| isolation of icterohaemorrhagiae from microtus monte belli trapped at the nagaoka area, niigata prefecture in japan. | three strains of leptospira were isolated from field rodents on the occasion of scrub typhus survey on the nagaoka, kurojo, kamikawanishi area, niigata prefecture in september 1961. out of 10 microtus montebelli 3 strains of leptospira by means of heart puncture in febrile stage from guinea pigs. they were identified as icterohaemorrhagiae by cross-agglutination-lysis and a cross absorption tests. it was the first report of icterohaemorrhagiae in microtus montebelli in japan. | 1975 | 776885 |
| aggregated distribution of infective spots composed of leptotrombidium pallidum, highly prevalent with rickettsia tsutsugamushi, demonstrated by sentinel voles, microtus montebelli, on the ground. | in the epidemiological surveys on scrub typhus at chichibu city near tokyo, an area, 350 m by 35 m, in the hitsujiyama park was found to be heavily infested with rickettsia tsutsugamushi (rt). distribution of trombiculid mites and their infection rates in this area were studied using sentinel animals, 48 microtus montebelli and 10 ddy mice. the surveys were conducted 6 times in the autumn in 1985 and 1986. at the first 2 surveys, 16 animals were placed at random, and 4 restricted areas were iden ... | 1990 | 2128945 |
| [composition of milk and electrophoretic analysis of milk casein in herbivorous voles (microtus montebelli)]. | milk samples were collected from herbivorous voles (microtus montebelli) and their compositions were analyzed. total solids, fat, protein and ash concentrations of vole's milk were very higher than those of cow's milk. the lactose concentration was very lower than that of milk of cow or mouse. the electrophoretic patterns of milk casein of vole were different markedly from those of bovine, but resembled to those of mouse. | 1990 | 2193815 |
| a new heligmosomid nematode, heligmosomoides protobullosus n. sp. (heligmosomidae: nematoda), from the japanese grass vole, microtus montebelli milne-edwards. | | 1987 | 3323591 |
| prevalence of pneumocystis carinii in wild rodents in japan. | during the period from november 1980 to april 1984, 292 small wild rodents were captured in 6 localities in japan. eleven out of 142 apodemus speciosus, 1 out of 11 a. argenteus, 4 out of 40 microtus montebelli and 2 out of 3 mus musculus were positive for pneumocystis carinii. the intensity of infection was generally low and the infection rate did not show any significant difference between sexes of the host animals. the seasonal prevalence of infection in a. speciosus was not remarkable, but w ... | 1986 | 3526764 |
| immunohistochemical study of gastroenteropancreatic endocrine cells of the herbivorous japanese field vole, microtus montebelli. | the gastroenteropancreatic (gep) endocrine cells of the japanese field vole were studied immunohistochemically. somatostatin-, 5-hydroxytryptamine-, glicentin-, glucagon-, bovine pancreatic polypeptide-, gastrin-, gastric inhibitory polypeptide-, cholecystokinin-, substance p-, secretin-, neurotensin- and insulin-immunoreactive cells were revealed. the characteristic findings of the regional distribution and relative frequency of these immunoreactive cells in the gep system of the vole were as f ... | 1986 | 3532246 |
| monthly observation on rickettsia and complement fixing antibody response in microtus montebelli placed once on the ground endemic of scrub typhus or inoculated experimentally with rickettsia orientalis. | | 1968 | 5756349 |
| microtus species as new herbivorous laboratory animals: reproduction; bacterial flora and fermentation in the digestive tracts; and nutritional physiology. | in a study of the possible introduction of japanese field vole (microtus montebelli ) and hungarian voles (m. arvalis) as herbivorous experimental animals, the following biological characteristics were investigated: breeding and reproductive performance; bacterial flora and fermentation in the digestive tracts; and nutritional physiology. the animals are polyestrus , show postpartum estrus on the day of parturition, and there is little or no delay in implantation due to lactation, especially in ... | 1984 | 6377675 |
| studies on babesia first found in murine in japan: epidemiology, morphology and experimental infection. | during the period from november 1980 to september 1982, 314 small wild mammals were captured in 5 localities in japan. twenty-six out of 86 apodemus speciosus and one out of 6 a. argenteus both species captured in shiga prefecture (35 degrees 02'n, 135 degrees 50'e, 330 m elev .) were positive for babesia. the parasitemia in those animals was generally low. the infection rate did not show any significant difference between sexes of the host or between seasons, whereas it tended to go up with the ... | 1984 | 6730782 |
