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longitudinal surveillance of rotavirus a genotypes circulating in a high milk yield dairy cattle herd after the introduction of a rotavirus vaccine.worldwide, neonatal diarrhea is one of the most important health issues affecting dairy calves, and rotavirus a (rva) is one of its primary causes. among the measures to mitigate the risk of diarrhea outbreaks, cow vaccination stands out as one of the most important. however, the immune pressure resulting from routine vaccination may be able to select specific g and p genotypes in rva field strains. this study aimed to determine the frequency and intensity of neonatal diarrhea and the incidence ...201930827398
cross-sectional study of the g and p genotypes of rotavirus a field strains circulating in regularly vaccinated dairy cattle herds.neonatal diarrhea is the main cause of morbidity and mortality in calves up to 30 days old, and rotavirus a (rva) is the main viral etiology. rva vaccines are one of the main tools for diarrhea control in neonates. the aim of this cross-sectional study was to monitor by rt-pcr the g and p genotypes of rva strains identified in dairy cattle herds regularly vaccinated with the rva uk strain (g6p[5]). of the 14 randomly selected herds, two were excluded because no calf was diagnosed with diarrhea o ...201930535644
discovery and prevalence of divergent rna viruses in european field voles and rabbits.the advent of unbiased metagenomic virus discovery has revolutionized studies of virus biodiversity and evolution. despite this, our knowledge of the virosphere, including in mammalian species, remains limited. we used unbiased metagenomic sequencing to identify rna viruses in european field voles and rabbits. accordingly, we identified a number of novel rna viruses including astrovirus, rotavirus a, picorna-like virus and a morbilli-like paramyxovirus. in addition, we identified a sobemovirus a ...201931906044
prevalence and genomic characteristics of a novel reassortment mammalian orthoreovirus type 2 in diarrhea piglets in sichuan, china.mammalian orthoreovirus (mrv), which can infect almost all mammals, is a zoonotic virus. in this study, six strains of type 2 mrv (mrv2) were isolated from 7 diarrhea piglets from a farm that had an outbreak of diarrhea in piglets in 2018, which tested negative for porcine epidemic diarrhea virus (pedv), porcine transmissible gastroenteritis virus (tgev), porcine deltacoronavirus (pdcov), and porcine group a rotavirus (rav). the mrv2 isolate infected neonatal piglets, in which it induced severe ...202032544614
distantly related rotaviruses in common shrews, germany, 2004-2014.we screened samples from common shrews (sorex araneus) collected in germany during 2004-2014 and identified 3 genetically divergent rotaviruses. virus protein 6 sequence similarities to prototype rotaviruses were low (64.5% rotavirus a, 50.1% rotavirus c [tentative species k], 48.2% rotavirus h [tentative species l]). shrew-associated rotaviruses might have zoonotic potential.201931742508
first experimental proof of rotavirus a (rva) genotype g18p[17] inducing the clinical presentation of 'young pigeon disease syndrome' (ypds) in domestic pigeons (columba livia).young pigeon disease syndrome (ypds) is characterized as a seasonally occurring, acute and primarily enteric medical condition of mainly juvenile domestic pigeons (columba livia) with highly variable mortality reaching more than 50%. although the syndrome has been known in europe for almost three decades, its aetiology remains largely obscure. recently, a previously unknown pigeon-associated clade of rotavirus a (rva) genotype g18p[17] was detected in europe and australia in association with fat ...202031967734
rotavirus a associated with clinical disease and hepatic necrosis in california pigeons (columba livia domestica).retrospective analysis of pigeon necropsy submissions to the california animal health and food safety laboratory system from 2000 to 2018 revealed 14 submissions diagnosed with rotavirus a hepatic necrosis or "reoviruslike" viral hepatitis. nine of the 14 submissions (64%) occurred in 2018. submissions were racing pigeons and squab breeders from flocks with increased mortality. juvenile and adult pigeons were submitted with a history of depression, diarrhea, regurgitation, labored breathing, and ...201931865680
detection of pathogenic viruses, pathogen indicators, and fecal-source markers within tanker water and their sources in the kathmandu valley, nepal.tanker water is used extensively for drinking as well as domestic purposes in the kathmandu valley of nepal. this study aimed to investigate water quality in terms of microbial contamination and determine sources of fecal pollution within these waters. thirty-one samples from 17 tanker filling stations (tfss) and 30 water tanker (wt) samples were collected during the dry and wet seasons of 2016. escherichia coli was detected in 52% of the 31 tfs samples and even more frequently in wt samples. of ...201931248180
the racing pigeon (columba livia domestica) industry in victoria, australia, and epidemiology of a novel group a rotavirus outbreak.a novel group a rotavirus, first identified clinically in racing, feral and fancy pigeons in western australia, had spread throughout australia by march 2017. in december 2016, the putative index case of rotavirus in racing pigeons in the state of victoria was confirmed at a regional bird sale, with rapid spread to peri-urban melbourne, the capital city. a survey sent to approximately 400 victorian pigeon fanciers identified eight (of 85 respondents) with a confirmed rotavirus infection in their ...201931140207
pigeon rotavirus a genotype g18p17-associated disease outbreaks after fancy pigeon shows in germany - a case series.pigeon rotavirus a (rva) isolates of genotype g18p[17] are causing disease outbreaks and fatalities in pigeon lofts in australia, germany, belgium, denmark and usa since 2016. most disease outbreaks have been reported from juvenile pigeons (columba livia forma domestica). however, reports on rva-associated disease outbreaks in fancy pigeons in connection with fancy pigeon shows in germany are rare.202133588462
