The laboratory surveillance system of Chlamydia trachomatis and Neisseria gonorrhoeae infections in Denmark.

This article presents results of surveillance of C. trachomatis and N. gonorrhoeae infection in Denmark. In 1999 and 2000, there were 291 and 309 male cases of laboratory-confirmed gonorrhoeae, whereas the number of female cases was 43 for both years. The penicillin resistance was steady, with a prevalence of 40% in 1999, whereas the prevalence of fluoroquinolone resistance increased from 0% in 1990 to 27% in 1999. The number of laboratory-confirmed C. trachomatis infections remains around 13 000 cases per year. Men aged 20-29 years and women aged 15-24 are the most at risk.