title: Sequence analysis of Vietnamese P[6] rotavirus strains suggests evidence of interspecies transmission.
abstract: Nucleotide and amino acid sequences of the VP8* gene of five Vietnamese P[6] rotavirus strains detected from hospitalized patients with acute gastroenteritis were analyzed and compared with other human and porcine P[6] rotaviruses. It is of interest that these strains had greatest identity with two Italian porcine rotavirus strains, 134/04-10 and 134/04-11. To our knowledge, these five Vietnamese rotaviruses are the rare P[6] rotavirus strains belonging to lineage I that cluster into sublineage Ic with porcine rotaviruses, and not into sublineage Ia, as other human P[6] rotaviruses have done so far. Sequence analysis of the VP7 gene of these P[6] rotavirus strains was also performed. The results showed that the Vietnamese G9P[6] strain had high similarity with other human G9 rotaviruses, confirming a human-animal reassortant virus, whereas other three G4P[6] strains had best identity with porcine G4 rotavirus strains, suggesting interspecies transmission of rotavirus between porcine and humans. This result provides the important data on molecular characteristics of Vietnamese rotaviruses, and highlights interspecies transmission events of rotaviruses in Vietnam as well as in Asia.
authors.affiliation: Department of Developmental Medical Sciences, Institute of International Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
authors.forename: Tuan Anh
authors.initials: TA
authors.lastname: Nguyen
authors.forename: Pattara
authors.initials: P
authors.lastname: Khamrin
authors.forename: Quang Duy
authors.initials: QD
authors.lastname: Trinh
authors.forename: Tung Gia
authors.initials: TG
authors.lastname: Phan
authors.forename: Le Duc
authors.initials: le D
authors.lastname: Pham
authors.forename: Le Phuc
authors.initials: le P
authors.lastname: Hoang
authors.forename: Kim Trong
authors.initials: KT
authors.lastname: Hoang
authors.forename: Fumihiro
authors.initials: F
authors.lastname: Yagyu
authors.forename: Shoko
authors.initials: S
authors.lastname: Okitsu
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ushijima
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000235:genetics; D036022:Capsid Proteins / Q000235:genetics; D006801:Humans; D010802:Phylogeny; D016601:RNA-Binding Proteins / Q000235:genetics; D012401:Rotavirus / Q000145:classification* / Q000235:genetics* / Q000502:physiology; D012400:Rotavirus Infections / Q000453:epidemiology / Q000635:transmission* / Q000821:virology*; D013552:Swine; D014744:Vietnam / Q000453:epidemiology; D017361:Viral Nonstructural Proteins / Q000235:genetics
chemical_list: D000956:Antigens, Viral; D036022:Capsid Proteins; D016601:RNA-Binding Proteins; C050779:VP7 protein, Rotavirus; D017361:Viral Nonstructural Proteins; C079234:NS35 protein, rotavirus