| in vitro fertilization and embryo development of japanese field voles (microtus montebelli). | optimal conditions for in vitro fertilization of japanese field voles (microtus montebelli) were analysed. the medium used was a modified krebs-ringer bicarbonate devised for in vitro fertilization in rats. ovulated eggs and epididymal spermatozoa were co-incubated in vitro at 37 degrees c under 5% co2 in air for 6 h, and the eggs were fixed with 2.5% (w/v) glutaraldehyde, stained with 0.25% (v/v) acetolacmoid and examined for evidence of fertilization at the pronuclear stage. although the ferti ... | 1995 | 7636806 |
| development of early-stage embryos of the japanese field vole, microtus montebelli, in vivo and in vitro. | although ovulation could be easily induced in the japanese field vole by administering pregnant mares' serum gonadotrophin and hcg, the number of embryos obtained varied from 1 to 47 (mean, 9.6). one-cell embryos were small (57.8-63.3 microns in diameter; mean, 61.0 microns) compared with those in other mammals. development of the preimplantation vole embryos in vivo was similar to that of mouse embryos. the first cleavage occurred between 24 and 26 h after mating. the second cleavage was betwee ... | 1994 | 7966023 |
| establishment and survival of the strobilar stage of taenia crassiceps in hamsters, gerbils, and mice, with reference to different helminth isolates. | following the oral administration of metacestodes of two isolates of taenia crassiceps, the enteral establishment and survival of the strobilar stage were examined in golden hamsters (mesocricetus auratus), mongolian gerbils (meriones unguiculatus) and laboratory mice. the origin of the isolates was microtus montebelli caught in japan in 1985 or clethrionomys rutilus captured on st. lawrence island, bering sea, in 1988 (abbreviated as jpn and sli isolates), respectively. the enteral establishmen ... | 1993 | 8295896 |
| [adrenocortical zonation in the laboratory japanese field vole (microtus montebelli)]. | adrenocortical zonation in the laboratory japanese field vole (microtus montebelli) was investigated histologically with special attention to the sex and species specific differences. the whole cortex and zona reticularis showed clear sex differences. they were thicker in females than in males. in this respect the vole was similar to the mouse and rat, but different from the syrian hamster and mastomys. male cortices were characterized by thick z. fasciculata and meagre z. reticularis, while bot ... | 1993 | 8519305 |
| penetration by field vole spermatozoa of mouse and hamster zonae pellucidae without acrosome reaction. | spermatozoa of the field vole (microtus montebelli) that bound to the zona pellucida of field vole oocytes underwent the acrosome reaction before passing through it. in contrast, vole spermatozoa that bound to the zonae of mouse and hamster oocytes penetrated the zonae without any sign of the acrosome reaction. the presence or absence of proteinase/hyaluronidase inhibitors in the medium did not make any difference to zona penetration by acrosome-intact vole spermatozoa. these observations sugges ... | 1996 | 8699440 |
| 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 |
| 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 |
| survey on wild rodents for endoparasites in iwate prefecture, japan. | wild rodents (58 apodemus speciosus, 29 a. argenteus and 7 microtus montebelli) were surveyed for endoparasites in iwate prefecture, japan, from october to december 1995 and from april to october 1996. two trematodes (echinostoma macrorchis, plagiorchis muris), 4 or more cestodes (hymenolepis diminuta, raillietina coreensis, cladothyridium spp., cysticercus fasciolaris), 12 nematodes (carolinensis minutus, eucoleus sp., heligmosomoides kurilensis, h. protobullosus, h. speciosus, heterakis spumos ... | 2003 | 14600361 |
| mite vectors (acari: trombiculidae) of scrub typhus in a new endemic area in northern kyoto, japan. | between 1983 and 1999, 27 human cases of scrub typhus (two fatal) occurred in the nodagawa river basin of northern kyoto, japan, an area where no cases had been previously reported. antibody screening of infected patients' sera showed that nine of 15 patients had high titers against the gilliam type of orientia tsutsugamushi (hayashi). to determine the vector mite transmitting the disease, we studied rodent and chigger populations in and near a rice field alongside the nodagawa river between 199 ... | 2004 | 14989353 |
| 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 |
| 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 |
