Haemophilus influenzae in Ireland

Haemophilus influenzae is a bacterium that can cause serious infection in humans, particularly in children, but also in individuals with weakened immune systems.

There are a number of strains of H. influenzae. Strains are classified as those with capsules (capsular types) and those without capsules (non-encapsulated types). Six capsular types (a-f) are recognized.

A polysaccharide conjugate vaccine against type b (Hib) infections was introduced in Ireland in September 1992. In 2006 a Hib booster dose was introduced into infant schedule in the second year of life.


 Hib graph 2018

Haemophilus influenzae in Ireland, 2019

63 The number of Haemophilus influenzae notifications in 2019
1.3 The national notification rate per 100,000 population in 2019

Last updated: 03 November 2020