Spontaneous early preterm labour associated with abnormal genital bacterial colonization

Area of Science:

• Obstetrics and Gynecology
• Microbiology
• Neonatal Health

Background:

• Preterm labor remains a leading cause of neonatal morbidity and mortality.
• The role of intrauterine infection in idiopathic preterm labor is not fully understood.
• Comprehensive analysis of genital microbial flora is needed.

Purpose of the Study:

• To investigate the association between genital microbial flora and spontaneous preterm labor.
• To determine the prevalence of specific microorganisms and chorioamnionitis in women with preterm labor.
• To explore the link between infection and preterm birth outcomes.

Main Methods:

• Studied genital microbial flora (mycoplasmas, chlamydiae, ureaplasmas, anaerobes) in 72 women with spontaneous preterm labor (26-34 weeks gestation).
• Compared microbial flora and chorioamnionitis rates with 26 control subjects undergoing elective cesarean section.
• Assessed subsequent neonatal infection rates.

Main Results:

• Abnormal bacterial colonization was significantly more frequent in the preterm labor group.
• Ureaplasmas, heavy mycoplasma growth, and chorioamnionitis were also significantly higher in the study group.
• Infection appeared to be a consequence, not a cause, of ruptured membranes.

Conclusions:

• A significant proportion of idiopathic preterm labor is associated with genital tract infections.
• Identifying infection is crucial for better prediction and prevention of preterm birth.
• Tocolytic use should be guided by the presence or absence of infection; criteria for bacterial colonization are proposed.