[Purulent meningitis among adults in the county of Frederiksborg. Therapeutic results in the period 1 January 1980--31 December 1990].

A review of 158 cases of bacterial meningitis and meningococcal sepsis in adults is presented. The patients were admitted during a 11-year period, from 1980-1990. The incidence was 5.5/100,000 adults per year, which is high. The area had epidemics of meningococcal disease in the years 1987 and 1989. The bacterial agent was meningococci in 40.5%, pneumococci in 21.5% and unknown in 27.2%. The overall lethality was 13.9%, highest (26%) in patients who were infected by pneumococci. The meningococcal relative lethality was 14%. In the period of high meningococcal incidence 1986-1989, we found a relative lethality of 17%. The overall local hospital lethality was 18.3%, which has to be compared with 11.2% among patients primarily admitted to the County hospital. The lethality among patients who underwent emergency transfer from one of the local hospitals to the County hospital was 20%, which is as high as in the group of patients treated locally. Neither of these trends lethality are statistically significant at the level of 5%, tested by chi square tests.