| susceptibility of laboratory and wild rodents to rattus or apodemus-type hantaviruses. | adult wistar rats (rattus norvegicus), apodemus agrarius, meriones unguiculatus, clethrionomys rufocanus, and apodemus argenteus were inoculated with rattus-type (sr-11, ki-262, and tb-314) or apodemus-type (hantaan 76-118) hantaviruses. production of serum antibody to the inoculated virus (iaha titres of 1:32 to 1:4 096) was obsersved in all rodent species 10 weeks after virus inoculation. rattus-type virus was detected in some organs of all the rodent species employed except of apodemus agrari ... | 1991 | 1683116 |
| first record of the larval parasitic nematode rhabditis orbitalis from japanese wood mice (apodemus spp.). | parasitic larvae of rhabditis orbitalis (formerly confused with pelodera strongyloides) were found in the conjunctival sacs of the eyes of apodemus argenteus and a. speciosus from japanese islands. | 1991 | 1940254 |
| mice and moles inhabiting mountainous areas of shimane peninsula as sources of infection with yersinia pseudotuberculosis. | a total of 1,835 yersinia spp. were isolated from 925 (60.5%) of 1,530 wild mice and from 139 (79.9%) of 174 moles living in mountainous areas of eastern shimane prefecture, japan. the yersinia spp. included 1,106 yersinia enterocolitica, 26 y. enterocolitica-like, 176 yersinia mollaretii, 149 yersinia frederiksenii, 70 yersinia intermedia, 231 yersinia kristensenii, 5 yersinia aldovae, and 72 yersinia pseudotuberculosis. human pathogenic y. enterocolitica was not isolated. y. pseudotuberculosis ... | 1990 | 2254420 |
| eimerians from different karyotypes of the japanese wood mouse (apodemus spp.), with descriptions of two new species and a redescription of eimeria montgomeryae lewis and ball, 1983. | examination of 131 wood mice (apodemus spp.) representing 2 species and 6 subspecies collected from the japanese islands of hokkaido, honshu, kyushu, and tsushima showed that 70 mice (53%) had coccidian oocysts in their feces. these included 21 of 42 (50%) apodemus argenteus argenteus; 7 of 14 (50%) apodemus argenteus hokkaidi; 2 of 3 (67%) apodemus argenteus sagax; 3 of 9 (33%) apodemus speciosus ainu; 36 of 61 (59%) apodemus speciosus speciosus; and 1 of 2 (50%) apodemus speciosus tusimaensis. ... | 1985 | 4093813 |
| [serosurvey for spotted fever group rickettsial infection in vertebrates in shimane prefecture]. | we carried out a survey for the prevalence of antibodies to the spotted fever group (sfg) rickettsia in vertebrates such as dogs, cattle, deer, and mice in shimane prefecture. rickettsia japonica was employed as antigen in indirect immunofluorescence (if) tests. the experiment for natural infections using decoy animals was performed in the field of the endemic area. 1. among 115 street dogs, 18.3% possessed the antibodies against sfg rickettsia, while all of the 8 hunting dogs had the antibodies ... | 1995 | 7602185 |
| identification of spirochetes isolated from wild rodents in japan as borrelia japonica. | spirochetes isolated from three species of wild mice, apodemus speciosus, apodemus argenteus, and eothenomys smithi, which were caught on honshu, japan, were characterized on the bases of protein profiles, reactivities with monoclonal antibodies (mabs), and dna homology values. all the isolates reacted with mab o1441b, which is specific for borrelia japonica, but not with mab p62, which is specific for borrelia burgdorferi sensu stricto, borrelia garinii, and borrelia afzelii. the dna relatednes ... | 1995 | 7615765 |
| infectivity and pathogenicity of yersinia enterocolitica serovar 0:8 to wild rodents in japan. | three species of wild rodents, anderson's red-backed voles (eothenomys andersoni), large japanese field mice (apodemus speciosus) and small japanese field mice (apodemus argenteus), mainly living in mountainous areas in japan, were challenged orally with yersinia enterocolitica serovar 0:8 to determine infectivity and pathogenicity of this micro-organism with respect to wild rodents. y. enterocolitica 0:8 was shown to colonize the intestinal tract of these three types of wild rodents, and was oc ... | 1994 | 7701863 |
