alexa Possible association between amniotic fluid micro-organism infection and microflora in the mouth.
Surgery

Surgery

Tropical Medicine & Surgery

Author(s): Bearfield C, Davenport ES, Sivapathasundaram V, Allaker RP

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Abstract OBJECTIVE: To determine whether oral bacteria are found in the amniotic cavity. DESIGN: Laboratory based analysis of clinical samples. SETTING: Royal London Hospital, Whitechapel. POPULATION: Forty-eight women attending for elective caesarean section. METHODS: Dental plaque, a high vaginal swab, amniotic fluid and chorioamnion tissue were taken from women with intact membranes. MAIN OUTCOME MEASURES: Samples were investigated using culture and microscopy for the presence of microorganisms. Amniotic fluid was analysed by polymerase chain reaction (PCR) for the presence of the ubiquitous 16S rRNA gene specific to most eubacteria. Samples were analysed using PCR genus and species specific primers directed to bacterial taxa found as part of the normal oral microflora (Streptococcus spp. and Fusobacterium nucleatum). Levels of prostaglandin E2 and cytokines were measured in amniotic fluid. RESULTS: Amniotic fluid was positive for universal bacteria PCR, Streptococcus spp. PCR and F. nucleatum PCR in 34/48, 20/48 and 7/48 of cases, respectively. Streptococcus spp. and F. nucleatum were cultured from the dental plaque, vagina and amniotic fluid of 48/48, 14/48, 0/48 and 29/48, 6/48, 0/48 subjects, respectively. A significant association was found between detection of microbial DNA (universal and F. nucletum) and complications in previous pregnancies including miscarriage, intrauterine death, neonatal death, preterm delivery and premature rupture of membranes (P < 0.05 and P < 0.01, respectively). Prostaglandin E2 and cytokine levels, with the exception of IL-1alpha, were not significantly different between women with and without evidence of infection. CONCLUSIONS: The results indicate that Streptococcus spp. and F. nucleatum in the amniotic fluid may have an oral origin.
This article was published in BJOG and referenced in Tropical Medicine & Surgery

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