Abstracts purulent meningitis; no fatalities occurred. Second period (2002)(2003)(2004)(2005)(2006)(2007)(2008): 288 MID total cases and 5.9% (n = 17) were caused by NmW135. This serogroup emerged in the year 2007 (n = 6) and the peak occurred in 2008 (n = 10). Age group (range): 1 month-58 years old. Clinical presentation was bacteremia (5.9%), bacteremia and pneumonia (5.9%), bacteremia and arthritis (5.9%), fulminant sepsis (23.5%), and sepsis with purulent meningitis (58.8%). Considering

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... h periods, 4 adults were affected; age (range): 21 to 58 years old. The global fatality rate was 17.6% but in adults it was 50%. ), achieving 38.9% in 2008. Clinical and microbiological laboratory data are necessary for epidemiological surveillance to detect early changes in frequency and Nm serogroup incidence. The mechanism by which a strain causes sporadic or epidemic cases and the importance of a change in serogroup strains remain unknown.