| borrelia japonica in nature: genotypic identification of spirochetes isolated from japanese small mammals. | spirochetes were isolated from earlobe tissues of shrews (sorex unguiculatus, sorex caecutiens, and crocidura dsienezumi), voles (clethrionomys rufocanus), and mice (apodemus argenteus and apodemus speciosus) captured in various localities in japan. the isolates were identified as borrelia japonica by rrna gene restriction fragment length polymorphism analysis. the data suggest that these small mammals are candidates of reservoir hosts for b. japonica. | 1994 | 7869959 |
| developmental and morphological characteristics of taenia taeniaeformis (batsch, 1786) in clethrionomys rufocanus bedfordiae and rattus norvegicus from different geographical locations. | developmental and morphological characteristics of 3 isolates of taenia taeniaeformis isolated from clethrionomys rufocanus bedfordiae in abuta (70 km southwest of sapporo), japan (isolate acr), and from rattus norvegicus in sapporo, japan (isolate srn) and kuala lumpur, malaysia (isolate krn) were compared. eggs of 3 isolates were administered to several species of rodents. isolate acr infected c. rufocanus bedfordiae, apodemus speciosus, and apodemus argenteus, but not rats or mice, whereas is ... | 1994 | 8195949 |
| distribution of borrelia species associated with lyme disease in the subalpine forests of nagano prefecture, japan. | we surveyed the natural distribution of borrelia species associated with lyme disease in the subalpine forests of nagano prefecture, japan, during 1993-94. tick-derived isolates (n = 112) from ixodes persulcatus and rodent-derived isolates (n = 55) from apodemus argenteus, apodemus speciosus, eothenomys andersoni, eothenomys smithii, and microtus montebelli were classified by rrna gene restriction fragment length polymorphism analysis (rflp ribotyping). ribotype group iv (an intraspecific varian ... | 1996 | 8709867 |
| epidemiological survey of small rodents for spotted fever rickettsial antibody in hokkaido, japan. | the prevalence of antibody against spotted fever group rickettsia (sfgr) was investigated with rickettsia japonica antigen in small rodents captured in an area in hokkaido, where no human cases of sfgr infection had been reported. antibody against sfgr was found in apodemus speciosus and clethrionomys rufocanus but not in apodemus argenteus. none of these rodents had antibody against r. typhi. this is the first report of the antibody against sfgr in rodents in hokkaido. | 1996 | 8806039 |
| western immunoblot analysis of haemobartonella muris and comparison of 16s rrna gene sequences of h. muris, h. felis, and eperythrozoon suis. | infectious agents were isolated from the spleens of three wild mice (apodemus argenteus) by intraperitoneal inoculation of the spleen homogenate into laboratory mice. the laboratory mice developed clinical signs and splenomegaly, and three isolates were maintained by passage in mice. tetracyclines were effective in preventing infection of mice with these agents, but streptomycin and penicillin were ineffective. the agents did not grow in bacterial growth media or chicken embryos. in smears of bl ... | 1997 | 9157135 |
| delayed response of qm- and da/dapi-fluorescence in c-heterochromatin of the small japanese field mouse, apodemus argenteus. | the small japanese field mouse apodemus argenteus has the diploid chromosome number of 46, carrying rather large centromeric c-heterochromatin in most of the 44 autosomes and a large amount of c-heterochromatin in the sex chromosomes: the largest subtelocentric x was heterochromatic in almost two-fifth (whole short arm and proximal part of the long arm) of its entire length and the medium-sized acrocentric y was totally heterochromatic. the c-heterochromatin (c-positive) areas, other than those ... | 1997 | 9200979 |
| polymorphic microsatellite dna markers in the japanese wood mouse apodemus argenteus. | | 1998 | 9787451 |
| two taenia species found in japan, with new distribution record of taenia polyacantha leuckart, 1856 (cestoda: taeniidae). | in an epidemiological survey for echinococcus multilocularis in rodents and insectivores from the northernmost part of the central mainland of japan (honshu), two taeniid species, taenia crassiceps and taenia polyacantha, were found in microtus montebelli and apodemus argenteus, respectively. the latter is the first record of distribution in japan, and the former is the second after its first recovery from the central part of japan. although we have found neither larval nor strobilar stage of e. ... | 2000 | 10725694 |
