- Parents Home
- Allergy Center
- Asthma Center
- Cancer Center
- Diabetes Center
- A to Z
- Emotions & Behavior
- First Aid & Safety
- Food Allergy Center
- General Health
- Growth & Development
- Flu Center
- Heart Health
- Helping With Homework
- Diseases & Conditions
- Nutrition & Fitness Center
- Play & Learn Center
- School & Family Life
- Pregnancy & Newborn Center
- Sports Medicine Center
- Doctors & Hospitals
- Para Padres
- Kids Home
- Asthma Center for Kids
- Cancer Center for Kids
- Movies & More
- Diabetes Center for Kids
- Getting Help
- Puberty & Growing Up
- Health Problems of Grown-Ups
- Health Problems
- Homework Center
- How the Body Works
- Illnesses & Injuries
- Nutrition & Fitness Center for Kids
- Recipes & Cooking for Kids
- Staying Healthy
- Stay Safe Center
- Relax & Unwind Center
- Q&A for Kids
- The Heart
- Videos for Kids
- Staying Safe
- Kids' Medical Dictionary
- Para Niños
- Teens Home
- Asthma Center for Teens
- Be Your Best Self
- Cancer Center for Teens
- Diabetes Center for Teens
- Diseases & Conditions (for Teens)
- Drugs & Alcohol
- Expert Answers (Q&A)
- Flu Center for Teens
- Homework Help for Teens
- Infections (for Teens)
- Managing Your Medical Care
- Managing Your Weight
- Nutrition & Fitness Center for Teens
- Recipes for Teens
- Safety & First Aid
- School & Work
- Sexual Health
- Sports Center
- Stress & Coping Center
- Videos for Teens
- Para Adolescentes
Group B Strep and Pregnancy
What Is Group B Strep?
Group B Streptococcus (group B strep, GBS) is a type of often found in the urinary tract, digestive system, and reproductive tracts. The bacteria come and go from our bodies, so most people who have it don't know that they do. GBS usually doesn't cause health problems.
What Problems Can Group B Strep Cause?
Health problems from GBS are not common. But it can cause illness in some people, such as the elderly and those with some medical conditions. GBS can cause infections in such areas of the body as the blood, lungs, skin, or bones.
About 1 out of every 4 women have GBS. In pregnant women, GBS can cause infection of the urinary tract, placenta, womb, and amniotic fluid.
Even if they haven't had any symptoms of infection, pregnant women can pass the infection to their babies during labor and delivery.
How Does Group B Strep Affect Babies?
When women with GBS are treated with antibiotics during labor, most of their babies do not have any problems. But some babies can become very sick from GBS. Premature babies are more likely to be infected with GBS than full-term babies because their bodies and immune systems are less developed.
The two types of GBS disease in babies are:
- Early-onset infections, which happen during the first week of life. Babies often have symptoms within 24 hours of birth.
- Late-onset infections, which develop weeks to months after birth. This type of GBS disease is not well understood.
What Are the Signs & Symptoms of GBS Disease?
Newborns and infants with GBS disease might show these signs:
- a fever
- feeding problems
- breathing problems
- irritability or fussiness
- inactivity or limpness
- trouble keeping a healthy body temperature
Babies with GBS disease can develop serious problems, such as:
- meningitis (infection of the fluid and lining around the brain). Meningitis is more common with late-onset GBS disease and, in some cases, can lead to hearing loss, vision loss, learning disabilities, seizures, and even death.
How Is Group B Strep Diagnosed?
Pregnant women are routinely tested for GBS late in the pregnancy, usually between weeks 35 and 37. The test is simple, inexpensive, and painless. Called a culture, it involves using a large cotton swab to collect samples from the vagina and rectum. These samples are tested in a lab to check for GBS. The results are usually available in 1 to 3 days.
If a test finds GBS, the woman is said to be "GBS-positive." This means only that she has the bacteria in her body — not that she or her baby will become sick from it.
GBS infection in babies is diagnosed by testing a sample of blood or spinal fluid. But not all babies born to GBS-positive mothers need testing. Most healthy babies are simply watched to see if they have signs of infection.
How Is Group B Strep Treated?
Doctors will test a pregnant woman to see if she has GBS. If she does, she will get intravenous (IV) antibiotics during labor to kill the bacteria. Doctors usually use penicillin, but can give other medicines if a woman is allergic to it.
It's best for a woman to get antibiotics for at least 4 hours before delivery. This simple step greatly helps to prevent the spread of GBS to the baby.
Doctors also might give antibiotics during labor to a pregnant woman if she:
- goes into labor prematurely, before being tested for GBS
- hasn't been tested for GBS and her water breaks 18 or more hours before delivery
- hasn't been tested for GBS and has a fever during labor
- had a GBS bladder infection during the pregnancy
- had a baby before with GBS disease
Giving antibiotics during labor helps to prevent early-onset GBS disease only. The cause of late-onset disease isn't known, so no method has yet been found to prevent it. Researchers are working to develop a vaccine to prevent GBS infection.
Babies who get GBS disease are treated with antibiotics. These are started as soon as possible to help prevent problems. These babies also may need other treatments, like breathing help and IV fluids.
How Can I Help Prevent Group B Strep Infection?
Because GBS comes and goes from the body, a woman should be tested for it during each pregnancy. Women who are GBS-positive and get antibiotics at the right time during labor do well, and most don't pass the infection to their babies.
If you are GBS-positive and begin to go into labor, go to the hospital rather than laboring at home. By getting IV antibiotics for at least 4 hours before delivery, you can help protect your baby against early-onset GBS disease.
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995- The Nemours Foundation. KidsHealth® is a registered trademark of The Nemours Foundation. All rights reserved.
Images sourced by The Nemours Foundation and Getty Images.