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Norovirus (NV) is a causative agent of acute gastroenteritis in humans, and shellfishes including oysters act as major vehicles of the virus. To investigate the genetic characteristics of NVs, we collected 1,512 oysters for raw consumption between October 2002 and March 2005 from two distinct areas (area A: the Sanriku Sea area; area B: the Setouchi Sea(More)
During 2005-2008, a longitudinal study was conducted in southern Japan to detect and characterize multidrug-resistant Salmonella enterica serovars recovered from cattle diagnostic specimens. Determination of antimicrobial resistance phenotypes and genotypes, identification of Salmonella genomic island 1 (SGI1), detection of virulence genes, plasmid(More)
The sequences of the genes of two of the major capsid proteins of epizootic haemorrhagic disease virus serotype 1 (EHDV-1, Orbivirus genus, Reoviridae) have been determined by analyses of cDNA clones representing the L2 and S7 RNA segments. The EHDV-1 S7 RNA segment, which encodes the VP7 core protein, is 1162 nucleotides in length and has the capacity to(More)
During 2004 and 2006, multidrug-resistant Salmonella enterica subspecies enterica serovar Infantis (Salmonella Infantis) isolates (n = 120) were recovered from broiler cecal samples collected from a meat-processing plant, and the isolates were examined. The study was conducted to detect and characterize extended-spectrum beta-lactamase (ESBL)-producing(More)
During 2009, Salmonella enterica subspecies enterica serovar Stanley isolates were recovered from cattle diagnostic specimens in southern Japan, and the isolates were examined to characterize the genetic determinants involved in this new pathogenicity that associated with mortality in cattle. All the isolates were multi-drug resistance exhibited resistance(More)
During the 1998 to 2003 period, cecal contents of 4,024 broiler chickens from 252 flocks raised in 63 holdings were examined for Salmonella. The aims were to establish the actual status of the infection, its temporal distribution, prevalent serotype, and common genotype among broiler flocks brought at the slaughterhouse. Collected samples were preenriched(More)
Cecal contents (16 samples/each flock) of broilers derived from 212 flocks were investigated for colonization of Campylobacter from 1995 to 1999 in the southern part of Japan, and the isolates were tested for antimicrobial susceptibilities. C. jejuni-positive flocks numbered 42 (19.8%) and C. coli-positive ones 26 (12.3%); Campylobacter spp. were recovered(More)
The best combination of primers and the annealing temperature of multiplex PCR for Campylobacter jejuni, Campylobacter coli, and Campylobacter lari were examined. The multiplex PCR was able to detect type strains of the three species. All results of identification of wild strains (30 strains of C. jejuni, 20 strains of C. coli, and 4 strains of C. lari) by(More)
The minimal inhibitory concentrations (MICs) of 23 Treponema phagedenis-like spirochetes isolated from dairy cattle with papillomatous digital dermatitis (PDD) lesions in Japan were investigated by a broth microdilution method using 15 antimicrobial agents. Although all MIC values showed a monomodal distribution, the MICs of the antimicrobial agents for 90%(More)
The incidence of Campylobacter jejuni and Campylobacter coli in broiler farms was 33.9% (19/56). C. jejuni-positive flocks accounted for 20.0% (17/85) and C. coli-positive ones was 4.7% (4/85). There were 14 patterns (fla type) of restriction fragment length polymorphism (RFLP) of flagellin A gene among these 22 strains of C. jejuni and C. coli including(More)