Norovirus (NoV) has been an emerging pathogen of enteric infections in the post-rotavirus vaccine era. GII.4 have played a major role in NoV infections while other genotypes were reported in sporadic outbreaks. In this study, we reported novel variant NoV GII.12 outbreaks in 2010, Taiwan with their genomic analysis and clinical manifestations compared to GII.4 infections. There were 30.5% (29 out of 95 cases) with NoV infection. The most common genotype was GII.4 (22, 75.9%) followed by GII.12 (5, 17.2%) and GII.3 (2, 6.9%). Phylogenetic analysis showed that our GII.12 sequences were closely aligned with reference genomes identified in the United Kingdom and the United States of America. When compared to patients infected by GII.4 NoV, those with GII.12 infection experienced a lower frequency and shorter duration of diarrhea. Continued research is essential to unravel the intricate relationship between NoV genotypes and clinical outcomes, guiding public health interventions and therapeutic strategies.
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http://dx.doi.org/10.1016/j.jfma.2024.07.024 | DOI Listing |
J Med Virol
July 2014
Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
Norovirus (NoV) and Sapovirus (SaV) have been reported as a common cause of acute gastroenteritis worldwide. For a decade, surveillances of NoV and SaV have been conducted continually in Thailand. To monitor the epidemiological situation and to determine the genetic variation of NoV and SaV in Chiang Mai, Thailand, 567 samples collected from pediatric patients hospitalized with acute gastroenteritis were examined during 2007, and 2010-2011 by semi-nested RT-PCR and nucleotide sequencing methods.
View Article and Find Full Text PDFIntervirology
July 2014
Virology and Epidemiology Division, Nara Prefecture Institute of Health, Sakurai City, Japan.
The present study aimed to describe the epidemiological characteristics of norovirus (NoV) associated with sporadic gastroenteritis in regional populations of Nara Prefecture, Japan, from the 2006/2007 to 2011/2012 epidemic season. Fecal specimens of sporadic gastroenteritis collected between September 2006 and August 2012 in Nara Prefecture were examined for the presence of NoV by reverse transcription-polymerase chain reaction. The NoV genotype was determined by nucleotide sequence analysis.
View Article and Find Full Text PDFPLoS One
April 2014
Vaccine Research Center, University of Tampere School of Medicine, Tampere, Finland.
Rotavirus (RV) and norovirus (NoV) are the two major causes of viral gastroenteritis (GE) in children worldwide. We have developed an injectable vaccine design to prevent infection or GE induced with these enteric viruses. The trivalent combination vaccine consists of NoV capsid (VP1) derived virus-like particles (VLPs) of GI-3 and GII-4 representing the two major NoV genogroups and tubular RV recombinant VP6 (rVP6), the most conserved and abundant RV protein.
View Article and Find Full Text PDFClin Lab
June 2013
Department of Developmental Medical Sciences, School of International Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
Background: Norovirus (NoV) is recognized as a significant cause of acute gastroenteritis in infants and young children worldwide. This study investigated the prevalence of NoV infection in hospitalized children with gastroenteritis in Chiang Mai, Thailand in 2006.
Methods: A total of 156 fecal specimens were collected from children with diarrhea admitted to McCormick Hospital in 2006.
Viral Immunol
April 2013
Vaccine Research Center, University of Tampere Medical School, Tampere, Finland.
Noroviruses (NoVs) are one of the leading causes of acute nonbacterial gastroenteritis in humans of all ages. In the 1990s, NoV genotype GII-4 became responsible for the majority of NoV sporadic gastroenteritis cases and outbreaks worldwide. Vaccine development against NoV GII-4 is underway.
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