Outbreak of meningococcal disease caused by PorA-deficient meningococci.

van der Ende, A; Hopman, C T P; Keijzers, W C M; Spanjaard, L; Lodder, E B; van Keulen, P H J; Dankert, J · J Infect Dis · 2003

case_series · Level IV

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Abstract

An outbreak of 7 cases of group C meningococcal disease occurred during the last week of July and the first week of August 2001 in the southwestern part of The Netherlands. Characterization of the 7 patients' isolates by various typing methods showed that the isolates were identical, except for the expression of PorA. Isolates from 5 patients were PorA deficient. These results show that transmission of PorA-deficient meningococci occurs and that PorA-deficient meningococci can cause invasive disease. PorA-based meningococcal vaccines may provide limited protection.

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