Risk factors associated with infection following cesarean section

Area of Science:

• Obstetrics and Gynecology
• Infectious Disease Epidemiology

Background:

• Postoperative febrile morbidity, particularly endometritis, is a significant concern following childbirth.
• Cesarean delivery is associated with higher infection rates compared to vaginal delivery.

Purpose of the Study:

• To identify risk factors for postoperative febrile morbidity, specifically endometritis.
• To analyze infection rates across different delivery types: vaginal, elective repeat cesarean, nonurgent primary cesarean, and emergency cesarean.

Main Methods:

• Retrospective study utilizing multivariant discriminant analysis.
• Analysis of data from 496 deliveries (250 vaginal, 246 cesarean sections).

Main Results:

• Endometritis infection rates varied significantly: vaginal (3.6%), elective repeat cesarean (6.0%), nonurgent primary cesarean (22.2%), and emergency cesarean (38.4%).
• No patient-related risk factors identified for elective repeat cesarean; Staphylococcus aureus was the most frequent isolate.
• Four significant risk factors for endometritis after primary cesarean: labor duration, number of preoperative vaginal exams, time membranes were ruptured, and postoperative anemia.
• Internal fetal monitoring was not identified as a risk factor.

Conclusions:

• Emergency cesarean sections carry the highest risk of endometritis.
• Specific factors during labor and postpartum increase endometritis risk after primary cesarean sections.
• Findings have implications for prophylactic antibiotic strategies and reducing postoperative morbidity.