Analysis of human and swine hepatitis E virus (HEV) isolates of genotype 3 in Japan that are only 81-83% similar to reported HEV isolates of the same genotype over the entire genome

被引:28
作者
Inoue, Jun
Takahashi, Masaharu
Ito, Keiichi
Shimosegawa, Tooru
Okamoto, Hiroaki [1 ]
机构
[1] Jichi Med Sch, Dept Infect & Immun, Div Virol, Tochigi 3290498, Japan
[2] Tohoku Univ, Grad Sch Med, Div Gastroenterol, Sendai, Miyagi 9808574, Japan
[3] Mie Univ, Sch Med, Dept Internal Med 1, Tsu, Mie 5148507, Japan
关键词
D O I
10.1099/vir.0.81912-0
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Full-length sequences were determined for a human hepatitis E virus (HEV) isolate (HE-JA04-1911) and two swine HEV isolates (swJ8-6 and swJ12-4) that belong to one of three clusters within genotype 3 in Japan and are close to Spanish isolates according to their partial sequences. The three HEV isolates were 89.7-92.9% identical to each other, but only 80.7-83.0% similar to 21 HEV strains of the same genotype isolated in Canada, Kyrgyzstan, the USA and Japan over their entire genome. On comparison with HEV isolates whose partial sequence is known, the HE-JA04-1911, swJ8-5 and swJ12-4 isolates segregated into a phylogenetic cluster consisting of human and swine HEV isolates in Japan and the UK, with identities of 89.8-100% and 87.9-92.4%, respectively. Genotype 3 HEV isolates were found to be markedly heterogeneous. The UK-isolate-like HEV strains in Japan may have originated from the UK via the importation of pigs since 1900.
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页码:2363 / 2369
页数:7
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