About the Authors

Emma M. Harding-Esch

Affiliation London School of Hygiene & Tropical Medicine, London, United Kingdom

Ansumana Sillah

Affiliation National Eye Health Programme of The Gambia, Kanifing, The Gambia

Tansy Edwards

Affiliation London School of Hygiene & Tropical Medicine, London, United Kingdom

Sarah E. Burr

Affiliations London School of Hygiene & Tropical Medicine, London, United Kingdom, Medical Research Council Unit, Fajara, The Gambia

John D. Hart

Affiliations London School of Hygiene & Tropical Medicine, London, United Kingdom, Medical Research Council Unit, Fajara, The Gambia

Hassan Joof

Affiliation Medical Research Council Unit, Fajara, The Gambia

Mass Laye

Affiliation National Eye Health Programme of The Gambia, Kanifing, The Gambia

Pateh Makalo

Affiliation Medical Research Council Unit, Fajara, The Gambia

Ahmed Manjang

Affiliation Medical Research Council Unit, Fajara, The Gambia

Sandra Molina

Affiliation London School of Hygiene & Tropical Medicine, London, United Kingdom

Isatou Sarr-Sissoho

Affiliation Medical Research Council Unit, Fajara, The Gambia

Thomas C. Quinn

Affiliation National Institute for Allergy and Infectious Diseases, Bethesda, Maryland, United States of America

Tom Lietman

Affiliation University of California, San Francisco, California, United States of America

Martin J. Holland

Affiliations London School of Hygiene & Tropical Medicine, London, United Kingdom, Medical Research Council Unit, Fajara, The Gambia

David Mabey

Affiliation London School of Hygiene & Tropical Medicine, London, United Kingdom

Sheila K. West

Affiliation Dana Center for Preventive Ophthalmology, Johns Hopkins University, Baltimore, Maryland, United States of America

Robin Bailey

Robin.Bailey@lshtm.ac.uk

Affiliation London School of Hygiene & Tropical Medicine, London, United Kingdom

on behalf of the Partnership for Rapid Elimination of Trachoma (PRET) study group

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: EMHE RB SKW TCQ DM TL AS. Performed the experiments: HJ PM ML MJH AM ISS JDH AS EMHE RB SEB SM. Analyzed the data: EMHE RB JDH TE. Contributed reagents/materials/analysis tools: SKW TL RB SEB MJH. Wrote the paper: EMHE TE RB JDH.