| behavioral, physiologic, and habitat influences on the dynamics of puumala virus infection in bank voles (clethrionomys glareolus). | populations of bank voles (clethrionomys glareolus) were monitored during a 4-year study in southern belgium to assess the influence of agonistic behavior, reproductive status, mobility, and distribution of the rodents on the dynamics of puumala virus (abbreviation: puuv; genus: hantavirus) infection. concordance was high between data from serologic testing and results of viral rna detection. wounds resulting from biting or scratching were observed mainly in adult rodents. hantavirus infection i ... | 2002 | 12194769 |
| mycobacterium microti infection (vole tuberculosis) in wild rodent populations. | mycobacterium microti (vole tuberculosis) infections in small wild mammals were first described more than 60 years ago in several populations in great britain. few studies of vole tuberculosis have been undertaken since then, and little is known about the relationship between m. microti isolates originating from different populations or at different times or of the prevalence of this infection in wild rodent populations, despite human cases of m. microti infections being increasingly reported. i ... | 2002 | 12202566 |
| characterisation of dna probes for the analysis of metallothionein gene expression in the bank vole (clethrionomys glareolus). | dna probes have been developed for subsequent use in monitoring the exposure of animals to heavy metal pollution in terrestrial environments using metallothionein (mt) gene expression in the bank vole (clethrionomys glareolus). three different bank vole sequences were characterised corresponding to the cdna and the genomic dna for mt-i and the genomic dna for mt-ii. nucleotide sequence analysis indicates that the coding sequences of the bank vole mt-i and mt-ii genes exhibit a very high degree o ... | 2002 | 12222609 |
| yeast-expressed puumala hantavirus nucleocapsid protein induces protection in a bank vole model. | hantaviruses are rodent-borne agents that cause severe human diseases. the coding sequences for the authentic and a his-tagged puumala hantavirus (puuv) nucleocapsid (n) protein were expressed in yeast (saccharomyces cerevisiae). n-specific monoclonal antibodies demonstrated native antigenicity of the two proteins. all bank voles vaccinated with the his-tagged n protein in freund's adjuvant (n=12) were defined as completely protected against subsequent virus challenge, based on the absence of vi ... | 2002 | 12297397 |
| rodent host specificity of european hantaviruses: evidence of puumala virus interspecific spillover. | in order to investigate rodent host specificity of european hantaviruses, experimental infection of colonized and wild-trapped rodents was performed. in addition to the natural rodent reservoir, clethrionomys glareolus, puumala hantavirus (puuv) could infect colonized microtus agrestis and lemmus sibiricus, but not syrian hamsters or balb/c mice. neither c. glareolus, nor m. agrestis, could be readily infected by tula hantavirus (tulv). wild-trapped apodemus flavicollis and a. agrarius, the natu ... | 2002 | 12376967 |
| hantaviruses in estonia. | human serum samples collected from healthy individuals in 14 counties were screened by elisa in order to investigate the presence of hantavirus infections in estonia. out of 1,234 serum samples, 124 were found positive for hantavirus-specific igg and were subsequently serotyped by a focus reduction neutralization test. a total of 112 samples neutralized at least one of the examined hantaviruses-puumala (puuv), saaremaa (saav), dobrava (dobv), hantaan, and seoul viruses-and thereby, the focus red ... | 2002 | 12376968 |
| evidence for a relationship between cage stereotypies and behavioural disinhibition in laboratory rodents. | cage stereotypies-abnormal, repetitive, unvarying and apparently functionless behaviours-are common in many captive animals, sometimes resulting in self-injury or decreased reproductive success. however, a general mechanistic or neurophysiological understanding of cage stereotypies has proved elusive. in contrast, stereotypies in human mental disorder, or those induced by drugs or brain lesions, are well understood, and are thought to result from the disinhibition of behavioural selection by the ... | 2002 | 12385793 |
| dinara - new natural focus of hemorrhagic fever with renal syndrome in croatia. | to investigate the characteristics and determine risk factors for hantanvirus infection in natural focus of hemorrhagic fever with renal syndrome (hfrs) on the dinara mountain, where outbreak of disease emerged among croatian soldiers in 1995, and to describe the features of hfrs acquired on the dinara mountain and determine the scale of the largest hfrs epidemic so far in croatia. | 2002 | 12402400 |
