期刊
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY
卷 208, 期 3, 页码 -出版社
MOSBY-ELSEVIER
DOI: 10.1016/j.ajog.2013.01.018
关键词
chorioamnionitis; infection; preterm birth
资金
- Eunice Kennedy Shriver National Institute of Child Health and Human Development [5 T32 HD055172-02]
- Washington University Clinical and Translational Science Award [UL1 RR024992]
- Preterm Birth Research Grant from the Burroughs Wellcome Fund
- Washington University Clinical and Translational Science (National Institutes of Health) [UL1 RR024992]
- Children's Discovery Institute of St. Louis Children's Hospital
OBJECTIVE: Bacteria have been identified in different regions of the placenta. Here, we tested the hypothesis that the maternal basal plate of the placenta harbors microbes that may be associated with adverse pregnancy outcomes. STUDY DESIGN: We performed a cross-sectional study of pregnancies from a single tertiary care hospital. Maternal medical and obstetric characteristics were obtained and pregnancies followed up prospectively for outcomes and placental collection. After delivery, systematic random sampling of the placental basal plate was performed. Paraffin sections of basal plates were stained with 4 histologic stains and scored for morphological evidence of bacteria. RESULTS: Of 195 total patients in the study, Gram-positive and - negative intracellular bacteria of diverse morphologies were documented in the basal plates of 27% of all placentas. Of the patients, 35% delivered preterm. No difference was noted between placental basal plates from preterm or term gestations. Intracellular bacteria were found in the placental basal plates of 54% spontaneous preterm deliveries <28 weeks, and in 26% of term spontaneous deliveries (P = .02). Intracellular bacteria were also documented in placentas without clinical or pathologic chorioamnionitis. CONCLUSION: A total of 27% of placentas demonstrated intracellular bacteria in the placental basal plate using morphological techniques. Thus, the maternal basal plate is a possible source of intrauterine colonization and placental pathological examination could include examination for bacteria in this important maternal-fetal interface.
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