| experimental evaluation of mink and apodemus speciosus in the echinococcus multilocularis life-cycle in hokkaido, japan. | the epizootiological status of mink (mustela vison) as definitive hosts and apodemus speciosus as intermediate hosts in the transmission of echinococcus multilocularis in hokkaido, japan, were evaluated by orally inoculating mink with protoscoleces, and a. speciosus with eggs of the cestode, respectively. no tapeworms were recovered from the alimentary tract of the mink, and no hydatid cysts were recovered from the viscera of the egg-inoculated a. speciosus. we conclude that mink and a. speciosu ... | 1992 | 1512885 |
| 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 |
| mixed infection of different borrelia species among apodemus speciosus mice in hokkaido, japan. | the wood mouse (apodemus speciosus) serves as a wildlife reservoir for lyme disease spirochetes in hokkaido, japan. to isolate borrelia species, we captured 34 wood mice in an area where borrelia species are endemic during october 1993. the earlobes (right and left), heart, spleen, and urinary bladder from each mouse were used as culture sources. as a result of culture 73 isolates from 21 mice were classified by rrna gene restriction fragment length polymorphism analysis. ribotype groups iii (bo ... | 1995 | 7536218 |
| evidence for the existence of puumula-related virus among clethrionomys rufocanus in hokkaido, japan. | we conducted field surveys of indigenous rodent species in hokkaido, japan from 1980 to 1993. serum samples were collected from 663 rodents, including clethrionomys rufocanus, apodemus speciosus, a. argenteus, and c. rutilus. antibody to hantavirus was determined by the protein g antibody assay. positive c. rufocanus were detected in seven of eight collection sites, but no antibody was detected in the remaining rodent species. to reveal the serotype of the circulating virus in c. rufocanus, anti ... | 1995 | 7573700 |
| comparative studies on borrelia afzelii isolated from a patient of lyme disease, ixodes persulcatus ticks, and apodemus speciosus rodents in japan. | the genospecies borrelia afzelii was isolated from a patient of lyme disease in hokkaido, japan, for the first time, by culturing the minced erythema lesion in bsk ii medium. two analytical methods, rrna gene restriction fragment length polymorphism (rflp) and polymerase chain reaction (pcr) using the specific primer set to amplify the 16s rrna gene, revealed that this clinical isolate belongs to the group of b. afzelii. in our culture collection of spirochetes, part of the isolates from ixodes ... | 1994 | 7968670 |
| 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 |
| characterization of borrelia spp. isolated from the tick, ixodes tanuki and small rodents in japan. | spirochetes were isolated from the tick, ixodes tanuki, as well as wood mice (apodemus speciosus) and voles (clethrionomys rufocanus and eothenomys smithii), caught in fukui, tokushima, and hokkaido, japan, from 1991 to 1993. spirochetes were characterized on the basis of protein profiles, reactivities with monoclonal antibodies (mabs), outer surface protein a gene (ospa) and outer surface protein b gene (ospb) amplification analysis, rrna gene and flagellin gene restriction fragment length poly ... | 1996 | 9359053 |
| isolation of tick-borne encephalitis virus from wild rodents and a seroepizootiologic survey in hokkaido, japan. | to determine the vertebrate host of tick-borne encephalitis (tbe) virus in the southern part of hokkaido, japan, virus isolation was performed using spleens from small mammals captured in the area. two virus strains were isolated, one strain from apodemus speciosus and another from clethrionomys rufocanus. virus isolates were inoculated onto baby hamster kidney cell monolayers and antigen slides were prepared for an indirect immunofluorescent antibody assay. two isolates were identified as tbe v ... | 1999 | 10072153 |
| 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 |
| detection of babesia microti-like parasite in filter paper-absorbed blood of wild rodents. | the first case of human babesiosis was reported in japan. the epidemiology of this disease in japanese nature remains unclear. in this study, 97 common field mice captured in hokkaido, japan, were examined. blood specimens absorbed onto filter papers were eluted and tested by nested pcr using specific primers for the b. microti nuclear small subunit rrna genome. twenty-three percent (11/47) of apodemus speciosus and four percent (2/50) of clethrionomys rufocanus were positive. the 159-bp primary ... | 2002 | 11913551 |
| 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 |
| u.s.-type babesia microti isolated from small wild mammals in eastern hokkaido, japan. | our previous report demonstrated that small wild rodents in japan harbored two types of novel babesia microti-like parasites (kobe and hobetsu types), but not the type widely distributed throughout the temperate zones of north american and eurasian continents (u.s. type). in this study, we surveyed small wild mammals collected at various places in the northern part of japan, seeking for u.s.-type b. microti. a total of 197 small mammals comprising 10 species, apodemus speciosus, a. argenteus, cl ... | 2004 | 15353841 |
