Abstract:
:Respiratory syncytial virus (RSV) is a significant cause of lower respiratory tract infection in infants and elderly. To understand the evolution of neutralizing epitopes on the RSV glycoprotein (G) and fusion (F) proteins, we conducted a multi-year surveillance program (OUTSMART-RSV) in the US. Analysis of 1,146 RSV samples from 2015-2017 revealed a slight shift in prevalence from RSV A (58.7%) to B (53.7%) between the two seasons. RSV B was more prevalent in elderly (52.9% and 73.4%). Approximately 1% of the samples contained both RSV A and B viruses. All RSV A isolates were ON1 and almost all the B isolates were BA9 genotypes. Compared with the 2013 reference sequences, changes at the F antigenic sites of RSV B were greater than RSV A, which mainly occurred at antigenic sites V (L172Q/S173L at 99.6%), Ø (I206M/Q209K at 18.6%) and IV (E463D at 7%) of RSV B F. Sequence diversities in the G protein second hypervariable region were observed in the duplicated regions for RSV A and B, and at the G stop codon resulting in extension of 7 amino acids (22.1%) for RSV B in 2016-17. Thus, RSV surface glycoproteins are continuously evolving, and continued surveillance is important for the clinical evaluation of immunoprophylactic products.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Bin Lu,Liu H,Tabor DE,Tovchigrechko A,Qi Y,Ruzin A,Esser MT,Jin Hdoi
10.1038/s41598-019-40387-ysubject
Has Abstractpub_date
2019-03-07 00:00:00pages
3898issue
1issn
2045-2322pii
10.1038/s41598-019-40387-yjournal_volume
9pub_type
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