The authors describe the forms of cooperation between foreign institutions, Czech departments of Derma-tovenerology and nongovernmental organisations in the solution of health and sociál issues concerning pro-stitution. The projects described are the Czech-Flemish ESO project and Czech-German JANA project. Within the Czech-Flemish ESO project, a total of 239 prostitutes were examined in Prague between Janu-ary 2004 and February 2005, hepatitis B vaccination has been initiated in 218 of them. In all, 79% of these women were of Czech nationality, 9.6% Slovák, 5.8% Ukrainian and 2.1% Bulgarian. Anamnestic hepatitis B antibodies were found in 5.4% of the women. HBsAg was positive in one čase, chlamydial infection was diagnosed in 6.4% cases, gonorrhoea in 4.6%, syphilis in 2.1%. None of the women was HIV positive. Within the Czech-German JANA project, a total of 794 prostitutes were examined in the area along the Czech-Bavarian border between 1997 and 2004. From foreign nations, 46.5% were from the former Sovi-et Union, 12 nationalities were represented in total. The prevailing STIs were syphilis, 9.1%, chlamydial infection, 5.5%, gonorrhoea, 1.1%. HBsAg was positive in 4.5% of all cases. HIV infection was detected in three cases.

        Key words: prostitution - STI - prevention - hepatitis B - international collaboration