Serogroup B meningococcal disease--Oregon, 1994.

In Oregon, the incidence of meningococcal disease has increased substantially, more than doubling from 2.2 cases per 100,000 persons in 1992 to 4.6 per 100,000 in 1994--the highest incidence in Oregon since 1943. This incidence was almost fivefold higher than recent estimates for the United States during 1989-1991 (approximately one case per 100,000 persons annually) (1). This report describes meningococcal disease surveillance data from 1994 and summarizes epidemiologic and laboratory data on serogroup B meningococcal disease in Oregon during 1987-1994.