| detection of ehrlichial dna in small rodents captured in a woodland area of hokkaido, the northernmost island of japan, where lyme disease is endemic. | the ehrlichial gene was detected in small rodents trapped in a lyme disease-endemic area in hokkaido, the northernmost island of japan. primer pairs of 16s rdna targeting the genus ehrlichia and other regions of the 16s rdna specific for e. chaffeensis and e. muris were used for identification. the dna fragment specific for 16s rdna of ehrlichia spp. was detected in 4 of 94 apodemus speciosus mice (positive rate: 4.3%) and 5 of 73 clethrionomys rufocanus bedfordiae mice (positive rate: 6.8%). th ... | 2005 | 16249629 |
| 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 |
| a trend of central versus peripheral structuring in mitochondrial and nuclear gene sequences of the japanese wood mouse, apodemus speciosus. | a phylogeographic analysis was performed on japanese endemic wood mice (apodemus speciosus) using nuclear interphotoreceptor retinol binding protein (irbp) gene sequences (1,152 bp), together with previously published mitochondrial cytochrome b (cyt b) data. in the irbp analysis, 40 haplotypes were recovered from 84 individuals by statistical and subcloning methods. substantial sequence variation was determined from the irbp data (pi=0.0047), and no significant evidence of recombination was dete ... | 2008 | 18393564 |
| antimicrobial susceptibility of escherichia coli isolates from wild mice in a forest of natural park in hokkaido, japan. | to reveal the antimicrobial susceptibilities of escherichia coli isolates from wild mice, 81 e. coli isolates were obtained from 109 voles (clethrionomys spp.), 52 large japanese field mice (apodemus speciosus) and 19 small japanese field mice (a. argenteus) captured in a forest of natural park, hokkaido of japan. seventy-eight of eighty-one e. coli isolates were susceptible to all 10 antimicrobial agents tested. one e. coli isolate was resistant to ampicillin, dihydrostreptomycin, kanamycin, ch ... | 2011 | 21525710 |
| 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 |
| genetic and biological characterization of tick-borne encephalitis virus isolated from wild rodents in southern hokkaido, japan in 2008. | tick-borne encephalitis virus (tbev) is a zoonotic agent causing severe encephalitis in humans. a recent epizootiological survey indicated that endemic foci of tbev have been maintained in the southern part of hokkaido until recently. in this study, we sought to isolate tbev from wild rodents in the area. one virus, designated oshima 08-as, was isolated from an apodemus speciosus captured in hokuto in 2008. oshima 08-as was classified as the far eastern subtype of tbev and formed a cluster with ... | 2013 | 23590320 |
| 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 |
| 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 |
| brachylaima ezohelicis sp. nov. (trematoda: brachylaimidae) found from the land snail ezohelix gainesi, with a note of an unidentified brachylaima species in hokkaido, japan. | in the japanese archipelago, ezohelix gainesi, a member of bradybaenid land snails, is endemic mainly to the island of hokkaido. during july to august of 2016, a survey to detect trematode infections from e. gainesi was carried out at a forest city park in asahikawa, hokkaido. systemic infections of the snails with sporocysts containing short-tailed cercariae were found in 5.3% of 94 individuals examined. furthermore, most of them (90.4%) harbored non-encysted metacercariae within their kidneys. ... | 2017 | 28131768 |
| geographic variation in skull morphology of the large japanese field mice, apodemus speciosus (rodentia: muridae) revealed by geometric morphometric analysis. | we analyzed geographic variation in skull morphology of the large japanese field mouse (apodemus speciosus) and determined changes in skull morphology that occurred during the evolutionary history of a. speciosus in relation to the estimated distribution range in the last glacial maximum (lgm). we analyzed 1,416 specimens from 78 localities using geometric morphometric techniques applied to the dorsal side of the cranium and mandible. while large variations within and among the populations in ho ... | 2016 | 27032678 |
| 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 ... | 2014 | 25282952 |
| first molecular detection and characterization of hepatozoon and sarcocystis spp. in field mice and voles from japan. | sarcocystis and hepatozoon species are protozoan parasites that are frequently detected in domestic and wild animals. rodents are considered common intermediate and paratenic hosts for several sarcocystis and hepatozoon species. here, blood dna samples from a total of six rodents, including one myodes rutilus, one myodes rufocanus, and four apodemus speciosus, collected from hokkaido, japan, were shown by conventional pcr of the 18s ribosomal rna (rrna) gene to contain sarcocystis and hepatozoon ... | 2017 | 28526989 |