The German Reference Centre for Meningococci (NRZM) is assigned by the RKI to perform laboratory surveillance of invasive meningococcal disease. In 2013 the NRZM received 445 samples from 399 individuals. Neisseria meningitidis was detected in 315 patients, in 296 of them from sterile compartments like blood and cerebrospinal fluid (this figure corresponds to the number of patients with invasive disease). In comparison, 341 cases of invasive meningococcal disease were notified in 2013 to the RKI as of 2014-01-15, cf. SurvStat@RKI. This figure reflects an almost unchanged incidence rate of meningococcal disease (0.42/100.000, cf. SurvStat@RKI) compared to 2012. As the NRZM reports all processed cases (even retrospectively), a coverage of 86% of reported cases can be assumed (87% in the previous year). In 47 (out of 296) patients with invasive disease detection of meningococci was accomplished using non-cultural methods only.
The proportion of disease due to serogroup C decreased slightly (19.8%), while that of B did not change (67.7%). The proportion of Y slightly increased to 8.7%, while that of W135 remained almost unchanged at 3.8%.
PorA and FetA continue to be used for "fine-typing" (cf. our reports from 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005 und 2004). In total 122 unique serogroup-PorA-FetA combinations (= "finetypes") were detected in 2013. The most common finetypes were B:P1.7-2,4:F1-5 (25, 9.1%), C:P1.5,2:F3-3 (20, 7.3%), C:P1.5-1,10-8:F3-6 (18, 6.5%), B:P1.7,16:F3-3 (17, 6.2%), and Y:P1.5-2,10-1:F4-1 (15, 5.5%).
Comments: The geographic distribution of B and C is similar. Moderate clustering of B:P1.7-2,4:F1-5 in western North-Rhine-Westphalia continues to be present. Finetype C:P1.5,2:F3-3 displays a sporadic distribution. Maps were generated with EpiScanGIS.
Disclaimer: the above data were generated with federal funds (RKI). Scientific use is prohibited without prior written consent by NRZM or RKI. Commercial use is strictly prohibited. Inclusion of figures or tables in talks or oral presentations is not allowed.
Version 0.3 © NRZM 2015