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| Home > Articles > Published articles > Characterization of intra- and inter-host norovirus P2 genetic variability in linked individuals by amplicon sequencing |
(Universitat de Barcelona. Institut de Recerca en Nutrició i Seguretat Alimentària) (Hospital Universitari Vall d'Hebron. Institut de Recerca) (Hospital Universitari Vall d'Hebron. Institut de Recerca) (Hospital Universitari Vall d'Hebron. Institut de Recerca) (Universitat de Barcelona. Departament de Salut Pública) (Universitat de Barcelona. Institut de Recerca en Nutrició i Seguretat Alimentària)| Date: | 2018 |
| 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 next-generation 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. |
| Grants: | Ministerio de Ciencia e Innovación PS09/02516 Ministerio de Economía y Competitividad PI 16/02005 Ministerio de Ciencia e Innovación PI16/00337 Ministerio de Ciencia e Innovación BIO2011-23461 Ministerio de Ciencia e Innovación IDI-20151125 |
| Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.  |
| Language: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Published in: | PloS one, Vol. 13 (august 2018) , ISSN 1932-6203 |
