Seroreversion to<i>Chlamydia trachomatis</i>Pgp3 antigen among children in a hyperendemic region of Amhara, Ethiopia

Tedijanto, Christine; Aragie, Solomon; Gwyn, Sarah; Wittberg, Dionna M; Zeru, Tàye; Tadesse, Zerihun; Chernet, Ambahun; Thompson, Isabel A.; Nash, Scott D.; Lietman, Thomas M.; Martin, Diana L.; Keenan, Jeremy D.; Arnold, Benjamin F.

doi:10.1101/2023.02.04.23285360

Cited by 2 publications

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Monitoring transmission intensity of trachoma with serology

et al. 2023

Self Cite

View full text Add to dashboard Cite

Trachoma, caused by ocular Chlamydia trachomatis infection, is targeted for global elimination as a public health problem by 2030. To provide evidence for use of antibodies to monitor C. trachomatis transmission, we collated IgG responses to Pgp3 antigen, PCR positivity, and clinical observations from 19,811 children aged 1–9 years in 14 populations. We demonstrate that age-seroprevalence curves consistently shift along a gradient of transmission intensity: rising steeply in populations with high levels of infection and active trachoma and becoming flat in populations near elimination. Seroprevalence (range: 0–54%) and seroconversion rates (range: 0–15 per 100 person-years) correlate with PCR prevalence (r: 0.87, 95% CI: 0.57, 0.97). A seroprevalence threshold of 13.5% (seroconversion rate 2.75 per 100 person-years) identifies clusters with any PCR-identified infection at high sensitivity ( >90%) and moderate specificity (69–75%). Antibody responses in young children provide a robust, generalizable approach to monitor population progress toward and beyond trachoma elimination.

show abstract

Monitoring transmission intensity of trachoma with serology

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

Monitoring transmission intensity of trachoma with serology

Tedijanto

Solomon

Martin

et al. 2023

Preprint

View full text Add to dashboard Cite

Trachoma, caused by ocular Chlamydia trachomatis infection, is targeted for global elimination as a public health problem by 2030. To provide evidence for use of antibodies to monitor C. trachomatis transmission, we collated IgG responses to Pgp3 antigen, PCR positivity, and clinical observations from 19,811 children aged 1-9 years in 14 populations. We demonstrate that age-seroprevalence curves consistently shift along a gradient of transmission intensity: rising steeply in populations with high levels of infection and active trachoma and becoming flat in populations near elimination. Seroprevalence (range: 0-54%) and seroconversion rates (range: 0-15 per 100 person-years) correlate with PCR prevalence (r: 0.88, 95% CI: 0.77, 0.93). A seroprevalence threshold of 13.5% (seroconversion rate 2.75 per 100 person-years) identifies clusters with any infection at high sensitivity (>90%) and moderate specificity (69-75%). Antibody responses in young children provide a robust, generalizable approach to monitor population progress toward and beyond trachoma elimination.

show abstract

Seroreversion toChlamydia trachomatisPgp3 antigen among children in a hyperendemic region of Amhara, Ethiopia

Cited by 2 publications

References 15 publications

Monitoring transmission intensity of trachoma with serology

Monitoring transmission intensity of trachoma with serology

Monitoring transmission intensity of trachoma with serology

Contact Info

Product

Resources

About