Epidemiology and Genetic Variability of Circulating Influenza B Viruses in Uruguay, 2012-2019.
epidemiology
influenza B
phylogenetic
surveillance
victoria
yamagata
Journal
Microorganisms
ISSN: 2076-2607
Titre abrégé: Microorganisms
Pays: Switzerland
ID NLM: 101625893
Informations de publication
Date de publication:
19 Apr 2020
19 Apr 2020
Historique:
received:
27
02
2020
revised:
31
03
2020
accepted:
05
04
2020
entrez:
25
4
2020
pubmed:
25
4
2020
medline:
25
4
2020
Statut:
epublish
Résumé
Influenza B viruses (IBV) are an important cause of morbidity and mortality during interpandemic periods in the human population. Two phylogenetically distinct IBV lineages, B/Yamagata and B/Victoria, co-circulate worldwide and they present challenges for vaccine strain selection. Until the present study, there was little information regarding the pattern of the circulating strains of IBV in Uruguay. A subset of positive influenza B samples from influenza-like illness (ILI) outpatients and severe acute respiratory illness (SARI) inpatients detected in sentinel hospitals in Uruguay during 2012-2019 were selected. The sequencing of the hemagglutinin (HA) and neuraminidase (NA) genes showed substitutions at the amino acid level. Phylogenetic analysis reveals the co-circulation of both lineages in almost all seasonal epidemics in Uruguay, and allows recognizing a lineage-level vaccine mismatch in approximately one-third of the seasons studied. The epidemiological results show that the proportion of IBV found in ILI was significantly higher than the observed in SARI cases across different groups of age (9.7% ILI, 3.2% SARI) and patients between 5-14 years constituted the majority (33%) of all influenza B infection (
Identifiants
pubmed: 32325860
pii: microorganisms8040591
doi: 10.3390/microorganisms8040591
pmc: PMC7232498
pii:
doi:
Types de publication
Journal Article
Langues
eng
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