| epidemiologic characteristics and military implications of hemorrhagic fever with renal syndrome in croatia. | to analyze epidemiologic characteristics of hemorrhagic fever with renal syndrome in croatia, including military implications of the disease and measures for its prevention. | 2002 | 12402401 |
| prevalence of coinfection with francisella tularensis in reservoir animals of borrelia burgdorferi sensu lato. | studies on lyme borreliosis and other tick-borne zoonoses in the austrian and slovakian borderland, a region endemic for tularemia, revealed a relatively high prevalence of infection with borrelia burgdorferi s.l. and francisella tularensis in small terrestrial mammals, as well as in the ticks, during a one-year survey. the occurrence of coinfection with the agents of lyme borreliosis and tularemia was assessed in different species of rodents. | 2002 | 12422587 |
| distribution of hantavirus foci in belgium. | during 1999 and 2000, we performed rodent captures on 15 sites all over belgium to evaluate the presence of hantaviruses in local rodent populations. viral antibody and rna detection was performed by elisa/focus reduction neutralisation test and rt-pcr, respectively. we found hantavirus-positive rodents on 13 out of 15 trapping sites and 3 rodent species were found positive for hantavirus infection. apart from puumala virus that was carried by clethrionomys glareolus, 2 additional rodent species ... | 2002 | 12443796 |
| properties of bacillus thuringiensis isolated from bank voles. | to assess the properties of b. thuringiensis naturally occurring in the intestines of bank voles. | 2003 | 12492924 |
| puumala hantavirus infection in humans and in the reservoir host, ardennes region, france. | we compared the occurrence of nephropathia epidemica cases, over a multi-annual population cycle, in northeastern france with the hantavirus serology for bank voles captured in the same area. we discuss hypotheses to explain the pattern of infection in both humans and rodents and their synchrony. | 2002 | 12498675 |
| [detection of natural foci of babesiosis and granulocytic ehrlichiosis in russia]. | the use of microscopy, infection of golden hamsters and the polymerase chain reaction made it possible to find out that about 30% of common red-backed voles (clethrionomys glareolus), inhabiting the taiga forests of the southern part of the western urals (the chusovskoi district of the perm region), were infected with babesia microti and simultaneously (a third of them) with ehrlichia (cytoecetes) phagocytophila, the causative agent of granulocytic ehrlichiosis. the sequencing of 18s rdna of str ... | 2002 | 12506622 |
| [genetic efficacy of low doses of ionizing radiation in chronically-irradiated small mammals]. | earlier we have established the genetic effects of low dose chronic irradiation in bank vole (somatic and germ cells, embryos), in pond carp (fertilized eggs, embryos, fry) and in laboratory mice (somatic and germ cells) in the range of doses from near-background to 10 cgy. these low dose effects observed in mammals and fish are not expected from extrapolation of high dose experiments. for understanding reasons this discrepancy the comparative analysis of genetic efficiency of low dose chronic i ... | 2002 | 12530144 |
| seasonal dynamics of anaplasma phagocytophila in a rodent-tick (ixodes trianguliceps) system, united kingdom. | we investigated the reservoir role of european wild rodents for anaplasma phagocytophila using polymerase chain reaction (pcr) analysis of blood collected from individually tagged rodents captured monthly over 2 years. the only tick species observed in the woodland study site was ixodes trianguliceps, and ruminant reservoir hosts were not known to occur. a. phagocytophila infections were detected in both bank voles and wood mice but were restricted to periods of peak nymphal and adult tick activ ... | 2003 | 12533283 |
| the wood mouse is a natural host for murid herpesvirus 4. | infection of laboratory mice by the murid herpesvirus 4 (mhv-4) is a much studied model system for gammaherpesvirus pathogenesis. little, however, is known about its natural host range, epidemiology and pathogenesis outside the laboratory. we have studied mhv-4 infection in free-living murids in the uk. using a combination of serology and pcr analysis, we found that mhv-4 was endemic in wood mice (apodemus sylvaticus) but not in two species of voles (clethrionomys glareolus, microtus agrestis). ... | 2003 | 12533706 |
