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http://hdl.handle.net/2445/129961
Title: | Characterization of intra- and inter-host norovirus P2 genetic variability in linked individuals by amplicon sequencing |
Author: | Sabrià Sunyé, Aurora Pintó Solé, Rosa María Bosch, Albert Quer, Josep García Cehic, Damir Gregori Font, Josep Domínguez García, Àngela Carol, Mónica Sala Farré, Maria Rosa Guix Arnau, Susana |
Keywords: | Virus Gastroenteritis Polimorfisme genètic Seqüència de nucleòtids Viruses Gastroenteritis Genetic polymorphisms Nucleotide sequence |
Issue Date: | 9-Aug-2018 |
Publisher: | Public Library of Science (PLoS) |
Abstract: | Noroviruses are the main cause of epidemics of acute gastroenteritis at a global scale.Although chronically infected immunocompromised individuals are regarded as potential reservoirs for the emergence of new viral variants, viral quasispecies distribution and evolution patterns in acute symptomatic and asymptomatic infections has not been extensively studied. Amplicons of 450 nts from the P2 coding capsid domain were studied using nextgeneration sequencing (454/GS-Junior) platform. Inter-host diversity between symptomatic and asymptomatic acutely infected individuals linked to the same outbreak as well as their viral intra-host diversity over time were characterized. With an average of 2848 reads per sample and a cutoff frequency of 0.1%, minor variant haplotypes were detected in 5 out of 8 specimens. Transmitted variants could not be confirmed in all infected individuals in one outbreak. The observed initial intra-host viral diversity in asymptomatically infected subjects was higher than in symptomatic ones. Viral quasispecies evolution over time within individuals was host-specific, with an average of 2.8 nt changes per day (0.0062 changes per nucleotide per day) in a given symptomatic case. Nucleotide polymorphisms were detected in 28 out of 450 analyzed nucleotide positions, 32.14% of which were synonymous and 67.86% were non-synonymous. Most observed amino acid changes emerged at or near blockade epitopes A, B, D and E. Our results suggest that acutely infected individuals, even in the absence of symptoms, which go underreported and may enhance transmission, may contribute to norovirus genetic variability and evolution. |
Note: | Reproducció del document publicat a: https://doi.org/10.1371/journal.pone.0201850 |
It is part of: | PLoS One, 2018, vol. 13, num. 8, p. e0201850 |
URI: | http://hdl.handle.net/2445/129961 |
Related resource: | https://doi.org/10.1371/journal.pone.0201850 |
ISSN: | 1932-6203 |
Appears in Collections: | Articles publicats en revistes (Genètica, Microbiologia i Estadística) Articles publicats en revistes (Medicina) |
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