[Meningococcal infections in Switzerland : changes in epidemiology, clinical manifestations and prophylaxis].

In the last decade, the epidemiology of meningococcal infections in Switzerland and Europe has changed. The prevalence of Y and W serogroups augmented, with more atypical clinical manifestations such as pharyngitis, pneumonia and arthritis. A hypervirulent clonal serogroup W strain of Neisseria meningitidis has emerged in Europe and Switzerland, with a noticeable potential for epidemics as evidenced by its clonality. In this context, vaccinal recommendations for risk groups have and will continue to evolve towards the use of novel conjugated vaccines.