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https://www.readbyqxmd.com/read/28636465/evaluation-of-the-xpert-norovirus-assay-for-the-rapid-detection-of-norovirus-genogroups-i-and-ii-in-faecal-specimens-within-a-routine-laboratory-setting
#1
Oliver Cleary, Rose McNerney, Zoe Yandle, Cathal E O'Sullivan
No abstract text is available yet for this article.
February 10, 2017: British Journal of Biomedical Science
https://www.readbyqxmd.com/read/28633888/burden-of-acute-gastroenteritis-caused-by-norovirus-in-china-a-systematic-review
#2
Hong-Lu Zhou, Shan-Shan Zhen, Jin-Xia Wang, Can-Jing Zhang, Chao Qiu, Song-Mei Wang, Xi Jiang, Xuan-Yi Wang
BACKGROUND: To understand the epidemiology and disease burden of norovirus (NoVs) gastroenteritis in China, a systematic review was conducted. METHODS: Studies on acute gastroenteritis (AGE) caused by NoVs from mainland China, published before 2017 were searched. All retrieved articles were screened and reviewed by a standardized algorithm. NoVs detection rates as well as strain variations by ages, seasonal variations and geographic locations were analyzed using random-effects model...
June 17, 2017: Journal of Infection
https://www.readbyqxmd.com/read/28628440/norovirus-gii-17-as-major-epidemic-strain-in-italy-winter-2015-16
#3
Giovanni Maurizio Giammanco, Simona De Grazia, Floriana Bonura, Vincenzo Cappa, Sara Li Muli, Arcangelo Pepe, Maria Cristina Medici, Fabio Tummolo, Adriana Calderaro, Francesca Di Bernardo, Piera Dones, Anna Morea, Daniela Loconsole, Cristiana Catella, Valentina Terio, Krisztiàn Bànyai, Maria Chironna, Vito Martella
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.
July 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28619170/seroprevalence-for-norovirus-genogroup-ii-iv-and-vi-in-dogs
#4
Barbara Di Martino, Federica Di Profio, Irene Melegari, Vittorio Sarchese, Ivano Massirio, Giuseppe Palermo, Giovanni Romito, Eleonora Lorusso, Gianvito Lanave, Livia Bodnar, Canio Buonavoglia, Fulvio Marsilio, Kim Y Green, Vito Martella
Molecular and serological data suggest that noroviruses (NoVs) might be transmitted between humans and domestic carnivores. In this study we screened an age-stratified collection of canine sera (n=516) by using an ELISA assay based on virus-like particles (VLPs) of human NoVs GII.4 and GIV.1 and carnivore NoVs GIV.2 and GVI.2. Antibodies against GII.4 and GIV.1 human NoVs and GIV.2 and GVI.2 NoVs from carnivores were identified in dog sera (13.0%, 67/516) suggesting their exposure to homologous and heterologous NoVs...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28618751/frequency-and-molecular-characterization-of-human-norovirus-in-erzurum-turkey
#5
Mehmet Özkan Timurkan, Hakan Aydin, Osman Aktaş
BACKGROUND/AIM: There are limited studies on genotyping and phylogenetic analysis of norovirus in Turkey, and this has not previously been studied in the Eastern Anatolia region. The aim of the present study was to determine the norovirus profile in this region with genotyping and phylogenetic analysis. MATERIALS AND METHODS: Included in the study were stool samples obtained from 427 people from different age groups in Eastern Anatolia. The nucleic acid samples isolated by the automatic system and nucleic acid sequence reactions and phylogenetic analyses were performed on RNA samples...
