Human Norovirus 2024

A special issue of Viruses (ISSN 1999-4915). This special issue belongs to the section "Human Virology and Viral Diseases".

Deadline for manuscript submissions: 31 August 2024 | Viewed by 1170

Special Issue Editor


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Guest Editor
Department of Virology II, National Institute of Infectious Diseases, Gakuen 4-7-1, Musashimurayama-shi, Tokyo 208-0011, Japan
Interests: human norovirus; human intestinal organoids; capsid protein caliciviruses; enteric virus infection

Special Issue Information

Dear Colleagues,

Human norovirus (HuNoV) causes approximately 18% of all gastroenteritis cases in all ages and is recognized as the leading cause of gastroenteritis outbreaks around the world. While the prevalence of HuNoV disease seems to be similar across the continents, an overwhelming majority of HuNoV-associated deaths occur in WHO-defined developing countries. HuNoV disease also has a significant economic impact, with an estimated global economic burden of 60.3 billion dollars per year, including health care costs and productivity loses. Costs due to productivity losses in high-income countries are particularly high.

Concerted efforts to control HuNoV disease face major challenges, including the genetic diversity of viruses and ongoing evolution, strain-restrictive culture systems with low efficiency, and the limited knowledge of host factors that play a role in HuNoV infection, and protective immunity against HuNoV. The periodical emergence of novel HuNoV strains leading to global pandemics is also a major concern. The vast genetic diversity of HuNoV imposes a hurdle for the development of a vaccine that can provide broad coverage across all strains. Global HuNoV surveillance is necessary even after the introduction of vaccines to monitor vaccine effectiveness. In vitro human norovirus culture is an invaluable tool that requires further optimization to support multiple passages, increase permissiveness to more strains, and achieve high virus titers. The current HIE culture system represents a fairly realistic model that allows researchers to study host factors beyond HBGAs, HuNoV entry and infection, and neutralizing antibody responses.

For this Special Issue, we are inviting the submission of papers focusing on both fundamental and applied aspects of norovirus research. Review papers and original research papers are welcome.

Dr. Kosuke Murakami
Guest Editor

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Keywords

  • virus replication and tropism
  • development of cost effective, point-of-care diagnostic assays
  • genetic evolution
  • pathogenesis
  • disinfection
  • antivirals and vaccines
  • foodborne and waterborne norovirus

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Published Papers (1 paper)

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Research

15 pages, 1283 KiB  
Article
Replication of Human Norovirus in Human Intestinal Enteroids Is Affected by Fecal Sample Processing
by Revati Narwankar and Malak A. Esseili
Viruses 2024, 16(2), 241; https://doi.org/10.3390/v16020241 - 02 Feb 2024
Viewed by 840
Abstract
Human intestinal enteroids (HIEs) culture is an emerging model for assessing the infectivity of human noroviruses (HuNoVs). The model is based on detecting an increase in HuNoV RNA post-infection of HIEs. HuNoV fecal samples used for HIE infection are traditionally processed by serial [...] Read more.
Human intestinal enteroids (HIEs) culture is an emerging model for assessing the infectivity of human noroviruses (HuNoVs). The model is based on detecting an increase in HuNoV RNA post-infection of HIEs. HuNoV fecal samples used for HIE infection are traditionally processed by serial filtration. Recently, processing HuNoV fecal samples by serial centrifugation was shown to retain vesicles containing HuNoV. The objective of this study was to investigate whether serially centrifuged fecal samples, RNA extraction kit (QIAamp versus MagMaX) and HIE age (newer versus older) affect HuNoV RNA fold increase in HIE. HuNoV GII.1, GII.4 and GII.6 fecal samples were prepared by serial centrifugation and filtration and the viral RNA in HIE was quantified at 1 and 72 h post-infection (hpi) following RNA extraction and RT-qPCR. The serially filtered GII.1, GII.4 and GII.6 showed successful replication in HIE, resulting in mean log increases of 2.2, 2 and 1.2, respectively, at 72 vs. 1 hpi. In contrast, only serially centrifuged GII.1 showed consistently successful replication. However, using newer HIE passages and the MagMAX kit resulted in mean log fold increases for serially centrifuged GII.1, GII.4 and GII.6 (1.6, 2.3 and 1.8 log, respectively) that were similar to serially filtered samples. Therefore, HuNoV fecal sample processing and HIE age can affect virus replication in the HIE model. Full article
(This article belongs to the Special Issue Human Norovirus 2024)
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