Shigeru Tajima

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Sixty-two new Japanese encephalitis virus (JEV) isolates were obtained from mosquitoes, biting midges, human cerebrospinal fluid and human blood samples in China during 2002-2005. The E and prM genes were sequenced and phylogenetic analyses were performed with 38 JEV other isolates from China and 36 JEV strains from other countries. Phylogenetic trees based(More)
The inverted pendulum is frequently used as a starting point for discussions of how human balance is maintained during standing and locomotion. Here we examine three experimental paradigms of time-delayed balance control: (1) mechanical inverted time-delayed pendulum, (2) stick balancing at the fingertip, and (3) human postural sway during quiet standing.(More)
This paper describes a system that allows users who obtain a "wearable ID key" to personalize dynamically ubiquitous computers by simply touching them. We call the concept of providing personalized service by touch "Active Personalization". For active personalization, users only have to wear a digital key and do not have to carry around other computers.(More)
To characterize Japanese encephalitis virus (JEV) strains recently prevalent in Japan, JEV surveillance was performed in pigs from 2002 to 2004. Eleven new JEV isolates were obtained and compared with previous isolates from Japan and other Asian countries. All of the isolates were classified into genotype 1 by nucleotide sequence analysis of the E gene. Two(More)
The reemergence of dengue virus (DENV) infection has created a requirement for improved laboratory diagnostic procedures. In this study, DENV genome detection in urine was evaluated as a diagnostic method. The DENV genome was detected by real-time reverse transcriptase PCR (RT-PCR) in urine and serum of dengue patients. The detection rate of DENV genome in(More)
BACKGROUND Molecular epidemiology of dengue viruses in endemic countries have been reported, but few were reported on the imported dengue cases among travelers. We analyzed dengue viruses isolated from imported dengue cases in Japan who were infected while traveling in endemic regions of the world. METHOD We sequenced the complete envelope (E) gene of 33(More)
Yokose virus (strain Oita-36) was isolated from the bat in Japan in 1971. In the present study, we determined complete nucleotide sequences of Yokose virus using RT-PCR and RACE techniques. Yokose virus genome consists of 10,857 nucleotides in length (accession no. AB114858), containing a single open reading frame (3425 amino acids) encoding 11 viral(More)
The nonstructural protein 1 (NS1) of flavivirus has two N-glycosylation sites that are thought to be important for viral replication. Effects of NS1 glycosylation site mutations on viral replication have been reported in several flaviviruses, but the results have differed. In this report, we examined the role of glycosylation site of NS1 on the replication(More)
Bovine leukemia virus (BLV) is the etiologic agent of enzootic bovine leukosis. We previously identified several mutants of the BLV Tax protein with an ability to transactivate transcription via the BLV enhancer that is significantly greater than that of the wild-type Tax protein. Moreover, the mutant proteins also activated other viral enhancers, such as(More)