User profiles for Tomoichiro Oka

Oka Tomoichiro

国立感染症研究所
Verified email at nih.go.jp
Cited by 6746

Comprehensive review of human sapoviruses

T Oka, Q Wang, K Katayama, LJ Saif - Clinical microbiology …, 2015 - Am Soc Microbiol
Sapoviruses cause acute gastroenteritis in humans and animals. They belong to the genus
Sapovirus within the family Caliciviridae . They infect and cause disease in humans of all …

Human sapoviruses: genetic diversity, recombination, and classification

GS Hansman, T Oka, K Katayama… - Reviews in medical …, 2007 - Wiley Online Library
The family Caliciviridae contains four genera Sapovirus, Norovirus, Lagovirus and Vesivirus,
which include Sapporo virus (SaV), Norwalk virus (NoV), Rabbit hemorrhagic disease virus …

Coexistence of Multiple Genotypes, Including Newly Identified Genotypes, in Outbreaks of Gastroenteritis Due to Norovirus in Japan

…, FB Hoshino, S Kojima, R Takai, T Oka… - Journal of Clinical …, 2004 - Am Soc Microbiol
Norovirus (NV) (formerly called Norwalk-like virus) is the most common cause of acute
nonbacterial gastroenteritis in humans. Recently, we reported an NV genotyping scheme based …

Phylogenetic analysis of the complete genome of 18 Norwalk-like viruses

…, H Shirato-Horikoshi, S Kojima, T Kageyama, T Oka… - Virology, 2002 - Elsevier
“Norwalk-like viruses” (NLV), a member of the family Caliciviridae, are the major causative
agents of acute gastroenteritis and are genetically divided into two groups, genogroup I (GI) …

Detection of human sapovirus by real‐time reverse transcription‐polymerase chain reaction

T Oka, K Katayama, GS Hansman… - Journal of medical …, 2006 - Wiley Online Library
Sapovirus (SaV) is an agent of gastroenteritis for humans and swine, and is divided into five
distinct genogroups (GI–GV) based on its capsid gene sequences. Typical methods of SaV …

Norovirus infections in symptomatic and asymptomatic food handlers in Japan

K Ozawa, T Oka, N Takeda… - Journal of clinical …, 2007 - Am Soc Microbiol
Noroviruses are the leading cause of outbreaks of gastroenteritis in the world. At present,
norovirus genogroup II, genotype 4 (GII/4), strains are the most prevalent in many countries. In …

Cell culture isolation and sequence analysis of genetically diverse US porcine epidemic diarrhea virus strains including a novel strain with a large deletion in the spike …

T Oka, LJ Saif, D Marthaler, MA Esseili, T Meulia… - Veterinary …, 2014 - Elsevier
The highly contagious and deadly porcine epidemic diarrhea virus (PEDV) first appeared in
the US in April 2013. Since then the virus has spread rapidly nationwide and to Canada and …

Genetic and antigenic diversity among noroviruses

…, S Ogawa, T Oka… - Journal of General …, 2006 - microbiologyresearch.org
Human norovirus (NoV) strains cause a considerable number of outbreaks of gastroenteritis
worldwide. Based on their capsid gene (VP1) sequence, human NoV strains can be …

Antigenic relationships among porcine epidemic diarrhea virus and transmissible gastroenteritis virus strains

CM Lin, X Gao, T Oka, AN Vlasova, MA Esseili… - Journal of …, 2015 - Am Soc Microbiol
Porcine epidemic diarrhea virus (PEDV) and transmissible gastroenteritis virus (TGEV) are
economically important swine enteropathogenic coronaviruses. These two viruses belong to …

Human sapovirus classification based on complete capsid nucleotide sequences

T Oka, K Mori, N Iritani, S Harada, Y Ueki, S Iizuka… - Archives of …, 2012 - Springer
The genetically diverse sapoviruses (SaVs) are a significant cause of acute human gastroenteritis.
Human SaV surveillance is becoming more critical, and a better understanding of the …