| bartonella infection in sylvatic small mammals of central sweden. | sylvatic small mammals were captured in rural habitats near uppsala, sweden, to measure the prevalence of bartonella infections, characterize bacterial isolates and identify their host range, and increase our understanding of host-pathogen ecology. during 7 nights of trapping at 3 localities, 236 small mammals were captured (trap success 30%). bartonella were isolated from bloods of apodemus flavicollis (19 of 110 tested), apodemus sylvaticus (6/25), clethrionomys glareolus (9/60), microtus agre ... | 2003 | 12613756 |
| association of borrelia afzelii with rodents in europe. | borrelia burgdorferi sensu lato (s.l.) is maintained in nature by complex zoonotic transmission cycles, involving a large variety of vertebrates as hosts and hard ticks of the genus ixodes as vectors. recent studies suggest that the genospecies of b. burgdorferi s.l. and sometimes their subtypes are propagated by different spectra of hosts, mainly birds and rodents. in order to test the concept of host-association, we analysed the relationships between borrelia genospecies, rodent hosts and i. r ... | 2003 | 12613759 |
| [structure and seasonal dynamics of the biotic community ectoparasites of the bank vole in the il'men'-volkhov lowland]. | a biodiversity, seasonal dynamics and parasite load of a single individual and local population of the bank vole (clethrionomys glareolus) were studied in coniferous and mixed forests of the ilmen-volkhov lowland (neighborhood of oskuy village, chudovo region, novgorod province) in the period from june 1999 till may 2002. the gero's traps were used for collecting the host. lines of traps stood in each place during 3-5 days and were checked twice a day. trapping of micromammalian hosts and collec ... | 2002 | 12624960 |
| the molecular evidence of babesia microti infection in small mammals collected in slovenia. | in europe, the zoonotic cycle of babesia microti has not been determined so far. recently, b. microti was detected in ixodes ricinus ticks in slovenia by using molecular methods. in order to investigate the mammalian hosts of b. microti in slovenia we collected 261 small mammals representing 11 species. they were tested for the presence of babesial parasites with a pcr assay based on the nuclear small subunit rrna gene (nss-rdna). the bank vole (clethrionomys glareolus) and yellow-necked mouse ( ... | 2003 | 12636348 |
| [detection of hantavirus antigen in rodents in the czech republic]. | the work is based on the hitherto implemented examinations of lungs of rodents from the territory of the czech republic for the presence of hantavirus antigen. for detection of a species specific antigen the elisa set hantagnost from the poliomyelitis institute in moscow was used. a total of 1494 micromammalia of 15 species caught in 1991-2001 were examined. the hantavirus antigen was detected in the lungs of 101 individuals (6.8%) whereby representatives of the species microtus arvalis predomin ... | 2003 | 12647557 |
| molecular characterization of m1146, an american isolate of ljungan virus (lv) reveals the presence of a new lv genotype. | ljungan virus (lv) is a suspected human pathogen recently isolated from bank voles in sweden. this study describes the genetic characterization of a virus, m1146, which was isolated in 1962 from another vole species (microtus montanus), trapped in oregon, usa. based on antigenic properties, m1146 was postulated previously as a putative member of the family picornaviridae: the near complete genomic sequence verifies that m1146 is a member of the picornaviridae, most closely related to lvs isolate ... | 2003 | 12655084 |
| distribution of puumala hantavirus in denmark: analysis of bank voles (clethrionomys glareolus) from fyn and jutland. | the majority of hantaviral infections in denmark since 1957 have occurred on the island of fyn. we have recently shown the presence of puumala hantavirus (puuv) in bank voles (clethrionomys glareolus) on fyn. to learn more about the distribution and prevalence of puuv in denmark, 310 small mammals, belonging to six rodent and two insectivore species, were trapped in four localities on fyn and three localities on the jutland peninsula (mainland denmark), where only a few cases of nephropathia epi ... | 2002 | 12656129 |
| immunolocalization of pthrp in the sublingual glands of three mammals. | the present study deals with immunohistochemical localization of pthrp in sublingual glands of white mouse, bank vole, and common vole. pthrp immunoreactivity was observed in epithelial cells of striated, interlobular and main excretory ducts of the salivary glands in all the three animal species tested. however, we found no positive reaction for pthrp in epithelial cells of the intercalated ducts. in striated duct cells, the reaction intensity was species-dependent. in bank vole and common vole ... | 2003 | 12705476 |
