[Meningococcal disease in the Faroe Islands during the period 1978-1985].

On the Faroe Islands (45,000 inhabitants), a total of 203 cases of meningococcal disease (MD) were recorded during the period 1978-1985. The peak incidence was 95/100,000 in 1981. MD mainly attacked children, 30% were below two years and 75% were below 11 years of age. The lethality rate was 5.4% (11 deaths). In 1981, rifampicin was introduced as a prophylactic treatment against secondary cases and at the same time, a decrease in incidence occurred. The decrease was more pronounced in the part of the country where the number of prescribed prophylactic doses per case of MD was greatest. These observations indicate that the introduction of rifampicin may have modified the course of the epidemic. None of the MD-patients had received prophylactic treatment with rifampicin. Of 132 examined, one patient with complement deficiency was identified, indicating that complement deficiencies were not a major risk factor in the epidemic of MD on the Faroe Islands.