Emergence of new clone of Neisseria meningitidis Serogroup C in Grande São Paulo, 1990 a 2003 / Descrição de um novo clone de Neisseria meningitidis Sorogrupo C, Grande São Paulo, 1990 a 2003

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Neisseria meningitidis (Men) is an important cause of morbidity and mortality and is a leading cause of bacterial meningitis and septicemia in children and young adults in Brazil. Meningococcal disease caused by MenC started becoming the most prevalent serogroup in 2001, representing 62.7% of all MD cases serogrouped in 2003 in Greater Sao Paulo and approximately 88.5% of MenC isolates were nonserotypeable and non-serosubtypeable (NST:NSST). This data suggested that a novel invasive isolate (C:NT:NSST) had emerged in GSP, and considering the historical importance of MenC disease in the region, we initiated this study to better understand the dynamics of MD looking at the phenotypic and molecular characteristics of these isolates. To accomplish this goal, we characterized 753 MenC isolates recovered during the period of 1990 to 2003 by serotyping, PorS and PorA VR typing, 16S rRNA gene typing and produced new serotyping monoclonal antibodies (MAbs) to characterize the C:NST:NSST isolates. We were able to select two hybridoma cells that recognizes PorB and PorA proteins. Among the 255 strains initially characterized as NST:NSST, 75% (n=191) of them became completely serotyped as 23:P1 .14-6. Sy 16S RNA ribossomal typing, these strains showed the same pattern suggesting strain clonality. Our data demonstrate the introduction of a new clone of Neisseria rneningitidis C presenting the phenotype C:23:P1.14-6 and that is being responsible for the increase of the cases of DM caused by this serogroup in Great Sao Paulo.

ASSUNTO(S)

neisseria meningitidis neisseria meningitidis sorogrupo c meningite meningitis serogroup c

ACESSO AO ARTIGO

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