| exposure of small mammals, in particular the wood mouse apodemus sylvaticus, to pesticide seed treatments. | field exposure of small mammals to fungicide-treated wheat seed was investigated over three weeks following drilling on fields near york, united kingdom. seed consumption by small mammals trapped on and immediately adjacent to the drilled fields was quantified by measuring the amount of seed in the stomach. in addition, exposure to one seed-treatment, fluquinconazole, was quantified by measuring residues of the fungicide in the stomach, liver, and intestine. the wood mouse, apodemus sylvaticus, ... | 2003 | 12729225 |
| development of type 1 diabetes in wild bank voles associated with islet autoantibodies and the novel ljungan virus. | wild bank voles (clethrionomys glareolus) may develop diabetes in laboratory captivity. the aim of this study was to test whether bank voles develop type 1 diabetes in association with ljungan virus. two groups of bank voles were analyzed for diabetes, pancreas histology, autoantibodies to glutamic acid decarboxylase (gad65), ia-2, and insulin by standardized radioligand-binding assays as well as antibodies to in vitro transcribed and translated ljungan virus antigens. group a represented 101 tr ... | 2003 | 12745669 |
| aromatase expression and role of estrogens in male gonad : a review. | the ability of the testis to convert irreversibly androgens into estrogens is related to the presence of a microsomal enzymatic complex named aromatase, which is composed of a specific glycoprotein, the cytochrome p450 aromatase (p450arom) and an ubiquitous reductase. the aromatase gene is unique in humans and contained 18 exons, 9 of them being translated. in the rat testis we have immunolocalized the p450arom not only in leydig cells but also in germ cells and especially in elongated spermatid ... | 2003 | 12747806 |
| [identification of puumala like viruses in china]. | to confirm if puumala like viruses exist in china. | 2003 | 12870020 |
| adaptation of puumala hantavirus to cell culture is associated with point mutations in the coding region of the l segment and in the noncoding regions of the s segment. | we previously developed a model for studies on hantavirus host adaptation and initiated genetic analysis of puumala virus variants passaged in colonized bank voles and in cultured vero e6 cells. with the data presented in this paper, the sequence comparison of the wild-type and vero e6-adapted variants of puumala virus, strain kazan, has been completed. the only amino acid substitution that distinguished the two virus variants was found in the l protein, ser versus phe at position 2053. another ... | 2003 | 12885898 |
| hantavirus antibody occurrence in bank voles (clethrionomys glareolus) during a vole population cycle. | puumala virus, genus hantavirus, is the etiologic agent of nephropathia epidemica, a mild form of hemorrhagic fever with renal syndrome. the bank vole (clethrionomys glareolus) is the natural reservoir species of this hantavirus. we initiated sampling of bank voles at sites of recently identified human nephropathia epidemica cases and paired control sites in the fall of 1995 in coastal areas of northern sweden. sites were trapped annually in spring and fall until 1999. prevalence of antibody to ... | 2003 | 12910756 |
| experimental infection of clethrionomys glareolus and apodemus flavicollis with tick-borne encephalitis virus. | | 1963 | 14062331 |
| hantavirus infections in europe. | hantaviruses are enveloped rna viruses each carried by a specific rodent species. three hantaviruses, puumala, dobrava, and saaremaa viruses, are known to cause haemorrhagic fever with renal syndrome. in europe. puumala causes a generally mild disease, nephropathia epidemica, which presents most commonly with fever, headache, gastrointestinal symptoms, impaired renal function, and blurred vision, whereas dobrava infections often also have haemorrhagic complications. there are few available data ... | 2003 | 14522264 |
| tick-host-borrelia population interactions: long-term records in eastern europe. | during 10 spring and summer seasons (1992-2001), the dynamics of the epizootic process in natural foci were studied in taiga forests of the pre-ural region, russia. in these foci, borrelia garinii, borrelia afzelii and tick-borne encephalitis (tbe) virus circulate transmitted by their main vector tick, ixodes persulcatus. main parameters of the epizootic process were calculated for each season. in three seasons (1993, 1996, and 1999) all parameters characterizing the abundance of unfed nymphs an ... | 2002 | 14570135 |
