Invasive Meningococcal Disease in Ireland

Invasive Meningococcal Disease in Ireland

Invasive Meningococcal Disease (IMD) is a notifiable disease in Ireland and is of major public health importance. IMD data are collected by HPSC with the assistance of Departments of Public Health, Microbiology Laboratories and the Irish Meningitis & Sepsis Reference Laboratory (IMSRL) in the CUH, Temple Street and disseminated to a wide range of professionals and members of the public.

This disease may present as meningitis, septicaemia (blood poisoning) or both. Meningitis is an inflammation of the meninges, which is the name given to the covering layer of the brain. IMD is the most common form of bacterial meningitis in Ireland (in 2019, 52.6% of all cases of bacterial meningitis were caused by IMD).

Since 1999, Neisseria meningitidis serogroup B has been the most common infecting serogroup in Ireland up until 2019 (except in 2017 when serogroup C disease notifications exceeded serogroup B notifications for the first time).

A meningococcal C conjugate vaccine (protective against serogroup C infections) was introduced in Ireland in October 2000. A meningococcal B vaccine (protective against serogroup B infections) was introduced to the national primary immunisation programme in December 2016.

IMD graph 2017

IMD in Ireland, 2019

89 The number of IMD notifications in 2019
  SgB, 33 cases
  SgC, 13 cases
  SgW, 10 cases
  SgY, 9 cases
1.5 The national notification rate per 100,000 population in 2019

Last updated: 03 November 2020