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  • Title: Selective intrapartum anti-bioprophylaxy of group B streptococci infection of neonates: a prospective study in 2454 subsequent deliveries.
    Author: Poulain P, Betremieux P, Donnio PY, Proudhon JF, Karege G, Giraud JR.
    Journal: Eur J Obstet Gynecol Reprod Biol; 1997 Apr; 72(2):137-40. PubMed ID: 9134391.
    Abstract:
    OBJECTIVE: To investigate the efficacy of a selective intrapartum prophylaxy of group B streptococci (GBS) infection of the neonates. STUDY DESIGN: A prospective protocol of universal antepartum screening of GBS and selective intrapartum treatment from the 1st February 1994 to the 31st December 1995, on 2454 subsequent deliveries was designed. Our policy included: (1) antepartum screening as soon as possible after 28 weeks by a single vaginal and perianal sample for culture; (2) intrapartum recognition of one condition of high risk of fetal contamination during labor (these conditions included: a temperature of 38 degrees C during labor, rupture of membranes for more than 12 h or prolonged labor for more than 12 h with rupture of membranes, prematurity, twins, maternal diabetes, previous pregnancy with GBS infection of the neonate); and (3) intrapartum anti-bioprophylaxy (amoxicillin) for women with positive screening during pregnancy and one condition of high risk of fetal contamination during labor. We studied the outcome of neonates during this period to look for immediate GBS severe infection of the neonates in the form of bacteraemia or meningitis and compared the results with the rate of neonatal infection before this protocol (4.5/1000 live births in 1993). RESULTS: We noted that 11% of pregnant women were carriers, 25% of which led to antibiotic chemoprophylaxis during the labor. We noticed four cases of neonatal bacteraemia of GBS. One case arose from the group of carriers (but no condition of risk of fetal contamination during the labor and no chemoprophylaxy). The three other cases were from women with a negative antepartum screening. There was no case of meningitis and all four babies were in good health at day 10 of life. Comparing with results prior to the study, we noticed that the rate of neonatal bacteraemia dropped from 4.5 to 1.6 per 1000 livebirths (P < 0.0001). CONCLUSION: This protocol of intrapartum anti-bioprophylaxy significantly decreases the rate of GBS neonatal sepsis. We propose to improve the efficacy of this prevention program, especially with regard to the method of antepartum screening of pregnant women colonized with GBS.
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