TrachomaAzithromycinEyelashesHygieneEyelid DiseasesEntropionTrichiasisBlindnessChlamydia trachomatisTanzaniaEndemic DiseasesCommunicable Disease ControlAnti-Bacterial AgentsGambiaSudanToilet FacilitiesConjunctivitisPrevalenceConjunctivaChlamydiaConjunctivitis, InclusionEthiopiaNepalNeglected DiseasesConjunctival DiseasesLymphogranuloma VenereumMaliWater Supply