| molecular cytogenetic analysis of the highly repetitive dna in the genome of apodemus argenteus, with comments on the phylogenetic relationships in the genus apodemus. | the dna of apodemus argenteus was digested with drai, and the resultant drai fragment of highly repetitive dna was isolated and analyzed by dna filter hybridization, cloning, sequencing, and fluorescence in situ hybridization (fish). southern blot hybridization and nucleotide sequencing revealed that most of the drai fragment consisted of a 230-bp repeating unit and contained no sex-chromosome-specific nucleotide sequences. the drai fragment included the cenp-b box-like sequence, with a strong h ... | 2001 | 11435698 |
| human babesiosis in japan: epizootiologic survey of rodent reservoir and isolation of new type of babesia microti-like parasite. | we have carried out epizootiologic surveys at various sites in japan to investigate wild animals that serve as reservoirs for the agents of human babesiosis in the country. small mammals comprising six species, apodemus speciosus, apodemus argenteus, clethrionomys rufocanus, eothenomys smithii, crocidura dsinezumi, and sorex unguiculatus, were trapped at various places, including hokkaido, chiba, shiga, hyogo, shimane, and tokushima prefectures. animals harboring babesia microti-like parasites w ... | 2001 | 11724838 |
| differential geographic patterns of mitochondrial dna variation in two sympatric species of japanese wood mice, apodemus speciosus and a. argenteus. | we examined the gene sequences of mitochondrial cytochrome b (cyt b) in two japanese wood mouse species, apodemus speciosus (n = 89) and a. argenteus (n = 46), which are distributed on the four main islands of japan (hokkaido, honshu, shikoku, and kyushu) and on the small islands surrounding them. apodemus speciosus, the larger of the two species, showed substantial genetic variation, with a maximum of 3% sequence divergence, and remarkable phylogenetic subdivision with two major clades. one cla ... | 2004 | 15329497 |
| 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 ... | 2007 | 17237595 |
| the delayed quinacrine mustard fluorescence from the c-blocks of apodemus argenteus is due to the introduction of nicks into the dna. | "delayed qm-fluorescence" refers to the unusual kinetics of fluorescence from most of the c-heterochromatic regions of the chromosomes of the small japanese field mouse apodemus argenteus. when stained with quinacrine mustard (qm-stained), these c-heterochromatic regions emit weak fluorescence immediately after exposure to blue light (bl); they emit bright fluorescence within a few minutes; and the intensity of the fluorescence gradually decreases after maximum fluorescence has been recorded. to ... | 2007 | 17867860 |
| prevalence and genetic diversity of bartonella species isolated from wild rodents in japan. | here, we describe for the first time the prevalence and genetic properties of bartonella organisms in wild rodents in japan. we captured 685 wild rodents throughout japan (in 12 prefectures) and successfully isolated bartonella organisms from 176 of the 685 rodents (isolation rate, 25.7%). those bartonella isolates were all obtained from the rodents captured in suburban areas (rate, 51.8%), but no organism was isolated from the animals captured in city areas. sequence analysis of rpob and glta r ... | 2008 | 18606803 |
| genotoxic assessment of small mammals at an illegal dumpsite at the aomori-iwate prefectural boundary. | in 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 ... | 2009 | 19341331 |
| female-biased sex allocation of offspring by an apodemus mouse in an unstable environment. | we investigated the effects of population fluctuation on the offspring's sex allocation by a weakly polygynous mouse, apodemus argenteus, for 3 years. in acorn-poor seasons, heavier mothers invested more in sons, and lighter mothers invested more in daughters. in acorn-rich seasons, heavier mothers invested more in daughters, and lighter mothers invested more in sons. maternal body condition and litter size affected the sex allocation. furthermore, there was a maternal investment trade-off betwe ... | 2009 | 19554103 |
