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Volume 27, Number 9—September 2021
Research Letter

Haemophilus influenzae Type a Sequence Type 23, Northern Spain

Maddi López-Olaizola, Amaia Aguirre-Quiñonero, Andrés Canut, José Luis Barrios, Gustavo Cilla, Diego Vicente, and José María Marimón
Author affiliations: Biodonostia Health Research Institute, Infectious Diseases Area, Osakidetza Basque Health Service, Donostialdea Integrated Health Organization, San Sebastián, Spain (M. López-Olaizola, G. Cilla, D. Vicente, J.M. Marimón); Osakidetza Basque Health Service, Araba Integrated Health Organization, Vitoria-Gasteiz, Spain (A. Aguirre-Quiñonero, A. Canut); Osakidetza Basque Health Service, Ezkerraldea-Enkarterri-Cruces Integrated Health Organization, Bilbao, Spain (J.L. Barrios)

Main Article

Table

Epidemiologic and microbiological characteristics of Haemophilus influenzae invasive isolates, Gipuzkoa, Northern Spain, January 2013–December 2020*

Year No. isolates†* Biotype
 Capsulated serotypes/ST
 Nonencapsulated serotypes (no. isolates)
I II III IV V a b e NT ST‡
2013 7 4 2 1 1/ST6 6 41, 368 (2), 388, 996, 2381§
2014 5 1 4 1/ST190 4 105, 249, 1034, 1608
2015 4 3 1 4 40, 155 (2), 2382§
2016 7 1 4 1 6 3, 85, 103, 266, 937, 2383§
2017 5 2 2 1 1/ST6 4 134, 567, 653, 986
2018 9 2 1 4 1¶ 6 14, 145, 165, 838, 1472, 2384§
2019 11 1 6 1 2 2/ST23 1/ST995 1/ST760 6 6, 14, 103, 393, 603, 2110
2020 5 2 3 5 143, 183, 280, 334, 349
Total 53 13 24 5 2 5 2 5 1 41

*NT, nontypeable; ST, sequence type. †Four isolates were not available for microbiological characterization: 1 in 2016, 2 in 2018, 1 in 2019. ‡If the number of isolates of a specific ST was not 1, the number of isolates corresponding to that ST is indicated in brackets. §New ST found in this study. ¶Serotype was determined but the isolate was not available for multilocus sequence typing.

Main Article

Page created: July 30, 2021
Page updated: August 18, 2021
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