Haemophilus influenzae Type a Sequence Type 23, Northern Spain

Abstract

Two consecutive cases of Haemophilus influenzae type a sequence type 23 invasive infection in 2 children attending the same daycare in 2019 triggered epidemiologic surveillance of H. influenzae infections in northern Spain. Despite the invasiveness potential of this virus strain, we detected no additional cases for 2013–2020.

Keywords

• Haemophilus influenzae
• serotype a
• ST23
• surveillance
• respiratory infections
• bacteria