“…The incidence of this "inclusion-urethritis" is believed to be small, with estimations varying between 3 and 5 per cent. of all cases of non-gonococcal urethritis (Thygeson, 1954;Durel and Siboulet, 1954;Freundt, 1956). The idea of Lindner's that the agent causing trachoma was also responsible for inclusion-urethritis, cervicitis, and conjunctivitis has been recently revived with great success when it was found that contacts of one condition could develop one of the other diseases in this group and that experimental infection with the virus isolated from trachoma could produce inclusion-conjunctivitis (Gear, Gordon, Jones, and Bell, 1963 Jones and his associates isolated TRIC virus from a few men with inclusion-urethritis, thus opening the way for further study of its significance in genital infection (Jones, 1964;Dunlop, Jones, and Al-Hussaini, 1964).…”