Search results for "Norovirus GI"

Norovirus GII.17 as Major Epidemic Strain in Italy, Winter 2015–16

2017

In winter 2015-16, norovirus GII.17 Kawasaki 2014 emerged as a cause of sporadic gastroenteritis in children in Italy. Median patient age was higher for those with GII.17 than GII.4 infection (55 vs. 24 months), suggesting limited cross-protection for older children.

Nearly Complete Genome Sequence of a Human Norovirus GII.P17-GII.17 Strain Isolated from Brazil in 2015

2019

Human noroviruses are the most common cause of nonbacterial acute gastroenteritis worldwide. We report here the nearly complete genome sequence (7,551 nucleotides) of a human norovirus GII.P17-GII.17 strain detected in July 2015 in the stool sample from an adult with acute gastroenteritis in Brazil.

GIV noroviruses and other enteric viruses in bivalves

2011

The impact of sewage discharge on the microbiological quality of shellfish is well known. Bivalves filter large volumes of water as part of their feeding activities, and thus accumulate and concentrate different types of pathogens from human fecal pollution. The aim of the study was to evaluate the presence, in these molluscs, of six different groups of enteric viruses: norovirus (genogroups I, II, and GIV), adenovirus, enterovirus, astrovirus, hepatitis A virus, and hepatitis E virus. The present study is the first to document the presence of GIV noroviruses in shellfish.

Recombinant norovirus GII.g/GII.12 gastroenteritis in children.

2011

Recombinant GII.g/GII.12 norovirus (NoV) strains emerged in 2008 in Australia and subsequently have been associated with gastroenteritis outbreaks worldwide. In the winter season 2009-2010 GII.12 strains caused 16% of the NoV outbreaks in the United States. During 2009-2010 we also identified GII.g/GII.12 strains during surveillance of sporadic cases of gastroenteritis in Italian children. Severity scores were calculated for the GII.g/GII.12 NoV infections using the Vesikari scale and in two out of three paediatric cases they exceeded the median value calculated for concomitant GII.4 infections. Upon sequence analysis, the Italian strains were found to be recombinant viruses and displayed d…

Free Chlorine and Peroxynitrite Alter the Capsid Structure of Human Norovirus GII.4 and Its Capacity to Bind Histo-Blood Group Antigens

2021

Human noroviruses (HuNoVs) are one of the leading causes of acute gastroenteritis worldwide. HuNoVs are frequently detected in water and foodstuffs. Free chlorine and peroxynitrite (ONOO−) are two oxidants commonly encountered by HuNoVs in humans or in the environment during their natural life cycle. In this study, we defined the effects of these two oxidants on GII.4 HuNoVs and GII.4 virus-like particles (VLPs). The impact on the capsid structure, the major capsid protein VP1 and the ability of the viral capsid to bind to histo-blood group antigens (HBGAs) following oxidative treatments were analyzed. HBGAs are attachment factors that promote HuNoV infection in human hosts. Overall, our re…

Evaluation of VIASURE real-time PCR assays for detection of rotavirus and norovirus GI and GII in fecal samples

2016

Caratterizzazione molecolare di norovirus GIV ed altri virus enterici in molluschi bivalvi : uno studio preliminare

2011

I virus enterici si replicano nell’intestino umano e possono essere eliminati dagli individui infetti ad elevate concentrazioni; pertanto i reflui urbani possono trasportare una grande quantità di patogeni responsabili di infezioni oro-fecali e contaminare le acque superficiali, incluse quelle marine. I molluschi bivalvi eduli sono spesso implicati nella trasmissione di malattie gastroenteriche di origine virale in quanto, essendo organismi filtratori, rappresentano un potenziale serbatoio di agenti patogeni e sostanze tossiche. Nonostante i miglioramenti delle tecniche per il trattamento delle acque reflue e la classificazione delle aree di allevamento e raccolta dei molluschi, il rischio …