Epidemiology and Infection

Research Article

Targeted vaccination with meningococcal polysaccharide vaccine in one district of the Czech Republic

P. Kriza1, J. Vlckovaa2 and M. Bobaka3

a1 National Reference Laboratory for Meningococcal Infections, National Institute of Public Health, Srobarova 48, 100 42 Prague 10, Czech Republic

a2 District Institute of Hygiene, Olomouc, Czech Republic

a3 Department of Epidemiology and Population Sciences, London School of Hygiene and Tropical Medicine, London, UK

Summary

Vaccination against Neisseria meningitidis is not part of routine immunization schemes in any country; instead, targeted vaccination of groups at the highest risk is recommended during outbreaks and epidemics. After a long period of sporadic occurrence of meningococcal invasive disease, a new clone of Neisseria meningitidis C: 2a: P1.2, ET-15/37, occurred in the Czech Republic, and caused local outbreaks in two neighbouring districts, Olomouc and Bruntal, in spring 1993. In Olomouc, a mass campaign was conducted during which 6191 students were vaccinated (5·6 % of the total population of this locality and 96% of all students in the age group 15–19) within 2 weeks in June 1993. In Bruntal district, no such campaign was organized. In Olomouc, the incidence of invasive disease caused by Neisseria meningitidis C in the age group 10–24 decreased from 57 to 0 per 100000 (P < 0·001) during the post-vaccination period (July 1993–August 1994), but no such decrease was observed in Bruntal. Although other factors can affect the frequency of disease, these results support the current recommendations of targeted vaccination in outbreaks of meningococcal disease.

(Accepted June 16 1995)

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