Abstract

Introduction: Preterm births accounts for about 11.1 % of births worldwide. Infection accounts for 20% – 40% of these cases and Bacterial vaginosis has been found in 15 % of preterm labor group.
 Objective: To find the prevalence of Bacterial vaginosis among the cases who presented with preterm labour and to determine its maternal and neonatal outcome.
 Methodology: A prospective cross- sectional analytical study on 100 preterm labour cases conducted over a year in the obstetric ward in Manipal Teaching Hospital. Three high vaginal swabs from posterior fornix were taken and tested in Microbiology laboratory. The maternal and neonatal outcome of women with preterm labour due to bacterial vaginosis were noted. The data were analyzed using SPSS 21. Chi2 test was used for comparing maternal and neonatal complications positive or negative with Bacterial Vaginosis.
 Results: In the study period, 584 women had preterm deliveries. The total deliveries during that period was 2,531. The prevalence of Bacterial vaginosis in PTB was found to be 17 %.The accuracy of Gram stain was found to be 90% (sensitivity-57%, specificity-92%, PPV-36%, NPV-96%). The accuracy of wet mount was 90 % (sensitivity-42.85%, specificity-93.5%, PPV-33.3%, NPV95.6%). There were increased cases of chorioamnionitis among women who were BV positive (p-value=0.02). Newborn born to women with BV positive had increased chance of poor Apgar score at 5 minutes (p-value <0.05).
 Conclusion: Maternal and neonatal complications were more common in women with preterm labour associated with Bacterial Vaginosis. Gram stain and wet mount are fairly accurate and can be used as an adjunct to culture for the diagnosis of Bacterial Vaginosis.

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