Through a network of 100 general practitioners, all cases of gonococcal and non-gonococcal urethritis in males were registered over a period of one year. This study permitted us to estimate the annual number of cases in the whole country at 25,375 cases which is 66.8 cases per 10,000 males aged 15 years and over. The highest incidence was observed between 25 and 34 years of age and among bachelors. In more than 70% of cases, the contact could be traced. The most frequently identified contacts were casual partners and prostitutes, totalling 61.4% of known contacts.