June 12, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28618661/probabilistic-quantitative-microbial-risk-assessment-model-of-norovirus-from-wastewater-irrigated-vegetables-in-ghana-using-genome-copies-and-fecal-indicator-ratio-conversion-for-estimating-exposure-dose
#6
Emmanuel de-Graft Johnson Owusu-Ansah, Angelina Sampson, Samuel K Amponsah, Robert C Abaidoo, Anders Dalsgaard, Tine Hald
The need to replace the commonly applied fecal indicator conversions ratio (an assumption of 1:10(-5) virus to fecal indicator organism) in Quantitative Microbial Risk Assessment (QMRA) with models based on quantitative data on the virus of interest has gained prominence due to the different physical and environmental factors that might influence the reliability of using indicator organisms in microbial risk assessment. The challenges facing analytical studies on virus enumeration (genome copies or particles) have contributed to the already existing lack of data in QMRA modelling...
June 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28616834/minimizing-bias-in-virally-seeded-water-treatment-studies-evaluation-of-optimal-bacteriophage-and-mammalian-virus-preparation-methodologies
#7
Nathan Dunkin, ShihChi Weng, Joseph G Jacangelo, Kellogg J Schwab
One key assumption impacting data quality in viral inactivation studies is that reduction estimates are not altered by the virus seeding process. However, seeding viruses often involves the inadvertent addition of co-constituents such as cell culture components or additives used during preparation steps which can impact viral reduction estimates by inducing non-representative oxidant demand in disinfection studies and fouling in membrane assessments. The objective of this study was therefore to characterize a mammalian norovirus surrogate, murine norovirus (MNV), and bacteriophage MS2 at sequential stages of viral purification and to quantify their potential contribution to artificial oxidant demand and non-representative membrane fouling...
June 14, 2017: Food and Environmental Virology
https://www.readbyqxmd.com/read/28608808/drivers-of-microbial-risk-for-direct-potable-reuse-and-de-facto-reuse-treatment-schemes-the-impacts-of-source-water-quality-and-blending
#8
Rabia M Chaudhry, Kerry A Hamilton, Charles N Haas, Kara L Nelson
Although reclaimed water for potable applications has many potential benefits, it poses concerns for chemical and microbial risks to consumers. We present a quantitative microbial risk assessment (QMRA) Monte Carlo framework to compare a de facto water reuse scenario (treated wastewater-impacted surface water) with four hypothetical Direct Potable Reuse (DPR) scenarios for Norovirus, Cryptosporidium, and Salmonella. Consumer microbial risks of surface source water quality (impacted by 0-100% treated wastewater effluent) were assessed...
June 13, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28604828/genotype-diversity-and-molecular-evolution-of-noroviruses-a-30-year-1982-2011-comprehensive-study-with-children-from-northern-brazil
#9
Jones Anderson Monteiro Siqueira, Renato da Silva Bandeira, Darleise de Souza Oliveira, Liann Filiphe Pereira Dos Santos, Yvone Benchimol Gabbay
A chronologically comprehensive 30-year study was conducted that involved children living in Belém, in the Amazon region of Northern Brazil, who participated in eight different studies from October 1982 to April 2011. The children were followed either in the community or in health units and hospitals in order to identify the norovirus genotypes involved in infections during this time. A total of 2,520 fecal specimens were obtained and subjected to RT-PCR and nucleotide sequencing for regions A, B, C, D and P2 of the viral genome...
2017: PloS One
https://www.readbyqxmd.com/read/28603022/variation-analysis-of-norovirus-among-children-with-diarrhea-in-rural-hebei-province-north-of-china
#10
Niu Qiao, Song-Mei Wang, Jin-Xia Wang, Bin Kang, Shan-Shan Zhen, Xin-Jiang Zhang, Zhi-Yong Hao, Jing-Chen Ma, Chao Qiu, Yu-Liang Zhao, Lei Liu, Xuan-Yi Wang
To understand the distribution of genotyping, as well as evolution of norovirus circulating among children<5yrs., a population-based diarrhea surveillance targeted children<5yrs. was conducted in rural Zhengding County, Hebei Province, China between October 2011 and March 2012. RT-PCR was used to amplify the capsid-encoding region of GI and GII norovirus to identify norovirus infection. All PCR products were sequenced and analyzed for genotyping and constructing phylogenetic tree. Dynamic distribution network was constructed by TempNet to illustrate the genetic relationships at two different time points...
