Back to Search
Start Over
Genetic divergence of Influenza A(H3N2) amino acid substitutions mark the beginning of the 2016–2017 winter season in Israel
- Source :
- Journal of Clinical Virology
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Highlights • A(H3N2) dominated the early stages of the 2016–2017 influenza season. • 36% of hospitalized infected patients received the influenza vaccine. • Circulating A(H3N2) viruses were different from the vaccine strain.<br />Background Influenza vaccine composition is reevaluated each year due to the frequency and accumulation of genetic changes that influenza viruses undergo. The beginning of the 2016–2017 influenza surveillance period in Israel has been marked by the dominance of influenza A(H3N2). Objectives To evaluate the type, subtype, genetic evolution and amino acid substitutions of influenza A(H3N2) viruses detected among community patients with influenza-like illness (ILI) and hospitalized patients with respiratory illness in the first weeks of the 2016–2017 influenza season. Study design Respiratory samples from community patients with influenza-like illness and from hospitalized patients underwent identification, subtyping and molecular characterization. Hemagglutinin sequences were compared to the vaccine strain, phylogenetic tree was created, and amino acid substitutions were determined. Results Influenza A(H3N2) predominated during the early stages of the 2016–2017 influenza season. Noticeably, approximately 20% of community patients and 36% of hospitalized patients, positive for influenza3), received the 2016–2017 influenza vaccine. The influenza A(H3N2) viruses demonstrated genetic divergence from the vaccine strain into three separate subgroups within the 3C.2a clade. One resembled the new 3C.2a1 subclade, one resembled the recently proposed 3C.2a2 subclade and the other was not previously described. Diversity was observed within each subgroup, in terms of additional amino acid substitutions. Conclusions Characterization of the 2016–2017 A(H3N2) influenza viruses is imperative for determining the future influenza vaccine composition.
- Subjects :
- Models, Molecular
0301 basic medicine
Influenza vaccine
viruses
030106 microbiology
Hemagglutinin Glycoproteins, Influenza Virus
Influenza A
Biology
complex mixtures
H5N1 genetic structure
Article
Madin Darby Canine Kidney Cells
03 medical and health sciences
Dogs
Virology
Influenza, Human
Animals
Humans
Amino Acid Sequence
Israel
Clade
Phylogeny
Molecular Epidemiology
Molecular epidemiology
Phylogenetic tree
Influenza A Virus, H3N2 Subtype
Genetic Drift
virus diseases
Subclade
H3N2
respiratory tract diseases
3. Good health
Genetic divergence
Clade 3C.2a1
030104 developmental biology
Infectious Diseases
Amino Acid Substitution
Molecular Diagnostic Techniques
Human mortality from H5N1
Seasons
Subjects
Details
- ISSN :
- 13866532
- Volume :
- 93
- Database :
- OpenAIRE
- Journal :
- Journal of Clinical Virology
- Accession number :
- edsair.doi.dedup.....35574ec75e8a79bf6f7e0bc10eaffde0