| bartonella japonica sp. nov. and bartonella silvatica sp. nov., isolated from apodemus mice. | two bacterial strains, fuji 18-1(t) and fuji 23-1(t), were isolated from the blood of the small japanese field mouse (apodemus argenteus) and the large japanese field mouse (apodemus speciosus), respectively, specimens of which were captured in the forest of mount fuji, japan. phenotypic characterization (growth conditions, incubation periods, biochemical properties and cell morphologies), dna g+c contents (40.1 mol% for strain fuji 18-1(t) and 40.4 mol% for strain fuji 23-1(t)) and sequence ana ... | 2010 | 19656930 |
| the role of nick formation in delayed quinacrine mustard fluorescence in the c-heterochromatin of apodemus argenteus. | chromosomes stained with fluorochromes, including quinacrine mustard (qm), emit the brightest fluorescence immediately after exposure to excitation light, and the fluorescence gradually fades with an increase in exposure time. however, in the qm-stained chromosomes of the small japanese field mouse apodemus argenteus, most c-heterochromatic regions emit weak fluorescence immediately after exposure to blue light, and they become brightly fluorescent by prolonged exposure (delayed qm fluorescence) ... | 2009 | 19715504 |
| Interspecific Differences in Tannin Intakes of Forest-Dwelling Rodents in the Wild Revealed by a new Method Using Fecal Proline Content. | Mammalian herbivores adopt various countermeasures against dietary tannins, which are among the most widespread plant secondary metabolites. The large Japanese wood mouse Apodemus speciosus produces proline-rich salivary tannin-binding proteins in response to tannins. Proline-rich proteins (PRPs) react with tannins to form stable complexes that are excreted in the feces. Here, we developed a new method for estimating the tannin intake of free-living small rodents, by measuring fecal proline cont ... | 2011 | 22161223 |
| molecular characterization and specific detection of anaplasma species (ap-sd) in sika deer and its first detection in wild brown bears and rodents in hokkaido, japan. | a previously undescribed anaplasma species (herein referred to as ap-sd) has been detected in sika deer, cattle and ticks in japan. despite being highly similar to some strains of a. phagocytophilum, ap-sd has never been detected in humans. its ambiguous epidemiology and the lack of tools for its specific detection make it difficult to understand and interpret the prevalence of this anaplasma species. we developed a method for specific detection, and examined ap-sd prevalence in hokkaido wildlif ... | 2015 | 26431688 |
| dynamics, co-infections and characteristics of zoonotic tick-borne pathogens in hokkaido small mammals, japan. | many of the emerging infectious diseases originate in wildlife and many of them are caused by vector-borne pathogens. in japan, zoonotic tick-borne pathogens (tbps) are frequently detected in both ticks and wildlife. here, we studied the infection rates of potentially zoonotic species, including anaplasma, ehrlichia, neoehrlichia and babesia spp., in hokkaido's most abundant small mammals as they relate to variable extrinsic factors that might affect the infection rates of these pathogens. a tot ... | 2016 | 27166277 |
| phylogenetic relationships of three species within the family heligmonellidae (nematoda; heligmosomoidea) from japanese rodents and a lagomorph based on the sequences of ribosomal dna internal transcribed spacers, its-1 and its-2. | nematodes of the family heligmonellidae (heligmosomoidea; trichostrongylina) reside in the digestive tracts of rodents and lagomorphs. although this family contains large numbers of genera and species, genetic information on the heligmonellidae is very limited. we collected and isolated adult worms of three species in japan that belong to the family heligmonellidae, namely heligmonoides speciosus (konno, 1963) durette-desset, 1970 (hs) from apodemus argenteus, orientostrongylus ezoensis tada, 19 ... | 2012 | 22458194 |
| 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 ... | 2015 | 25380368 |
