Sequence analysis of vietnamese P[6] rotavirus strains suggests evidence of interspecies transmission

• Published in: Journal of medical virology 2007-12, Vol.79 (12), p.1959-1965
• Main Authors: Nguyen, Tuan Anh, Khamrin, Pattara, Trinh, Quang Duy, Phan, Tung Gia, Pham, Le Duc, Hoang, Le Phuc, Hoang, Kim Trong, Yagyu, Fumihiro, Okitsu, Shoko, Ushijima, Hiroshi
• Format: Article
• Language: English
• Subjects: Animals; Antigens, Viral - genetics; Biological and medical sciences; Capsid Proteins - genetics; Fundamental and applied biological sciences. Psychology; Human rotavirus; Human viral diseases; Humans; Infectious diseases; interspecies transmission; Medical sciences; Microbiology; Miscellaneous; Phylogeny; Porcine rotavirus; RNA-Binding Proteins - genetics; rotavirus; Rotavirus - classification; Rotavirus - genetics; Rotavirus - physiology; Rotavirus Infections - epidemiology; Rotavirus Infections - transmission; Rotavirus Infections - virology; Swine; Vietnam - epidemiology; Viral diseases; Viral Nonstructural Proteins - genetics; Virology
• ISSN: 0146-6615; 1096-9071
• DOI: 10.1002/jmv.21030

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. J. Med. Virol. 79:1959–1965, 2007. © 2007 Wiley‐Liss, Inc.