June 7, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28600317/efficacy-of-neutral-electrolyzed-water-for-inactivation-of-human-norovirus
#11
Eric Moorman, Naim Montazeri, Lee-Ann Jaykus
Human norovirus (NoV) is the leading cause of acute gastroenteritis worldwide. Persistence on surfaces and resistance to many conventional disinfectants contribute to widespread transmission of norovirus. We examined the efficacy of neutral electrolyzed water (NEW, pH 7) for inactivation of human NoV GII.4 Sydney in suspension (ASTM method 1052-11) and on stainless steel surfaces (ASTM method 1053-11), with and without an additional soil load. The impact of the disinfectant on viral capsid was assessed using RT-qPCR preceded with an RNase pre-treatment as well as by SDS-PAGE, transmission electron microscopy, and histo-blood group antigen (HBGA) receptor-binding assay...
June 9, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28594609/next-generation-sequencing-analysis-of-the-diversity-of-human-noroviruses-in-japanese-oysters
#12
Saiki Imamura, Hiromi Kanezashi, Tomoko Goshima, Mika Haruna, Tsukasa Okada, Nobuya Inagaki, Masashi Uema, Mamoru Noda, Keiko Akimoto
To obtain detailed information on the diversity of infectious norovirus in oysters (Crossostrea gigas), oysters obtained from fish producers at six different sites (sites A, B, C, D, E, and F) in Japan were analyzed once a month during the period spanning October 2015-February 2016. To avoid false-positive polymerase chain reaction (PCR) results derived from noninfectious virus particles, samples were pretreated with RNase before reverse transcription-PCR (RT-PCR). RT-PCR products were subjected to next-generation sequencing to identify norovirus genotypes in oysters...
June 8, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28594572/effect-of-high-pressure-processing-on-human-noroviruses-in-laboratory-contaminated-oysters-by-bio-accumulation
#13
Saiki Imamura, Hiromi Kanezashi, Tomoko Goshima, Atsushi Suto, You Ueki, Naoko Sugawara, Hiroshi Ito, Bizhen Zou, Masashi Uema, Mamoru Noda, Keiko Akimoto
The contamination of oysters with human noroviruses poses a human health risk, since oysters are often consumed raw. In this study, human norovirus genogroup II was allowed to bio-accumulate in oysters, and then the effect of high-pressure processing (HPP) on human noroviruses in oysters was determined through a polymerase chain reaction (PCR)-based method with enzymatic pretreatment to distinguish infectious noroviruses. As a result, oysters could be artificially contaminated to a detectable level of norovirus genome by the reverse transcription-PCR...
June 8, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28591681/structural-features-of-glycan-recognition-among-viral-pathogens
#14
REVIEW
Sreejesh Shanker, Liya Hu, Sasirekha Ramani, Robert L Atmar, Mary K Estes, B V Venkataram Prasad
Recognition and binding to host glycans present on cellular surfaces is an initial and critical step in viral entry. Diverse families of host glycans such as histo-blood group antigens, sialoglycans and glycosaminoglycans are recognized by viruses. Glycan binding determines virus-host specificity, tissue tropism, pathogenesis and potential for interspecies transmission. Viruses including noroviruses, rotaviruses, enteroviruses, influenza, and papillomaviruses have evolved novel strategies to bind specific glycans often in a strain-specific manner...
June 4, 2017: Current Opinion in Structural Biology
https://www.readbyqxmd.com/read/28591398/high-prevalence-of-norovirus-in-children-with-sporadic-acute-gastroenteritis-in-manaus-amazon-region-northern-brazil
#15
Samya Thalita Picanço da Costa, Tulio Machado Fumian, Ian Carlos Gomes de Lima, Jones Anderson Monteiro Siqueira, Luciana Damascena da Silva, Juliana das Mercês Hernández, Maria Silvia Souza de Lucena, Tammy Kathlyn Amaral Reymão, Luana da Silva Soares, Joana D'Arc Pereira Mascarenhas, Yvone Benchimol Gabbay
BACKGROUND: Norovirus (NoV) is a major cause of acute gastroenteritis (AGE) worldwide, especially in children under five years. Studies involving the detection and molecular characterisation of NoV have been performed in Brazil, demonstrating its importance as an etiological agent of AGE. OBJECTIVES: The objectives of this study were to investigate the frequency of human NoV and to genotype the strains isolated from 0-14-year-old patients of AGE in Manaus, Brazil, over a period of two years...
