Browsing by Author "Brown, Ladraka' T."

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    Immunoglobulin-Based Investigation of Spontaneous Resolution of Chlamydia trachomatis Infection
    (Oxford, 2017-06) Bakshi, Rakesh; Gupta, Kanupriya; Jordan, Stephen J.; Brown, Ladraka' T.; Press, Christen G.; Gorwitz, Rachel J.; Papp, John R.; Morrison, Sandra G.; Lee, Jeannette Y.; Morrison, Richard P.; Geisler, William M.; Medicine, School of Medicine
    Chlamydia trachomatis elementary body enzyme-linked immunosorbent assay (ELISA) was used to investigate serum anti-CT immunoglobulin G1 (IgG1; long-lived response) and immunoglobulin G3 (IgG3; short-lived response indicating more recent infection) from treatment (enrollment) and 6-month follow-up visits in 77 women previously classified as having spontaneous resolution of chlamydia. Of these women, 71.4% were IgG1+IgG3+, consistent with more recent chlamydia resolution. 15.6% were IgG3− at both visits, suggesting absence of recent chlamydia. Using elementary body ELISA, we demonstrated approximately 1 in 6 women classified as having spontaneous resolution of chlamydia might have been exposed to C. trachomatis but not infected. Further, we classified their possible infection stage.
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    Lower Levels of Cervicovaginal Tryptophan are Associated with Natural Clearance of Chlamydia in Women
    (Oxford, 2017-06) Jordan, Stephen J.; Olson, Kristin M.; Barnes, Stephen; Wilson, Landon S.; Berryhill, Taylor F.; Bakshi, Rakesh; Brown, Ladraka' T.; Press, Christen G.; Geisler, William M.; Medicine, School of Medicine
    Chlamydiatrachomatis (Ct) infection causes significant morbidity. In vitro studies demonstrate that Ct growth inhibition occurs by interferon-gamma (IFN-γ)–mediated depletion of intracellular tryptophan, and some Ct strains utilize extracellular indole to restore tryptophan levels. Whether tryptophan levels are associated with Ct infection clearance in humans remains unknown. We evaluated tryptophan, indole, and IFN-γ levels in cervicovaginal lavages from women with either naturally cleared or persisting Ct infection. Women who cleared infection had significantly lower tryptophan levels and trended toward lower IFN-γ levels compared to women with persisting infection. Due to its volatility, indole was not measurable in either group.