Identification of GII.14[P7] norovirus and its genomic mutations from a case of long-term infection in a post-symptomatic individual
Infection, Genetics and Evolution, ISSN: 1567-1348, Vol: 86, Page: 104612
2020
- 2Citations
- 14Captures
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Metrics Details
- Citations2
- Citation Indexes2
- CrossRef1
- Captures14
- Readers14
- 14
Article Description
Norovirus is a leading cause of acute gastroenteritis worldwide. Norovirus shedding typically lasts one week to one month after the onset of diarrhea in immunocompetent hosts. The occurrence of mutations in the genome during infection has contributed to the evolution of norovirus. It has been suggested that genomic mutations in the P2-domain of capsid protein VP1, the major antigenic site for virus clearance, are involved in the evasion of host immunity and prolonged shedding of norovirus. In our previous study, we found a case of long-term shedding of GII.14 norovirus in a post-symptomatic immunocompetent individual that lasted about three months. In this study, we characterized the genomic sequence of the GII.14 strain to gain insight into the context of long-term shedding. By sequencing a 4.8 kb region of the genome corresponding to half of ORF1 and the entire ORF2 and ORF3, which encode several non-structural proteins and the structural proteins VP1 and VP2, the GII.14 strain was found to be classified as recombinant GII.14[P7]. Six point-mutations occurred during the three-month period of infection in a time-dependent manner in the genomic regions encoding RNA-dependent RNA polymerase, VP1, and VP2. Three of the six mutations were sense mutations, but no amino acid substitution was identified in the P2-domain of VP1. These results suggest that there is a mechanism by which long-term shedding of norovirus occurs in immunocompetent individuals independent of P2-domain mutations.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1567134820304433; http://dx.doi.org/10.1016/j.meegid.2020.104612; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85096230872&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/33137471; https://linkinghub.elsevier.com/retrieve/pii/S1567134820304433; https://dx.doi.org/10.1016/j.meegid.2020.104612
Elsevier BV
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