June 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28588843/bilateral-hydronephrosis-due-to-obstructive-ureteral-stone-associated-with-norovirus-gastroenteritis
#16
Fumihiro Ochi, Kenji Furuno, Pin Fee Chong, Junichiro Tezuka, Yumi Mizuno, Tomonobu Aoki, Eiichi Ishii
Recently, cases of urinary tract calculi causing hydronephrosis and postrenal renal failure associated with viral gastroenteritis were documented, yet few were related to norovirus. During norovirus gastroenteritis, observation of oliguria, aciduria, low FENa value, and elevation of blood or urinary uric acid level may necessitate clinical workout for nephrolithiasis.
June 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28585917/recombinant-gii-p16-gii-2-norovirus-taiwan-2016
#17
Luke Tzu-Chi Liu, Ting-Yu Kuo, Ching-Yi Wu, Wan-Ting Liao, Aron J Hall, Fang-Tzy Wu
In Taiwan, acute gastroenteritis outbreaks caused by a new norovirus genotype GII.2 increased sharply toward the end of 2016. Unlike previous outbreaks, which often involved restaurants, GII.2 outbreaks mainly occurred in schools. Phylogenetic analysis indicates that these noroviruses are recombinant GII.P16-GII.2 strains.
July 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28579015/erratum-to-an-outbreak-of-acute-norovirus-gastroenteritis-in-a-boarding-school-in-zamora-spain-enferm-infecc-microbiol-clin-2017-35-4-264-5
#18
Míriam Albert-Hernández, Isabel Martínez-Pino, Juan Emilio Antón-Rueda, M Fe Brezmes-Valdivieso
No abstract text is available yet for this article.
May 31, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28576363/effect-of-green-tea-extract-on-enteric-viruses-and-its-application-as-natural-sanitizer
#19
W Randazzo, I Falcó, R Aznar, G Sánchez
In this work, the effect of green tea extract (GTE) was assessed against murine norovirus (MNV) and hepatitis A virus (HAV) at different temperatures, exposure times and pH conditions. Initially, GTE at 0.5 and 5 mg/ml were individually mixed with each virus at 5 log TCID50/ml and incubated 2 h at 37 °C at different pHs (from 5.5 to 8.5). GTE affected both viruses depending on pH with higher reductions observed in alkaline conditions. Secondly, different concentrations of GTE (0.5 and 5 mg/ml) were mixed with viral suspensions and incubated for 2 or 16 h at 4, 25 and 37 °C at pH 7...
September 2017: Food Microbiology
https://www.readbyqxmd.com/read/28558279/incidence-of-gastrointestinal-illness-following-wet-weather-recreational-exposures-harmonization-of-quantitative-microbial-risk-assessment-with-an-epidemiologic-investigation-of-surfers
#20
Jeffrey A Soller, Mary Schoen, Joshua A Steele, John F Griffith, Kenneth C Schiff
We modeled the risk of gastrointestinal (GI) illness associated with recreational exposures to marine water following storm events in San Diego County, California. We estimated GI illness risks via quantitative microbial risk assessment (QMRA) techniques by consolidating site specific pathogen monitoring data of stormwater, site specific dilution estimates, literature-based water ingestion data, and literature based pathogen dose-response and morbidity information. Our water quality results indicated that human sources of contamination contribute viral and bacterial pathogens to streams draining an urban watershed during wet weather that then enter the ocean and affect nearshore water quality...
May 13, 2017: Water Research
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