Abstract

We compared viral load of emerging recombinant norovirus GII.P16-GII.2 with those for pandemic GII.Pe-GII.4 and epidemic GII.P17-GII.17 genotypes among inpatients in Hong Kong. Viral load of GII.P16-GII.2 was higher than those for other genotypes in different age groups. GII.P16-GII.2 is as replication competent as the pandemic genotype, explaining its high transmissibility and widespread circulation.

Highlights

  • We compared viral load of emerging recombinant norovirus GII.P16-GII.2 with those for pandemic GII.Pe-GII.4 and epidemic GII.P17-GII.17 genotypes among inpatients in Hong Kong

  • The median viral load of GII.Pe-GII.4 declined with age, whereas that of GII.P16-GII.2 remained at the same high level among different age groups

  • Our results show that the emerging recombinant norovirus GII.P16-GII.2 is as replication competent as pandemic genotypes, which explains its high transmissibility and widespread circulation

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Summary

Introduction

We compared viral load of emerging recombinant norovirus GII.P16-GII.2 with those for pandemic GII.Pe-GII.4 and epidemic GII.P17-GII.17 genotypes among inpatients in Hong Kong. GII.P16 actively recombined with >8 capsid genotypes [6,7,8] and may have pandemic potential and lead to a change in norovirus epidemiology. We compared the viral load of norovirus GII.P16-GII.2 with pandemic GII.Pe-GII.4 and epidemic GII.P17-GII.17 in a cohort of hospitalized patients in Hong Kong over a 5-year period.

Results
Conclusion

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