| geographic variation of absolute and relative lower molar sizes in two closely related species of japanese field mice (apodemus speciosus and apodemus argenteus: muridae, rodentia). | geographic variation of the sizes of lower molar (m1 size) and relative lower molar sizes (size proportions among m1, m2, and m3) were examined in two species of closely related japanese field mice (apodemus speciosus and apodemus argenteus). to determine the cause of the geographic variations observed, phylogeographic structure, interspecific competition, climate, and location (mainland or island) were compared. with regard to the phylogeographic structure, the sizes of the molar and the relati ... | 2017 | 28148213 |
| estimating the molecular evolutionary rates of mitochondrial genes referring to quaternary ice age events with inferred population expansions and dispersals in japanese apodemus. | determining reliable evolutionary rates of molecular markers is essential in illustrating historical episodes with phylogenetic inferences. although emerging evidence has suggested a high evolutionary rate for intraspecific genetic variation, it is unclear how long such high evolutionary rates persist because a recent calibration point is rarely available. other than using fossil evidence, it is possible to estimate evolutionary rates by relying on the well-established temporal framework of the ... | 2015 | 26373638 |
| chromosomal aberrations in wild mice captured in areas differentially contaminated by the fukushima dai-ichi nuclear power plant accident. | following the fukushima dai-ichi nuclear power plant accident, radiation effects on nonhuman biota in the contaminated areas have been a great concern. the induction of chromosomal aberrations in splenic lymphocytes of small japanese field mice (apodemus argenteus) and house mice (mus musculus) inhabiting fukushima prefecture was investigated. in mice inhabiting the slightly contaminated area, the average frequency of dicentric chromosomes was similar to that seen in mice inhabiting a noncontami ... | 2015 | 26217955 |
| a note on the presence of b chromosome in the small japanese field mouse, apodemus argenteus, in central honshu, japan. | previously, many studies have revealed the presence of b chromosomes in wild mouse taxa of the genus apodemus (rodentia, muridae). in one of the apodemus species, a. argenteus, which is endemic to japan, it is known that b chromosomes were confirmed only in individuals (2n = 46 + b chromosome) from hokkaido, japan. there is no report of the presence of b chromosomes from other localities in the japanese islands. in this study, we analyzed the chromosomal constitutions of 43 individuals of a. arg ... | 2014 | 25735139 |
| a hierarchical bayesian model to estimate the unobservable predation rate on sawfly cocoons by small mammals. | predation by small mammals has been reported as an important mortality factor for the cocoons of sawfly species. however, it is difficult to provide an accurate estimate of newly spun cocoons and subsequent predation rates by small mammals for several reasons. first, all larvae do not spin cocoons at the same time. second, cocoons are exposed to small mammal predation immediately after being spun. third, the cocoons of the current generation are indistinguishable from those of the previous gener ... | 2015 | 25691994 |
| estimation of absorbed radiation dose rates in wild rodents inhabiting a site severely contaminated by the fukushima dai-ichi nuclear power plant accident. | the dose rates of radiation absorbed by wild rodents inhabiting a site severely contaminated by the fukushima dai-ichi nuclear power plant accident were estimated. the large japanese field mouse (apodemus speciosus), also called the wood mouse, was the major rodent species captured in the sampling area, although other species of rodents, such as small field mice (apodemus argenteus) and japanese grass voles (microtus montebelli), were also collected. the external exposure of rodents calculated f ... | 2015 | 25666988 |
| proposal for 'candidatus mycoplasma haemomuris subsp. musculi' in mice, and 'candidatus mycoplasma haemomuris subsp. ratti' in rats. | mycoplasma haemomuris is causative of infectious anaemia or splenomegaly in rodents. we examined the nucleotide sequences of the non-ribosomal genes, rnpb and dnak, in strains of the species m. haemomuris detected in small field mice and black rats. rnpb nucleotide sequences in strains of the species m. haemomuris isolated from small field mice and black rats had only 89 % sequence similarity, suggesting their separation into two distinct subgroups. dnak had a nucleotide sequence similarity of 8 ... | 2015 | 25406232 |