| chromosomal aberrations in japanese grass voles in and around an illegal dumpsite at the aomori-iwate prefectural boundary. | bone marrow chromosomes of thirty specimens of the japanese grass vole, microtus montebelli (2n=30), which had been caught on and near an illegal dumpsite at the aomori-iwate prefectural boundary, were analyzed and compared with those of fifteen grass voles from non-polluted areas as part of an effort to assess genotoxic influences on grass voles in the dumpsite area. fifty metaphases per specimen were examined with particular attention to numerical and structural aberrations. two specimens from ... | 2008 | 18393568 |
| 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 |
| spirochaeta hebdomadis, the causative agent of seven day fever (nanukayami) : first paper. | a new species of spirochete which we have called spirochaeta hebdomadis has been described as the specific etiological agent of seven day fever, a disease prevailing in the autumn in fukuoka and other parts of japan. this spirochete is distinguishable from spirochaeta icterohaemorrhagiae to which it presents certain similarities. young guinea pigs are susceptible to inoculation with the blood of patients and to pure cultures of the spirochete, and those developing infection exhibit definite symp ... | 1918 | 19868269 |
| studies of leptospira hebdomadis. | from the results of etiological study of the disease known as akiyami which prevails in the shida district of shizuoka province, we conclude that: 1. akiyami is an infectious disease caused by a leptospira. 2. the leptospira causing akiyami is very difficult to differentiate morphologically from leptospira icterohoemorrhagioe and leptospira hebdomadis. 3. the strains of leptospira isolated from cases of akiyami are of two types. one type, isolated from three of the sixteen cases, is highly virul ... | 1925 | 19869097 |
| different cross-reactivity of human and rodent sera to tula virus and puumala virus. | tula virus (tulv) and puumala virus (puuv) are hantaviruses carried by the bank vole (myodes glareolus) and european common vole (microtus arvalis), respectively. puuv is a causative agent of hemorrhagic fever with renal syndrome (hfrs), while tulv is thought to be apathogenic to humans. the n-terminal regions of the n proteins from tulv and puuv were expressed and applied as enzyme-linked immunosorbent assay (elisa) antigens. colonized japanese grass voles (microtus montebelli) and balb/c mice ... | 2010 | 20116854 |
| fine structure of the mandibular gland in japanese field vole (microtus montebelli). | the mandibular glands of the japanese field vole were examined by light microscopy, and transmission and scanning electron microscopies. the acinar cells contained light and coarse secretory granules, and reacted with pas and stained slightly with ab; they were considered to be seromucous in nature. the acinar epithelium was composed of light and dark cells containing many secretory granules. the intercalated duct cells consisted of light cells possessing a few dense granules. a few cytoplasmic ... | 2008 | 3542536 |
| [measurement of lactose concentrations in milk of microtus montebelli with methylamine reaction]. | concentrations of lactose in milk of microtus montebelli were measured with the method using with the methylamine reaction. in this method, a small amount of sample (0.5 g) was sufficient for assay, and reproducibility and sensitivity were excellent. this method was very useful for measuring of lactose concentrations in experimental small animals. the average lactose concentration in milk of microtus montebelli was 1.57g/100g, considerably low in comparison with the value of icr mice (2.70g/100g ... | 2009 | 2680531 |
| 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 |
| 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 |
| prey susceptibilities, prey utilization and variable attack efficiencies of ural owls. | to investigate the factors that influence prey utilization among predators with active prey, three series of experiments were performed in which ural owls (strix uralensis) searched for and attacked three prey species of wild mice, microtus montebelli, apodemus speciosus, and a. argenteus, in a large flight cage. over the whole study, owls attacked mice about ten times a night. the number of attacks on each prey species did not differ from that predicted by a random attack model. m. montebelli w ... | 1988 | 28311960 |
| retinal projections to the subcortical nuclei in the japanese field vole (microtus montebelli). | retinal projections in the japanese field vole (microtus montebelli) were determined by anterograde transport of horseradish peroxidase (hrp). injection of hrp into the unilateral vitreous body demonstrated that the terminal labeling of the optic projections was seen bilaterally in the suprachiasmatic nucleus (sch), the ventral (glv) and dorsal (gld) lateral geniculate nuclei, the intergeniculate leaflet (igl), the medial pretectal nucleus (ntom) of the pretectum (pt) and the superficial layer o ... | 1995 | 7556420 |
