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    Group B streptococcal septicemia of the newborn

    Group B strep; GBS

    Group B streptococcal septicemia is a severe bacterial infection that affects newborn infants.

    See also: Neonatal sepsis

    Causes

    Septicemia is an infection in the bloodstream that may travel to different body organs. Group B streptococcal septicemia is caused by the bacterium Streptococcus agalactiae, which is commonly called "group B strep" or GBS. A newborn with septicemia is very sick.

    GBS is commonly found in adults and older children, where it does not usually cause infection. There are two ways in which it may be passed to a newborn baby:

    • The infant can become infected as he or she passes through the birth canal. In this case, babies become ill between birth and 6 days of life (most often in the first 24 hours). This is called "early-onset" GBS disease.
    • The infant may also become infected after delivery by coming into contact with people who carry the GBS germ. In this case symptoms appear later, when the baby is 7 days to 3 months or more old. This is called "late-onset" GBS disease.

    GBS now occurs less often, because now there are methods to screen and treat pregnant women at risk.

    The following increase an infant's risk for group B streptococcal septicemia:

    • Being born more than 3 weeks before the due date (prematurity), especially if the mother goes into labor early (preterm labor)
    • Mother who has already given birth to a baby with GBS sepsis
    • Mother who has a fever (over 100.4 degrees F) during labor
    • Mother who has group B streptococcus in her gastrointestinal, reproductive, or urinary tract
    • Rupture of membranes ("water breaks") more than 18 hours before the baby is delivered
    • Use of intrauterine fetal monitoring ("scalp lead") during labor

    Symptoms

    • Anxious or stressed appearance
    • Blue appearance (cyanosis)
    • Breathing difficulties such as:
      • Flaring of the nostrils
      • Grunting noises
      • Rapid breathing
      • Short periods without breathing
    • Irregular or abnormal heart rate - may be fast or very slow
    • Lethargy
    • Pale appearance (pallor) with cold skin
    • Poor feeding
    • Unstable body temperature (low or high)

    Exams and Tests

    To diagnose GBS septicemia, GBS bacteria must be found in a sample of blood (blood culture) taken from a sick newborn.

    Other tests that may be done include:

    • Blood clotting tests - prothrombin time (PT) and partial thromboplastin time (PTT)
    • Blood gases (to see if the baby needs help with breathing)
    • Complete blood count
    • CSF culture (to check for meningitis)
    • Urine culture
    • X-ray of the chest

    Treatment

    Treatment may involve one or more of the following:

    • Antibiotics given through a vein
    • Breathing help (respiratory support)
    • Fluids given through a vein
    • Medicines to reverse shock
    • Medicines or procedures to correct blood clotting problems
    • Oxygen therapy

    A therapy called extracorporeal membrane oxygenation (ECMO) may be used in very severe cases.

    Outlook (Prognosis)

    This disease can belife threateningwithout prompt treatment.

    Possible Complications

    Possible complications include:

    • Disseminated intravascular coagulation (DIC) -- a serious disorder in which the proteins that control blood clotting are abnormally active
    • Hypoglycemia -- low blood sugar
    • Meningitis -- swelling (inflammation) of the membranes covering the brain and spinal cord caused by infection
    • Respiratory failure -- breathing stops

    When to Contact a Medical Professional

    This disease is usually diagnosed shortly after birth, often while the baby is still in the hospital.

    However, if you have a newborn at home who shows symptoms of this condition, seek immediate emergency medical help or call the local emergency number (such as 911).

    Parents should watch for symptoms in their baby's first 6 weeks. The early stages of this disease can producesymptoms that are hard to spot.

    Prevention

    To help reduce the risk of Group B streptococcal septicemia, the American Academy of Pediatrics, American College of Obstetricians and Gynecologists, and U.S. Centers for Disease Control and Prevention recommend that pregnant womenget tested for group B streptococcus at 35 - 37 weeks into their pregnancy. If the bacteria are detected, women are given antibiotics through a vein during labor. If the mother goes into premature labor before 35 weeks, she should be tested for GBS.

    Newborns who are at high risk are tested for GBS infection. They may receive antibiotics through a vein during the first 48 hours of life until blood culture results are available.

    In all cases, proper hand washing by nursery caretakers, visitors, and parents can help prevent the spread of the bacteria after the infant is born.

    An early diagnosis can help decrease the risk of some complications.

    References

    Verani JR, McGee L, Schrage SJ. Prevention of perinatal group B streptococcal disease: revised guidelines from the Centers for Disease Control 2010. Morbidity and Mortality Weekly Report. 59 (RR-10): 1–35, 2010 (Nov. 19).

    American Academy of Pediatrics Committee on Infectious Diseases. Group B streptococcal infections, in Section 3:Summaries of infectious diseases. Red Book 2009.

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                Tests for Group B streptococcal septicemia of the newborn

                  Review Date: 11/14/2011

                  Reviewed By: Kimberly G. Lee, MD, MSc, IBCLC, Associate Professor of Pediatrics, Division of Neonatology, Medical University of South Carolina, Charleston, SC. Review Provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

                  The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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