Protect Your Baby From Group B Strep During Pregnancy

Can an infection you don't even know you have be harmful to your baby? This scary prospect is a real one for almost one in every 1,000 U.S. newborns infected with Group B streptococcus (GBS). Although GBS is mainly a problem for newborns, it's also a common cause of postpartum uterine infections in women, resulting in fever, abdominal pain, and rapid pulse.

Between 10 and 30 percent of pregnant women have GBS in their vaginal or rectal area; each carries a one in 100 chance that her baby will become infected. Most people who harbor GBS aren't aware of it, because it rarely causes any symptoms. The bacterium lives in the gastrointestinal tract, along with numerous other bacteria that are harmless to most people. However, if GBS is absorbed by baby as he passes through the birth canal — for example, by ingesting vaginal fluids during delivery — it could make him very sick.

Strep in Newborns

There are two forms of GBS infection in infants:

  • Early-onset: About 80 percent of newborn infections are early-onset, and these are almost always transmitted from mother to child during delivery. Babies with early-onset GBS develop symptoms within seven days of birth, usually within the first six hours of life. Early-onset infection could show up in your baby as a form of pneumonia, sepsis (blood infection), or, less commonly, meningitis (infection of the membranes surrounding the brain).
  • Late-onset: Infections in babies seven days to three months old are considered late-onset. These infections are contracted either at delivery or after birth from an outside source, including family members, visitors, or hospital staff who didn't wash their hands thoroughly. Late-onset infection usually takes the form of sepsis or meningitis.

Fortunately, doctors have made progress in preventing early-onset Group B strep infection in newborns. According to a new study by the Centers for Disease Control and Prevention, the number of babies who developed early-onset GBS dropped 65 percent between 1993 and 1998.

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