| immunohistochemical study of peptide-containing nerves in the gastrointestinal tract of the japanese field vole, microtus montebelli. | the distribution and relative frequency of nerves containing immunoreactivity for substance p (sp), vasoactive intestinal polypeptide (vip), gastrin-releasing polypeptide (grp), calcitonin gene-related peptide (cgrp), neuropeptide y (npy) and menthionine-enkephalin (menk) were studied by immunohistochemistry in the gastrointestinal tract of the herbivorous japanese field vole, microtus montebelli. | 1990 | 2240582 |
| anesthetic effects of a combination of medetomidine, midazolam and butorphanol on the production of offspring in japanese field vole, microtus montebelli. | pentobarbital sodium (somnopentyl) can induce surgical anesthesia with a strong hypnotic effect that causes loss of consciousness. animals have been known to die during experimental surgery under anesthesia with somnopentyl, causing it to be declared inadequate as a general anesthetic for single treatment. an anesthetic combination of 0.3 mg/kg medetomidine, 4.0 mg/kg midazolam and 5.0 mg/kg butorphanol (m/m/b:0.3/4/5) was reported to induce anesthesia for a duration of around 40 min in icr mice ... | 2016 | 27238159 |
| establishment of superovulation procedure in japanese field vole, microtus montebelli. | japanese field vole (microtus montebelli) is a wild-derived rodent and have unique characteristic. thus, these species have been expected as model animal. this study was performed to develop novel superovulation procedure for japanese field vole. first, when 30 iu pregnant mare's serum gonadotropin (pmsg) and 30 iu human chorionic gonadotropin (hcg) were administrated 48 hours apart, females showed higher response to hcg compared with three concentrations of pmsg. second, to effectively induce o ... | 2016 | 27118387 |
| polymorphic microsatellite dna markers in the field vole microtus montebelli. | | 1999 | 9919707 |
| effects of a soft diet and hypothyroidism on the oxidative capacity of the masseter muscle fibers of the young japanese field vole microtus montebelli. | effects of a soft diet (reduction in mastication activity: an exogenous factor) and hypothyroidism (endogenous factors) on the oxidative capacity of the masseter muscles in the young japanese field vole microtus montebelli, consisting only of fast-twitch oxidative (fo) fibers in the adult vole, was investigated histochemically and electron microscopically. oxidative enzyme activity and mitochondrial development in the muscle fibers were not affected by a soft diet, while they were suppressed by ... | 1998 | 9615621 |
| postnatal development of the masseter muscles in the japanese field vole microtus montebelli, with special attention to differentiation of the fast-twitch oxidative fiber. | postnatal development and differentiation of the masseter muscles consisting only of fast-twitch oxidative (fo) fibers in the adult japanese field vole microtus montebelli were studied using histochemical and electron microscopic techniques. the masseter muscles were composed of myotubes and muscle fibers at day 0 (birth day). most muscle cells showed the strong reaction for myosin atpase after both alkaline and acid preincubations. for nadh-dehydrogenase (nadh-dh), small granular diformazan dep ... | 1997 | 9450394 |
| pattern of x-y chromosome pairing in the japanese field vole, microtus montebelli. | pairing of x and y chromosomes at meiotic prophase in males of microtus montebelli was analyzed. the sex chromosomes form a synaptonemal complex at pachytene and end-to-end association at diakinesis-metaphase i in two species of the genus microtus (m. montebelli and m. oeconomus) only, while they do not pair at all in the other species of this genus that have been studied so far. these data confirm that m. montebelli and m. oeconomus are very closely related in their origin. it is suggested that ... | 1997 | 9449794 |
| effect of hypotaurine on in vitro fertilization and production of term offspring from in vitro-fertilized ova of the japanese field vole, microtus montebelli. | the present study was proposed to establish new in vitro fertilization (ivf)-embryo transfer techniques for wild mammals. we demonstrated that ivf of the japanese field vole, microtus montebelli, is improved by hypotaurine, and that ivf vole embryos can develop to normal offspring after transfer to recipient females. the rate of ivf was significantly increased when 0.1 or 1 mm of hypotaurine was added during sperm preincubation and fertilization (p < 0.05). preincubation of spermatozoa with 1 mm ... | 1996 | 8835384 |
