New cases of neurosyphilis in Finland.

A more than tenfold increase in the annual incidence of infectious syphilis occurred in Finland during the 60s. Since then about 4 cases per 100 000 per year have been reported to the Central Medical Board. During the 70s, 39 new cases of neurosyphilis, verified by clinical and serological examinations, were recorded. At least 14 of these patients were primarily infected after 1955. The data suggest that new cases of neurosyphilis may turn up in the near future and indicate that intensified epidemiological control is still needed.