isolation of pathogenic yersinia enterocolitica 1b/o:8 from apodemus mice in japan.yersinia enterocolitica was isolated from 15.7% (88/560) of wild rodents captured in 15 prefectures in japan. prevalences by rodent species were 18.0% (70/388) in japanese field mice (apodemus speciosus), 20% (14/71) in small japanese field mice (apodemus argenteus), and 11% (4/38) in gray red-backed vole (myodes rufocanus bedfordiae), suggesting that these rodent species are important reservoirs of y. enterocolitica. although most of the isolates were identified as biotype 1a, the pathogenic bi ...201525380368
genotoxic assessment of small mammals at an illegal dumpsite at the aomori-iwate prefectural 2003, we examined the chromosomes of grass voles at an illegal dumpsite at the aomori-lwate prefectural boundary. in subsequent years, from 2003-2006, we surveyed the chromosomes of four species of small mammals, namely, the japanese grass vole (microtus montebelli), the large japanese field mouse (apodemus speciosus), the small japanese field mouse (a. argenteus), and the greater japanese shrew mole (urotrichus talpoides). each annual survey revealed, both on a yearly basis and during the en ...200919341331
contamination status and possibility of toxic effects of co-planar polychlorinated biphenyls, polycyclic aromatic hydrocarbons, and dichlorodiphenyltrichloroethane in large japanese field mouse (apodemus speciosus) collected from hokkaido and aomori.contamination levels of coplanar polychlorinated biphenyls (co-pcbs), polycyclic aromatic hydrocarbons (pahs), and dichlorodiphenyltrichloroethane (ddts) were measured in the entire body of the large japanese field mouse (apodemus speciosus) collected from hokkaido (ishikari and rankoshi) and aomori prefecture (takko) in japan. higher concentrations of pcbs including co-pcbs, were observed in the mice collected from ishikari than those from rankoshi. the concentration of pahs in the soil from is ...201425282952
survey of babesia microti infection in field rodents in japan: records of the kobe-type in new foci and findings of a new type related to the otsu-type.of 247 rodents comprising 5 genera and 7 species collected at 17 sites throughout japan from 2003 to 2005, babesia microti was detected microscopically and by polymerase chain reaction (pcr) in 36 rodents comprising 2 genera and 3 species from 12 sites. based on the analysis of small subunit ribosomal rna gene (ssurdna) sequences, the kobe-type, the etiological type of the first japanese case of human infection was found in apodemus speciosus and apodemus argenteus in aomori, the northernmost pr ...200717237595
classification of the spermatogenic cycle, seasonal changes of seminiferous tubule morphology and estimation of the breeding season of the large japanese field mouse (apodemus speciosus) in toyama and aomori prefectures, japan.the large japanese field mouse, apodemus speciosus, is a potential indicator of environmental stress, but this function has not been confirmed by histological studies. since environmental stress affects the reproductive function of mice, we determined the reproductive characteristics of this species at two locations: toyama (36°35'n, 137°24'e) and aomori (40°35'n, 140°57'e). mice were captured during may-november (n=119) and july-november (n=146) at these locations, respectively. we classified t ...201525754934
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