101. Prospective observational study of vaginal microbiota pre- and post-rescue cervical cerclage.
- Author
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Brown, RG, Chan, D, Terzidou, V, Lee, YS, Smith, A, Marchesi, JR, MacIntyre, DA, Bennett, PR, Brown, R G, Lee, Y S, Marchesi, J R, MacIntyre, D A, and Bennett, P R
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BACTERIAL vaginitis , *CERVICAL cerclage , *FISHER discriminant analysis , *LONGITUDINAL method , *FETAL membranes , *HOSPITAL admission & discharge , *COMPARATIVE studies , *PREMATURE infants , *LABOR (Obstetrics) , *LACTOBACILLUS , *RESEARCH methodology , *EVALUATION of medical care , *MEDICAL cooperation , *MISCARRIAGE , *PERINATAL death , *PREGNANCY , *RESEARCH , *RESEARCH funding , *UTERINE cervix incompetence , *VAGINA , *EVALUATION research , *GARDNERELLA - Abstract
Objective: To investigate the relation between vaginal microbiota composition and outcome of rescue cervical cerclage.Design: Prospective observational study.Setting: Queen Charlotte's and Chelsea Hospital, London.Population: Twenty singleton pregnancies undergoing a rescue cervical cerclage.Methods: Vaginal microbiota composition was analysed in women presenting with a dilated cervix and exposed fetal membranes before and 10 days following rescue cervical cerclage and was correlated with clinical outcomes.Main Outcome Measures: Composition of vaginal bacteria was characterised by culture-independent next generation sequencing. Successful cerclage was defined as that resulting in the birth of a neonate discharged from hospital without morbidity. Unsuccessful cerclage was defined as procedures culminating in miscarriage, intrauterine death, neonatal death or significant neonatal morbidity.Results: Reduced Lactobacillus spp. relative abundance was observed in 40% of cases prior to rescue cerclage compared with 10% of gestation age-matched controls (8/20, 40% versus 3/30, 10%, P = 0.017). Gardnerella vaginalis was over-represented in women presenting with symptoms (3/7, 43% versus 0/13, 0%, P = 0.03, linear discriminant analysis, LDA (log 10) and cases culminating in miscarriage (3/6, 50% versus 0/14, 0%, P = 0.017). In the majority of cases (10/14, 71%) bacterial composition was unchanged following cerclage insertion and perioperative interventions.Conclusions: Reduced relative abundance of Lactobacillus spp. is associated with premature cervical dilation, whereas high levels of G. vaginalis are associated with unsuccessful rescue cerclage cases. The insertion of a rescue cerclage does not affect the underlying bacterial composition in the majority of cases.Tweetable Abstract: Preterm cervical dilatation associates with reduced Lactobacillus spp. Presence of Gardnerella vaginalis predicts rescue cerclage failure. [ABSTRACT FROM AUTHOR]- Published
- 2019
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