at 35–37 weeks of gestation in Porto Velho, Brazil.
  • Conducted capsular serotyping and antimicrobial susceptibility tests using standardized methods.
  • Compared data across pre-pandemic, pandemic, and post-pandemic periods.
  • GBS colonization was observed in 20.7% of participants, with slight variation across periods: 22.6% pre-pandemic, 21% during, and 19% post-pandemic.
  • Serotype Ia was the most prevalent (39%), and non-susceptibility increased for macrolides and levofloxacin, with MDR isolates rising from 5.7% to 15.9% post-pandemic.
  • All isolates remained susceptible to β-lactam antibiotics (penicillin, ampicillin, cefazolin, vancomycin).

Cite This Study

Carvalho et al. (2026) studied this question.

synapsesocial.com/papers/69eefcf4fede9185760d3b2dhttps://doi.org/10.1007/s10123-026-00832-1
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Group B streptococcus colonization in pregnancy and neonatal outcomes: a three-year monocentric retrospective study during and after the COVID-19 pandemic2024
  2. 2Group B Streptococcus colonization, antibiotic resistance, and maternal-neonatal outcomes in late pregnancy: a retrospective study from 2017 to 20242026
  3. 3High prevalence of penicillin-resistant group B Streptococcus among pregnant women in Northwest Ethiopia2025 · 3 citations
  4. 4Group B streptococcus colonization in pregnancy and neonatal outcomes: a three-year monocentric retrospective study during and after the COVID-19 pandemic2024 · 9 citations
  5. 5Population structure of human Group B Streptococcus in Brazil: vaccine targets, sequence types, and antimicrobial resistance markers2026