Have you just found out that you are a carrier of group B streptococcus (GBS)? Don’t panic! This is a common occurrence in late pregnancy, and there are simple measures you can take to protect your baby.
What is Group B Streptococcus?
GBS is a bacterium that is naturally present in the body, particularly in the intestines, vagina, and rectum. Approximately 10 to 30% of women are carriers without knowing it and without symptoms.
Why is this important during pregnancy?
In pregnant women, GBS can be transmitted to the baby during childbirth. It is estimated that 15 to 40% of pregnant women are carriers, and among them, 40 to 70% transmit the bacteria to their newborns.
In rare cases (1 to 2%), this can lead to a serious infection in the baby within hours of birth.
Screening and prevention
A vaginal and anal swab is recommended between 35 and 37 weeks to detect the presence of GBS.
If the test is positive, preventive treatment with antibiotics will be offered during labor, ideally at least 4 hours before delivery. This measure greatly reduces the risk of transmission.
When is treatment started immediately, even without test results?
- If you have previously had a baby infected with GBS.
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If you give birth prematurely and your status is unknown.
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If your membranes have been ruptured for more than 18 hours.
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If you have a fever during labor (≥ 98.6°F).
Antibiotics: well-assessed risks
Like all medications, antibiotics can have side effects. But in this context, the benefits for the baby far outweigh the risks.
In summary: Screening for Group B Streptococcus and administering antibiotics at the right time are safe and effective ways to protect your baby. You have done nothing wrong—and you are in good hands.
Marie Fortier
The baby expert
