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. 2021 Sep;27(9):2504-2506.
doi: 10.3201/eid2709.204247.

Haemophilus influenzae Type a Sequence Type 23, Northern Spain

Maddi López-Olaizola, Amaia Aguirre-Quiñonero, Andrés Canut, José Luis Barrios, Gustavo Cilla, Diego Vicente, José María Marimón

Haemophilus influenzae Type a Sequence Type 23, Northern Spain

Maddi López-Olaizola et al. Emerg Infect Dis. 2021 Sep.

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; ST23; Spain; bacteria; respiratory infections; serotype a; surveillance.

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Figures

Figure
Figure
Pulsed-field gel electrophoresis patterns of invasive Haemophilus influenzae isolates collected during 2019–2020, Gipuzkoa, northern Spain. Lane 1, ST103; lane 2, ST760; lanes 3–4, ST23 isolates; lane 5, ST393; lane 6, ST6; lane 7, ST995; lane 8, ST2053; lane 9, ST46; lane 10, control isolate ATCC49766; lane MW, 50 kb DNA ladder. ST, sequence type; MW, molecular weight.
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