Skip to main content
Supplement Research and Comparison WebsiteBest Price GuaranteeAbout Us
Supplement Research and Comparison Website

Rectal and Vaginal Eradication of Streptococcus agalactiae (GBS) in Pregnant Women by Using Lactobacillus salivarius CECT 9145, A Target-specific Probiotic Strain

  • 2019-04-10
  • Nutrients 11(4)
    • V. Martín
    • Nívia Cárdenas
    • S. Ocaña
    • M. Marín
    • Rebeca Arroyo
    • David Beltrán
    • C. Badiola
    • L. Fernández
    • J. M. Rodríguez


Streptococcus agalactiae (Group B Streptococci, GBS) can cause severe neonatal sepsis. The recto-vaginal GBS screening of pregnant women and intrapartum antibiotic prophylaxis (IAP) to positive ones is one of the main preventive options. However, such a strategy has some limitations and there is a need for alternative approaches. Initially, the vaginal microbiota of 30 non-pregnant and 24 pregnant women, including the assessment of GBS colonization, was studied. Among the Lactobacillus isolates, 10 Lactobacillus salivarius strains were selected for further characterization. In vitro characterization revealed that L. salivarius CECT 9145 was the best candidate for GBS eradication. Its efficacy to eradicate GBS from the intestinal and vaginal tracts of pregnant women was evaluated in a pilot trial involving 57 healthy pregnant women. All the volunteers in the probiotic group (n = 25) were GBS-positive and consumed ~9 log10 cfu of L. salivarius CECT 9145 daily from week 26 to week 38. At the end of the trial (week 38), 72% and 68% of the women in this group were GBS-negative in the rectal and vaginal samples, respectively. L. salivarius CECT 9145 seems to be an efficient method to reduce the number of GBS-positive women during pregnancy, decreasing the number of women receiving IAP during delivery.

Keywords: GBS; Lactobacillus salivarius; Streptococcus agalactiae; pregnancy; probiotic.

Research Insights

SupplementHealth OutcomeEffect TypeEffect Size
Streptococcus salivariusReduced GBS ColonizationBeneficial
⬆ Back to top
Unsubscribe anytime. See our Privacy Policy.
Supplement Research and Comparison Website: evidence-based information about supplements, their benefits, potential risks, and their efficacy.

Join Our Community

Statements on this website have not been reviewed by the U.S. Food and Drug Administration. These products are not meant to diagnose, treat, cure, or prevent any disease. The information here is not a replacement for personal medical advice.