Explaining the continuing high prevalence of trachomatous trichiasis unknown to the health system in evaluation units: a mixed methods explanatory study in four trachoma-endemic countries

Summary

This article explores reasons for continuing higher-than-anticipated prevalence of trachomatous trichiasis (TT) unknown to the health system in population-based prevalence surveys in evaluation units where full geographical coverage of TT case finding was reported. Incorrectly reported geographical coverage of case-finding activities, and discrepancies in TT status between trachoma impact survey results and more detailed assessments, are the key reasons identified for continuing high TT prevalence.

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