| [sequencing of the mtdna cytochrome b gene and reconstruction of the matriarchal relationships between wood and field mice of the genus apodemus (muridae, rodentia)]. | the primary sequence of a 402-bp part of the cytochrome b gene was determined in nine species of wood and field mice of the genus apodemus. the majority of mutations were synonymous. the total number of transitions exceeded than of transversions. among all substitutions, c-t transitions prevailed (51%); the most common substitution type in genus-specific sites was c-a transversions (42%). in interpopulation analysis, only transitions were recorded. a phylogenetic tree, constructed with the use o ... | 1998 | 9719913 |
| nonrandom distribution of sister chromatid exchanges in the chromosomes of three mammalian species. | the frequency and distribution of mitomycin c (mmc)-induced sister chromatid exchanges (sces) were investigated in the fibroblast chromosomes of three mammalian species, microtus montebelli, apodemus argenteus and chimarrogale himalayica, by the fluorescence-plus-giemsa (fpg) and c-band staining methods, paying special attention to the large c-band area (c-block)-carrying and/or nucleolus organizer region (nor)-carrying chromosomes. the junctions of heterochromatin and euchromatin (he-junctions) ... | 1995 | 8819791 |
| climatic adaptation in thermogenesis and thermal insulation in wood mice (apodemus argenteus). | wood mice (apodemus argenteus) were trapped live at three different altitudes (below 1,000, 1,900, and 2,400 m) during a 1-year period (feb. 1984-jan. 1985). after remaining at the trapped locations for 10-14 days, they were transferred into a climatic chamber at an altitude of 610 m. oxygen consumption (vo2) and colonic temperature (tco) were measured at chamber temperatures (ta) of five steps (30, 20, 10, 0, and -10 degrees c) in freely moving conditions. in response to ta of 0 degrees c for t ... | 1989 | 2761121 |
| [hematocrit and right ventricular weight. i. seasonal and latitudinal changes in hematocrit and right ventricular weights of wood mice, apodemus argenteus (author's transl)]. | | 1974 | 4858992 |
| postnatal physical and behavioral development of the japanese wood mice, apodemus argenteus argenteus. | | 1971 | 5283551 |
| prenatal postcranial development in two species of sympatric japanese wood mice (apodemus argenteus and a. speciosus): a comparison of arboreal versus terrestrial congeners. | habitats of two closely related japanese field mice, apodemus argenteus and a. speciosus, broadly overlap in many japanese forests. a. argenteus being more arboreal and a. speciosus being more terrestrial, it is thought that such ecological segregation allows their sympatric distribution. comparing these two congeners, whether ecological difference is reflected in postcranial development was examined. although overall ossification sequences were virtually identical, development of the caudal ver ... | 2017 | 28413175 |
| brachylaima asakawai sp. nov. (trematoda: brachylaimidae), a rodent intestinal fluke in hokkaido, japan, with a finding of the first and second intermediate hosts. | in the 1970's and 1980's, an unknown species of the genus brachylaima (trematoda: brachylaimidae) had been recorded from the intestines of rattus norvegicus and apodemus speciosus in hokkaido, japan. the rodent fluke was characteristic in extending a bilateral vitellarium till the level of posterior margin of anterior testis and in keeping almost the same-sized spherical ovary and testes. in this study, the rodent fluke was rediscovered from a. speciosus, apodemus argenteus, and myodes rufocanus ... | 2018 | 29705144 |
| rodent-borne orthohantaviruses in vietnam, madagascar and japan. | hantaviruses are harbored by multiple small mammal species in asia, europe, africa, and the americas. to ascertain the geographic distribution and virus-host relationships of rodent-borne hantaviruses in japan, vietnam, myanmar, and madagascar, rnalater™-preserved lung tissues of 981 rodents representing 40 species, collected in 2011-2017, were analyzed for hantavirus rna by rt-pcr. our data showed hantaan orthohantavirus da bie shan strain in the chinese white-bellied rat (niviventer confucianu ... | 2021 | 34372549 |