title: The MRC trachoma unit a review of its researches, 1956-1973.
mesh_terms: D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D002692:Chlamydia trachomatis / Q000032:analysis / Q000302:isolation & purification; D003168:Complement Fixation Tests; D003235:Conjunctivitis, Inclusion / Q000382:microbiology; D005455:Fluorescent Antibody Technique; D005714:Gambia; D006268:Health Facilities; D006801:Humans; D007391:International Cooperation; D009500:Neutralization Tests; D012106:Research; D012189:Retrospective Studies; D012703:Serotyping; D014141:Trachoma / Q000175:diagnosis / Q000276:immunology / Q000517:prevention & control; D014611:Vaccination; D014779:Virus Replication