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Torquetenovirus Titer in Vaginal Secretions from Pregnant and Postpartum Women: Association with Absence of Lactobacillus crispatus and Levels of Lactic Acid and Matrix Metalloproteinase-8.

Reprod Sci. 2020 Nov;27(11):2075-2081. Epub 2020 Sep 17
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摘要


Vaginal samples from women with term deliveries were tested for torquetenovirus (TTV) by gene amplification, matrix metalloproteinase (MMP)-8 and D- and L-lactic acid by ELISA, and microbiome composition by analysis of the bacterial 16S ribosomal RNA gene. TTV was detected in 43.2%, 31.5%, and 41.4% of first trimester, third trimester, and postpartum samples, respectively. The viral titer was higher in postpartum than in the first (p = 0.0018) or third (p = 0.0013) trimester. The mean gestational age at delivery was lower in women positive for TTV in their first trimester (p = 0.0358). In the first and third trimester, the MMP-8 level was higher if TTV was also present (p < 0.0091). The D-lactic acid level was lower in first trimester samples if TTV was present (p = 0.0334). Lactobacillus crispatus dominance in first and third trimester samples was higher when TTV was absent (p < 0.0033). We conclude that TTV is present in the vagina in many women with normal pregnancy outcomes and that its occurrence is associated with a lack of L. crispatus dominance, an increase in vaginal MMP-8 and a decrease in D-lactic acid.

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