Serogroup distribution of meningococci responsible for invasive infections in Poland, 2002–2011.

<p>(n = 1936; UNK - cases with unknown serogroup).</p

Molecular characterization of meningococcal isolates of serogroup B and C belonging to the most dominant clonal complexes (CC) represented at least by 10 isolates, 2009–2011.

a<p>ST – sequence type.</p

Map of Poland with the incidence rates (per 100,000) of invasive meningococcal disease in children under 1 year of age/all age groups, in 16 voivodeships, in years 2010–2011.

<p>The voivodeships with notified outbreaks during study period are marked in yellow (OUT. – outbreak, numbered like in the text, the year of the outbreak, in bracket there is number of outbreak cases).</p

The total annual incidence rates (/100,000) of invasive meningococcal disease (IMD)/meningitis rates in age groups in Poland based on laboratory-confirmed cases, including culture- and PCR-positive samples, 2002–2011 (only cases with known age were included when calculating the incidence) and total annual incidence rates of IMD registered by the compulsory notification system (NIPH-NIH).

a<p>%Cases <b>-</b> percentage of IMD cases in age group among all cases;</p>b<p>No cases - total number of cases in a particular year;</p>c<p>percentage of cases identified by PCR in a particular year;</p>d<p>Men-cult. - incidence rates of meningitis confirmed by culture only;</p>e<p>NIPH-NIH – total incidence of invasive meningococcal disease for all age groups registered by compulsory notification system run by the National Institute of Public Health – National Institute of Hygiene (Available: <a href="http://www.pzh.gov.pl/oldpage/epimeld/index_p.html" target="_blank">http://www.pzh.gov.pl/oldpage/epimeld/index_p.html</a>. Accessed 2013 May 24).</p

Incidence of invasive meningococcal disease (/100,000) case fatality rate (CFR) and percentage of cases with sequelae in age groups in Poland, 2010–2011 (only cases with known outcome were included when calculating the CFR, n = 458).

a<p>MenB CFR - case fatality rate associated with infections caused by serogroup B meningococci;</p>b<p>MenC CFR - case fatality rate associated with infections caused by serogroup C meningococci.</p