Comparison of three serological assays to measure antibody response to Chlamydia antigen Pgp3 in adolescent and young adults with pelvic inflammatory disease

Abstract

Antibody-based epidemiologic surveillance to determine population-level exposure to sexually transmitted infections could help inform public health fertility preservation strategies. We compared the performance of three platforms to detect antibodies against the Chlamydia trachomatis (CT) antigen Pgp3 – multiplex bead array (MBA), enzyme-linked immunosorbent assay (ELISA), and lateral flow assay (LFA) – on sera from adolescents and young adults (AYAs) with pelvic inflammatory disease (PID). Ninety-five of 118 AYAs diagnosed with PID (80.5%) had positive antibody response to Pgp3 antigen by at least one test, and 78 (66.1%) tested positive by all three tests. Among 27 individuals with infection detected using nucleic acid amplification testing, 92.6% were positive by MBA (25/27), 77.8% (21/27) were positive by ELISA, and 74.1% (20/27) were positive by LFA. These data suggest that the MBA was the most sensitive of the three tests and could be useful in seroepidemiologic studies designed to assess population-level exposure to CT.

Keywords

women screening

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