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 2017

Haemophilus influenzae in Ireland, 2017

45 The number of Haemophilus influenzae notifications in 2017
0.9 The national notification rate per 100,000 population in 2017

Last updated: 19 April 2018