kobuvirus detection in the critically endangered pygmy hog (porcula salvania), india.pygmy hogs (porcula salvania) are the smallest and rarest wild suid. it is categorized as a critically endangered species as per the red list of the international union for conservation of nature. this study reports the first detection of a single-stranded rna virus species, aichivirus c, belonging to the genus kobuvirus (kobv) and the family picornaviridae, in pygmy hogs. kobv species are identified as a cause of acute gastroenteritis among children in india. as of now, there exists no report o ...202133827197
presence and diversity of different enteric viruses in wild norway rats (rattus norvegicus).rodents are common reservoirs for numerous zoonotic pathogens, but knowledge about diversity of pathogens in rodents is still limited. here, we investigated the occurrence and genetic diversity of enteric viruses in 51 norway rats collected in three different countries in europe. rna of at least one virus was detected in the intestine of 49 of 51 animals. astrovirus rna was detected in 46 animals, mostly of rat astroviruses. human astrovirus (hastv-8) rna was detected in one, rotavirus group a ( ...202134073462
rotavirus a infection in pre- and post-vaccine period: risk factors, genotypes distribution by vaccination status and age of children in nampula province, northern mozambique (2015-2019).mozambique introduced the monovalent rotavirus vaccine (rotarix®, gsk biologicals, rixensart, belgium) in september 2015. previous analysis, showed that nampula province continues reporting a high frequency of rotavirus a (rva) infection and the emergence of g9p[6], g9p[4] and g3p[4] genotypes. this analysis aimed to determine the rva frequency; risk factors; genotype distribution by vaccination status and age between pre- and post-vaccine periods in children under-five years old with diarrhea i ...202134358275
molecular detection of human adenovirus and rotavirus in feces of white-eared opossums.the white-eared opossums (didelphis albiventris) is the largest brazilian marsupial and a great example of animal synanthropy. considering the high potential as a carrier of viruses originating from environmental contamination, the presence of human adenovirus (adv) and rotavirus was investigated in the feces of rescued white-eared opossums, which were in the process of rehabilitation. the feces of 49 animals were initially investigated by immunochromatography, with three samples positive for ad ...202033236325
a reassortant g3p12 rotavirus a strain associated with severe enteritis in donkeys (equus asinus).in contrast to horses, the only evidence suggesting gastrointestinal disease in neonatal donkeys is associated with group a rotaviruses (rvas) is the detection of viral antigens by elisa in just 1 of 82 symptomatic donkey foals. no additional, more comprehensive investigations have been conducted, and rvas if circulating in donkey populations have not been molecularly characterised.202133455000
enteric viral infections among domesticated south american camelids: first detection of mammalian orthoreovirus in camelids.enteric infections are a major cause of neonatal death in south american camelids (sacs). the aim of this study was to determine the prevalence of enteric viral pathogens among alpacas and llamas in canchis, cuzco, located in the southern peruvian highland. fecal samples were obtained from 80 neonatal alpacas and llamas and tested for coronavirus (cov), mammalian orthoreovirus (mrv), and rotavirus a (rva) by rt-pcr. of the 80 fecal samples analyzed, 76 (95%) were positive for at least one of the ...202134069466
molecular characterization of group a rotavirus strains detected in alpacas (vicugna pacos) from peru.the alpaca is a very important social and economic resource for the production of fibre and meat for andean communities. peru is the main producer of alpacas. group a rotavirus (rva) has been sporadically detected in alpacas. in this study, a total of 1423 faecal samples from alpacas from different locations of the puno department in peru were collected and analysed by an antigen-capture elisa in order to detect rva. four per cent of the samples were rva-positive (57/1423). the genotype constell ...202133830912
a remarkable genetic diversity of rotavirus a circulating in red fox population in croatia.rotaviruses (rv), especially rotavirus a (rva), are globally recognized as pathogens causing neonatal diarrhea, but they also affect intensive animal farming. however, the knowledge on their significance in wildlife is rather limited. the aim of the study was to unveil the prevalence, molecular epidemiology, and genetic diversity of rva strains circulating in the red fox (vulpes vulpes) population in croatia. from 2018 to 2019, 370 fecal samples from fox carcasses hunted for rabies monitoring we ...202133923799
a novel group a rotavirus associated with acute illness and hepatic necrosis in pigeons (columba livia), in australia.cases of vomiting and diarrhoea were reported in racing pigeons in western australia in may, 2016. morbidity and mortality rates were high. similar clinical disease was seen in victoria in december and by early 2017 had been reported in all states except the northern territory, in different classes of domestic pigeon-racing, fancy and meat bird-and in a flock of feral pigeons. autopsy findings were frequently unremarkable; histological examination demonstrated significant hepatic necrosis as the ...201830204797
genome constellations of rotavirus a isolated from avian species in brazil, 2008-2015.rotaviruses are members of the family reoviridae and are a common cause of acute diarrhea in many mammalian and avian species. they are non-enveloped icosahedral particles and their genome comprises 11 segments of double-stranded rna, which encodes six structural proteins (vp1-4, vp6-7) and six nonstructural proteins (nsp1-6). genotypes are defined based upon the diversity found in these genes and viral characterization plays a central role on epidemiological studies and prevention. here we inve ...202032378061
sensitive sybr green-real time pcr for the detection and quantitation of avian rotavirus a.avian rotavirus a (artv-a) is a virus that affects young birds, causing acute diarrhea and economic losses in the poultry industry worldwide. the techniques used for the diagnosis of artv-a include electron microscopy, isolation in cell culture, and serology, as well as molecular techniques, such as the reverse transcription-polymerase chain reaction (rt-pcr). the objective of this work was to standardize a real-time rt-polymerase chain reaction (rt-qpcr) using sybr green chemistry for the rapid ...201830597964
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