Molecular epidemiology of rotaviruses among healthy calves in Japan: Isolation of a novel bovine rotavirus bearing new P and G genotypes

Abe, Masako; Ito, Naoto; Morikawa, Shigeki; Takasu, Masaki; Murase, Tetsuma; Kawashima, Takanori; Kawai, Yoshihiro; Kohara, Junko; Sugiyama, Makoto

doi:10.1016/j.virusres.2009.05.005

Cited by 75 publications

(87 citation statements)

References 64 publications

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“…To understand the ecology of rotaviruses in nature, we have examined cattle and wild animals for rotavirus infection since 2006 in Japan (Abe et al, 2009(Abe et al, , 2010. During this survey, the AzuK-1 (G21P [29]) strain was identified as a bovine rotavirus belonging to new G and P genotypes.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, we isolated a novel bovine rotavirus, the AzuK-1 strain, belonging to G21P [29] genotypes from an asymptomatic calf (Abe et al, 2009). In addition, our data indicated that G21P [29] rotaviruses can be considered to be endemic in the cattle population in Japan over the past decade and would have escaped detection due to their low pathogenicity in cattle.…”

Section: Introductionmentioning

confidence: 92%

“…We previously reported that G21P[29] rotaviruses have been widely prevalent among cattle in Japan for over 10 years (Abe et al, 2009 (Table 1), the possibility of involvement of some gene segments other than VP4 and VP7 in efficiency of transmission cannot be excluded.…”

Section: Complete Genome Sequencing Of New Bovine Rotavirusesmentioning

confidence: 99%

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Whole genome characterization of new bovine rotavirus G21P[29] and G24P[33] strains provides evidence for interspecies transmission

Abe

Ito

Masatani

et al. 2011

Journal of General Virology

134

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We have reported a novel bovine rotavirus, the AzuK-1 (G21P [29]) strain, isolated from an asymptomatic calf. We isolated another bovine rotavirus, the Dai-10 strain, bearing new G24P [33] genotypes, assigned by the Rotavirus Classification Working Group (RCWG), from an asymptomatic cow in Hyogo Prefecture, Japan in 2007. To gain an insight into the origins and evolution of these strains, we determined the complete ORF sequences of all 11 genes of the two strains. The NSP3 genes of both strains were confirmed to belong to a new NSP3 genotype, T9, by the RCWG. Genotype determination of AzuK-1 and Dai-10 strains revealed that eight gene segments of both strains possessed genotypes typically observed in bovine rotaviruses, with the exception of VP4, VP7 and NSP3 gene segments. Unexpectedly, phylogenetic analyses showed that VP6 and NSP2 gene segments of the AzuK-1 and Dai-10 strains were clustered with those of simian or canine/feline rotaviruses, rather than with those of bovine rotaviruses. These findings indicate the possibility that both strains originated by interspecies transmission and multiple reassortment events involving bovine, simian and canine/feline rotaviruses, resulting in the introduction of some genes into the genetic background of bovine rotaviruses. INTRODUCTIONGroup A rotaviruses are the major pathogens causing acute gastroenteritis in infants and a wide range of animals, including birds. Rotavirus-induced diarrhoea is a serious public health problem worldwide, responsible for more than 600 000 child deaths each year (Parashar et al., 2006). Likewise, in domestic animals, rotavirus-induced diarrhoea is a major problem causing significant economic losses (Dhama et al., 2009;Martella et al., 2010).Rotaviruses are members of the family Reoviridae. Rotaviruses possess a genome of 11 segments of dsRNA, which encode six viral structural proteins (VP1-VP4, VP6 and VP7) and six non-structural proteins (NSP1-NSP6). Because of the segmented nature of the genome, a reassortment event can occur in cells co-infected with two or more different strains (Estes & Kapikian, 2007;Palombo, 2002;Ramig, 1997). The rotavirus virion is a triple-layered icosahedral particle. The outer capsid is composed of VP7 and VP4. They elicit neutralizing antibodies independently. In a dual classification system, rotaviruses are classified into 24 G genotypes and 32 P genotypes based on the nucleotide sequences of VP7 and VP4 genes, respectively (Collins et al., 2010; Esona et al., 2010;Matthijnssens et al., 2006Matthijnssens et al., , 2008a Schumann et al., 2009; Solberg et al., 2009;Ursu et al., 2009). Recently, a new classification system has been established using nucleotide sequences of all of the 11 genomic RNA segments by the Rotavirus Classification Working Group (RCWG) (Matthijnssens et al., 2008b). In this system, the The GenBank/EMBL/DDBJ accession numbers for the sequences reported in this paper are AB513836-AB513838 and AB573070-AB573086.Supplementary material is available with the online version of this paper. , 2...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

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Whole genome characterization of new bovine rotavirus G21P[29] and G24P[33] strains provides evidence for interspecies transmission

Abe

Ito

Masatani

et al. 2011

Journal of General Virology

134

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“…The system differentiates G-types (VP7-specific, G for glycoprotein) and P-types (VP4-specific, P for protease-sensitive protein). To date, 23 different G-types and 31 P-types have been described [5][6][7][8][9], indicating extensive genomic diversity within group A rotaviruses.…”

Section: Introductionmentioning

confidence: 99%

Rotavirus genotypes co-circulating in Europe between 2006 and 2009 as determined by EuroRotaNet, a pan-European collaborative strain surveillance network

Iturriza‐Gómara¹,

Dallman²,

Bányai³

et al. 2010

Epidemiol. Infect.

207

254

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SUMMARYEuroRotaNet, a laboratory network, was established in order to determine the diversity of co-circulating rotavirus strains in Europe over three or more rotavirus seasons from 2006/2007 and currently includes 16 countries. This report highlights the tremendous diversity of rotavirus strains co-circulating in the European population during three years of surveillance since 2006/ 2007 and points to the possible origins of these strains including genetic reassortment and interspecies transmission. Furthermore, the ability of the network to identify strains circulating with an incidence of o1% allowed the identification of possible emerging strains such as G8 and G12 since the beginning of the study ; analysis of recent data indicates their increased incidence.

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“…The numbers of the rotavirus-associated mortality were estimated to be 453000 in 2008 [1,2]. The numbers of deaths were particularly high in the developing countries [3]. Even in the developed countries, rotavirus remains an important cause of morbidity.…”

Section: Introductionmentioning

confidence: 99%

Prokaryotic Expression of VP7 Gene and Subunit Vaccine Preparation of Bovine Rotavirus

Sang¹,

Ma²,

T³

2015

IJVR

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Molecular epidemiology of rotaviruses among healthy calves in Japan: Isolation of a novel bovine rotavirus bearing new P and G genotypes

Cited by 75 publications

References 64 publications

Whole genome characterization of new bovine rotavirus G21P[29] and G24P[33] strains provides evidence for interspecies transmission

Whole genome characterization of new bovine rotavirus G21P[29] and G24P[33] strains provides evidence for interspecies transmission

Rotavirus genotypes co-circulating in Europe between 2006 and 2009 as determined by EuroRotaNet, a pan-European collaborative strain surveillance network

Prokaryotic Expression of VP7 Gene and Subunit Vaccine Preparation of Bovine Rotavirus

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