학술논문
Comparison of platforms for testing antibodies to Chlamydia trachomatis antigens in the Democratic Republic of the Congo and Togo.
Document Type
Article
Author
Gwyn, Sarah; Awoussi, Marcel S.; Bakhtiari, Ana; Bronzan, Rachel N.; Crowley, Kathryn; Harding-Esch, Emma M.; Kassankogno, Yao; Kilangalanga, Janvier N.; Makangila, Felix; Mupoyi, Sylvain; Ngondi, Jeremiah; Ngoyi, Bonaventure; Palmer, Stephanie; Randall, Jessica M.; Seim, Anders; Solomon, Anthony W.; Stewart, Raymond; Togbey, Kwamy; Uvon, Pitchouna A.; Martin, Diana L.
Source
Subject
*IMMUNOGLOBULINS
*CHLAMYDIA trachomatis
*BACTERIAL antigens
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Language
ISSN
2045-2322
Abstract
Trachoma, caused by repeated ocular infection with Chlamydia trachomatis (Ct), is targeted for elimination as a public health problem. Serological testing for antibodies is promising for surveillance; determining useful thresholds will require collection of serological data from settings with different prevalence of the indicator trachomatous inflammation—follicular (TF). Dried blood spots were collected during trachoma mapping in two districts each of Togo and Democratic Republic of the Congo. Anti-Ct antibodies were detected by multiplex bead assay (MBA) and three different lateral flow assays (LFA) and seroprevalence and seroconversion rate (SCR) were determined. By most tests, the district with > 5% TF (the elimination threshold) had five–sixfold higher seroprevalence and tenfold higher SCR than districts with < 5% TF. The agreement between LFA and MBA was improved using a black latex developing reagent. These data show optimization of antibody tests against Ct to better differentiate districts above or below trachoma elimination thresholds. [ABSTRACT FROM AUTHOR]