Search results for "Viral genetics"

showing 4 items of 4 documents

Evidence for recombination between the pandemic GII.4 norovirus strains New Orleans 2009 and Sydney 2012

2013

ABSTRACT During 2012, a novel pandemic GII.4 norovirus variant, Sydney 2012, emerged worldwide. A signature of the variant was a GII.Pe ORF1, in association with GII.4 Apeldoorn 2008-like ORF2-ORF3 genes. We report the detection of recombinant GII.4 Sydney 2012 strains, possessing the ORF1 gene of the former pandemic variant New Orleans 2009.

Microbiology (medical)Settore MED/07 - Microbiologia E Microbiologia ClinicaNorovirus GII.4 Sydney 2012 New Orleans 2009 recombinationvirusesMolecular Sequence DataBiologymedicine.disease_causeOpen Reading Framesfluids and secretionsViral geneticsVirologyPandemicmedicineHumansChildPandemicsCaliciviridae InfectionsRecombination GeneticGeneticsNorovirusvirus diseasesSequence Analysis DNAVirologyChild PreschoolNorovirusRNA Viral
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Statements from the Taormina expert meeting on occult hepatitis B virus infection

2008

Giovanni Raimondo*, Jean-Pierre Allain, Maurizia R. Brunetto, Marie-Annick Buendia, Ding-Shinn Chen, Massimo Colombo, Antonio Craxi, Francesco Donato, Carlo Ferrari, Giovanni B. Gaeta, Wolfram H. Gerlich, Massimo Levrero, Stephen Locarnini, Thomas Michalak, Mario U. Mondelli, Jean-Michel Pawlotsky, Teresa Pollicino, Daniele Prati, Massimo Puoti, Didier Samuel, Daniel Shouval, Antonina Smedile, Giovanni Squadrito, Christian Trepo, Erica Villa, Hans Will, Alessandro R. Zanetti, Fabien Zoulim

HBV; guidelinesmedia_common.quotation_subjectviral hepatitisOccult hepatitis B virus infection OBISeropositive OBI and Seronegative OBImedicine.disease_causeOccult hepatitis B virus; molecular detection of HBV DNA; viral hepatitis; HBV transmissionOccult hepatitis B virusViral geneticsHBVmedicineguidelinesmedia_commonHepatitis B virusOccult hepatitis B virus infection OBI; Seropositive OBI and Seronegative OBI; False OBI; Clinical impact of OBI; Diagnosis of OBI and epidemiological aspectsHepatologymolecular detection of HBV DNAFalse OBIClinical impact of OBIArtOccult hepatitis B infectionOccultVirologyDiagnosis of OBI and epidemiological aspectsHBV transmissionHumanities
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Genetic characterization of G3 rotaviruses detected in Italian children in the years 1993–2005

2009

International audience; In recent years an apparent increase in the frequency of detection of G3P[8] rotaviruses has been observed worldwide. Similarly, in Italy G3P[8] strains have been detected sporadically and in a scattered fashion over 20 years, whereas in 2003 and 2005 G3P[8] rotavirus activity increased markedly. By analysis of the VP7, VP4, VP6 and NSP4 genes of a selection of G3P[8] rotaviruses detected between 1993 and 2005, a remarkable sequence conservation was observed in the VP7, VP4 and VP6 genes. By converse, after 2002 the Italian G3P[8] strains were found to possess unique mutations in significant regions of the NSP4 protein.

RotavirusSettore MED/07 - Microbiologia E Microbiologia ClinicaSettore MED/17 - Malattie InfettiveSequence analysisNSP4virusesMolecular Sequence DataReoviridaeViral Nonstructural ProteinsBiologymedicine.disease_causeRotavirus InfectionsVirusFeces03 medical and health sciencesfluids and secretionsViral geneticsPhylogeneticsVirologyRotavirusGenotypemedicineHumansAmino Acid SequenceAntigens ViralGenePhylogenyGlycoproteinsToxins Biological030304 developmental biology0303 health sciencesSequence Analysis RNA030306 microbiologyInfant NewbornInfantvirus diseasesbiology.organism_classificationVirologyInfectious DiseasesItalyChild PreschoolRNA ViralMedicineCapsid Proteinssequence analysirotavirus G3P[8]gastroenteriti
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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…

Microbiology (medical)Settore MED/07 - Microbiologia E Microbiologia Clinicacongenital hereditary and neonatal diseases and abnormalitiesGenotypeSequence analysisvirusesBiologyNorovirus GII.g GII.12 Gastroenteritis Italy Recombinationmedicine.disease_causeMicrobiologylaw.inventionMicrobiologyDisease Outbreaksfluids and secretionsViral geneticslawGenotypeGeneticsmedicineHumansChildMolecular BiologyEcology Evolution Behavior and SystematicsPhylogenyNorovirus GIIRecombination GeneticPolymorphism GeneticNorovirusvirus diseasesOutbreakInfantSequence Analysis DNAVirologyGastroenteritisPhylogeographyInfectious DiseasesItalyChild PreschoolNorovirusRecombinant DNARNA ViralCapsid ProteinsWinter seasonInfection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases
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