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Bacteriological findings after premature rupture of the membranes
C Simon1, H Schröder, D Weisner
1Department of Pediatrics, University Hospital, Kiel, FRG.
Insights
Neonatal infection can occur following premature rupture of the membranes (PROM). Prompt delivery after PROM reduces infection risk in newborns, with specific bacteria identified in infected infants.
Area of Science:
- Neonatal microbiology
- Infectious diseases in pediatrics
- Obstetrics and Gynecology
Background:
- Premature rupture of the membranes (PROM) is a significant risk factor for neonatal infections.
- Understanding the microbial etiology and transmission routes is crucial for preventing infant sepsis.
- The timing of membrane rupture relative to labor onset influences infection risk.
Purpose of the Study:
- To investigate the presence and types of bacteria in neonates born after PROM.
- To determine the correlation between the duration of PROM and neonatal infection rates.
- To identify common bacterial pathogens in neonates with and without PROM but with sepsis risk factors.
Main Methods:
- Cultured placental arterial blood, ear swabs, and meconium from neonates born after PROM.
- Compared bacterial findings in neonates with PROM to a control group with sepsis risk factors.
- Analyzed infection rates based on the interval between membrane rupture and labor onset.
Main Results:
- 26% of infants born after PROM had identical bacteria (E. coli, Bacteroides fragilis, enterococci, group B streptococci) in blood, ear swabs, and meconium.
- Infection rates were 10% for PROM <24 hours and 30% for PROM >24 hours.
- 7% of infants without PROM but with sepsis risk factors showed matching bacteria in blood and meconium, predominantly group B streptococci and E. coli.
Conclusions:
- Neonatal bacterial colonization from placental blood to infant sites is evident after PROM.
- Prolonged membrane rupture significantly increases the risk of neonatal infection.
- Prompt identification and management of bacterial infections in newborns are essential, especially in cases of PROM.
Abstract:
Of 243 children born after premature rupture of the membranes (PROM) 61 (26%) had the same bacteria in placental arterial blood, in ear swabs (taken deep from the external auditory canal) and in meconium. The predominant organisms were E. coli, Bacteroides fragilis, Streptococcus faecalis (enterococci) and Streptococcus agalactiae (group B streptococci). The infection rate was only 10% if the membranes had ruptured within 24 h of the onset of labour and 30% if the interval was longer than 24 h. Of 131 children born without premature rupture of the membranes but with risk factors for sepsis 9 (7%) had a positive blood culture with the same organism in the ear swabs and in meconium. The organisms were Streptococcus agalactiae (6 cases) and E. coli, Streptococcus faecalis and Klebsiella pneumoniae (one case each). Contamination of placental blood cultures was rare.