| [brain deformation caused by hyperplasia molar teeth (macrodonts) in the japanese field vole (microtus montebelli)]. | protrusion of hyperplastic upper molar teeth (macrodonts) into the cranial cavity was observed in the japanese field vole. protrusions of the upper molars occurred on both sides, but were large on the left than on the right. the teeth invaded the cranial cavity and brain parenchyma. large concavities on the ventral side of the brain were interposed between the lateral olfactory tract and the optic tract. invation by one macrodont reached the basal nuclei, hypothalamic and thalamic nuclei. the br ... | 1995 | 7498346 |
| pink-eyed dilution, a coat color mutation in the japanese field vole (microtus montebelli). | inheritance of dilute coat color with pink eye in the japanese field vole (microtus montebelli) was investigated by mating of the dilute mutant with a normal agouti vole and a white vole. as the results, it was cleared that an autosomal recessive gene p is responsible for the pink-eyed dilution in m. montebelli. | 1991 | 1915604 |
| postnatal development of the stomach in the japanese field vole, microtus montebelli. | | 1988 | 3052170 |
| postnatal development of intestinal villi in the field vole (microtus montebelli): a scanning electron microscopic study. | | 1983 | 6358986 |
| [occurrence of white japanese field vole (microtus montebelli) in the laboratory]. | some field voles with a white coat color were found in the breeding process in the laboratory, originated from a wild population captured in the riverside of the arakawa in okegawa, saitama prefecture in japan. they had been raised in a room and fed with pelleted feed for herbivore. an attempt was made to analyze their breeding records and mode of inheritance for the white coat color. as a result, the average litter size was 3.80 +/- 1.52, and the age of the first birth was 121 +/- 46.8 in days. ... | 1982 | 6762967 |
| [breeding and rearing of japanese field voles (microtus montebelli milne-edwards) and hungarian voles (microtus arvalis pallas) as new herbivorous laboratory animal species]. | microtus species are very useful as experimental small animals with herbivorous characteristics. in this report, to approach establishment of the use of japanese field voles (m. montebelli) and hungarian voles (m. arvalis) as experimental animals, the biological characteristics, breeding methods and reproductive performance of these animal species were comparatively investigated. the number of chromosomes of m. arvalis is 12n = 46, differing from those of m. montebelli, 2n = 30. the breeding and ... | 1982 | 6754391 |
| morphological and histological studies on the gastric mucosa on the japanese field vole, microtus montebelli montebelli. | | 1981 | 7045473 |
| spontaneous intestinal constipation of the japanese field vole (microtus montebelli) in a laboratory colony. | | 1980 | 7022230 |
| [morphology of the scent gland in the vole]. | the presence of the scent glands were examined macroscopically and histologically in the japanese vole, microtus montebelli and the hungarian vole, microtus arvalis. a pair of scent glands were observed on the buttocks of the japanese vole as the oval nodules with yellowish colored skin. the size of the glands was larger in males than in females. histologically, the glands were composed of the aggregation of many acini of sebaceous glands. the epidermis above the scent glands were thicker than t ... | 1993 | 8253141 |
| sem study on the dorsal lingual surface of microtus montebelli. | the dorsal lingual surface of microtus montebelli was examined by scanning electron microscopy (sem). the filiform papillae were distributed over the entire dorsal surface of the tongue. the filiform papillae notably differed in morphology by their location on the tongue and could be classified into 4 types: 1) simple conical papillae, 2) true filiform papillae, 3) giant conical papillae, and 4) saw-like papillae. the fugiform papillae were present rounded bodies scattered over the anterior dors ... | 1999 | 10565199 |
| fermentation and vfa production in the esophageal sac of microtus montebelli fed different rations. | | 1981 | 7033616 |
| assisted reproductive technologies in microtus genus. | microtus genus is one of the experimental animals showing unique characteristics, and some species have been used as various research models. in order to advance the utilization of microtus genus, the development of assisted reproductive technologies (arts) is a key point. this review introduces recent progress in the development of arts for microtus genus, especially microtus montebelli (japanese field vole). | 2019 | 30996675 |