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Ampicillin for neonatal group B streptococcal prophylaxis: how rapidly can bactericidal concentrations be achieved?
- Source :
- American journal of obstetrics and gynecology. 175(4 Pt 1)
- Publication Year :
- 1996
-
Abstract
- OBJECTIVE: Our purpose was to determine how rapidly bactericidal concentrations of ampicillin against group B streptococci are achieved in amniotic fluid and cord blood after a 2 gm maternal infusion. STUDY DESIGN: Ampicillin was administered at varying time intervals between 3 and 67 minutes before elective cesarean delivery in 40 women. Samples of amniotic fluid were obtained by amniocentesis just before the uterine incision was made. Umbilical and maternal blood were obtained at the time of delivery. Ampicillin concentrations were measured by high-pressure liquid chromatography. RESULTS: The mean concentrations of ampicillin measured in maternal and umbilical cord sera all exceeded the minimum bactericidal concentrations reported for group B streptococci (0.25 to 2.0 μg/ml) and were achieved as soon as 5 minutes after ampicillin infusion. Similarly, bactericidal levels of ampicillin in the amniotic fluid could be detected as early as 5 minutes. However, such concentrations of ampicillin in the amniotic fluid were achieved in only 85% of the pregnancies studied. CONCLUSIONS: Bactericidal levels of ampicillin against group B streptococci can usually be achieved rapidly in both fetal blood and amniotic fluid after a standard 2 gm intravenous dose given to the mother for neonatal prophylaxis. (Am J Obstet Gynecol 1996;175:974-6.)
- Subjects :
- Amniotic fluid
Time Factors
Penicillins
Umbilical cord
Group B
Infant, Newborn, Diseases
Streptococcus agalactiae
Andrology
Pregnancy
Ampicillin
Streptococcal Infections
Medicine
Humans
Chromatography, High Pressure Liquid
Antibacterial agent
Fetus
medicine.diagnostic_test
business.industry
Cesarean Section
Osmolar Concentration
Infant, Newborn
Obstetrics and Gynecology
Amniotic Fluid
Fetal Blood
medicine.anatomical_structure
Cord blood
Anesthesia
Amniocentesis
Female
business
medicine.drug
Subjects
Details
- ISSN :
- 00029378
- Volume :
- 175
- Issue :
- 4 Pt 1
- Database :
- OpenAIRE
- Journal :
- American journal of obstetrics and gynecology
- Accession number :
- edsair.doi.dedup.....91e8298a97adaef309e8129a28ff8623