Clinical investigations of the usefulness of routine epidemiological treatment of sexual contacts of men with non-gonococcal urethritis (NGU) have produced conflicting results that could have been due to the selection of patients. In this study, which was undertaken in a provincial city, 100 men with untreated sexual partners and 100 demographically similar men with treated sexual partners were reviewed for recurrences of NGU over 12 months. Prolonged courses of tetracyclines were found to be beneficial particularly when the sexual partner gave positive results to tests for chlamydiae. There was, however, no clinical evidence that the men benefited from routine epidemiological treatment of their sexual partners.
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