title: Changing concepts of trachoma and its control.
mesh_terms: D001766:Blindness / Q000209:etiology; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D006920:Hygiene; D007303:Insect Vectors; D012749:Sexually Transmitted Diseases / Q000150:complications; D014141:Trachoma / Q000175:diagnosis* / Q000453:epidemiology / Q000635:transmission; D006113:United Kingdom