Epidemics of serogroup A Neisseria meningitidis of subgroup III in Africa, 1989-94.
A total of 125 strains of Neisseria meningitidis recovered in the course of outbreaks from patients with systemic disease in 11 African countries between 1989 and 1994 were analysed by serogrouping, serotyping and multilocus enzyme electrophoresis.