| borrelia burgdorferi s.l. in ixodes ricinus (acari: ixodidae) ticks collected from vegetation and small rodents in recreational areas of the city of poznań. | during 1998-1999, ixodes ricinus (l.) populations were investigated in three different biotopes (deciduous, mixed, coniferous forest) situated in popular recreational areas in poznań, poland. in total, 1,123 questing ticks (1,002 nymphs, 69 males, 52 females) were collected by flagging vegetation. additionally, in 1998 between may and september small rodents were trapped and inspected for feeding ticks. altogether, 213 rodents of three species: apodemus agrarius pall., a. flavicollis melchior, c ... | 2003 | 14596285 |
| preliminary molecular characterization of cryptosporidium parvum isolates of wildlife rodents from poland. | isolates of cryptosporidium were collected from 3 species of woodland and field rodents (clethrionomys glareolus, microtus arvalis, and apodemus flavicollis) and were characterized by polymerase chain reaction amplification and sequencing of fragments of the oocyst wall protein (cowp) gene and of the 18s ribosomal rna gene. sequence analysis of these markers revealed that the animals were infected with c. parvum, and that the genotype involved was almost identical to the mouse genotype previousl ... | 2003 | 14627156 |
| genetic similarity of puumala viruses found in finland and western siberia and of the mitochondrial dna of their rodent hosts suggests a common evolutionary origin. | a total of 678 small mammals representing eight species were trapped in western siberia in 1999-2000 and assayed for the presence of hantaviruses. eighteen animals, all clethrionomys species, were antigen positive by enzyme-linked immunosorbent assay (elisa). small and medium genome segments were recovered by rt-pcr from six samples from clethrionomys glareolus and three from clethrionomys rufocanus. sequence comparison and phylogenetic analysis revealed that these hantaviruses were puumala viru ... | 2003 | 14636686 |
| biological characterisation of cryptosporidium parvum isolates of wildlife rodents in poland. | the study was undertaken to characterise the c. parvum isolates originating from naturally infected woodland and field rodents: clethrionomys glareolus (cg), apodemus flavicollis (af) and microtus arvalis (ma). we found that the measurements of oocyst dimensions and oocyst morphology did not allow distinction between the parasite isolates from the 3 rodent species. the mean dimensions were: for cg 4.67 x 4.21, for af 4.65 x 4.14 and for ma 4.66 x 4.16. these 3 groups of isolates have produced si ... | 2003 | 14677907 |
| two-year study of examination of blood from wild rodents for the presence of antiborrelian antibodies. | the aim of our work was to find the positivity rate of antibodrrelian antibodies (igg) in wild-living rodents in a locality situated in north moravia, czech republic. results of a survey for heart rinses (172) and sera (2) antibodies to borrelia burgdorferi sensu lato (s.l.) from 6 species of 174 wild rodents from the northern part of the czech republic are presented. samples were obtained in 2001-2002 at one locality (studenka, 49 degrees 44', 18 degrees 05'). host samples included yellow-necke ... | 2003 | 14677912 |
| type 1 diabetes in swedish bank voles (clethrionomys glareolus): signs of disease in both colonized and wild cyclic populations at peak density. | colonized bank voles (clethrionomys glareolus) originating from sweden developed type 1 diabetes. animals became polydipsic, glucosuric, and hyperglycemic and gradually developed a lethal ketoacidosis. pancreas in animals with end-stage disease showed total destruction of islet cells. interestingly, also a high proportion of wild bank voles in cyclic populations that were trapped at (or close to) the cyclic population density peak frequently showed high blood glucose levels and pathological gluc ... | 2003 | 14679053 |
| human hantavirus infections, sweden. | the prevalent human hantavirus disease in sweden is nephropathia epidemica, which is caused by puumala virus and shed by infected bank voles (clethrionomys glareolus). to evaluate temporal and spatial patterns of this disease, we studied 2,468 reported cases from a highly disease-endemic region in northern sweden. we found that, in particular, middle-aged men living in rural dwellings near coastal areas were overrepresented. the case-patients were most often infected in late autumn, when engaged ... | 2003 | 14718081 |
| analysis of genetic relationships and antimicrobial susceptibility of escherichia coli isolated from clethrionomys glareolus. | eleven strains of escherichia coli were isolated from 54 bank voles living in the lomza landscape park of the narew river valley, indicating that e. coli is not common in the alimentary tract of these mammals. on the basis of pulsed-field gel electrophoresis and computer-assisted analysis, the isolates were grouped into six genotypes at similarities of 39%. chromosome length of e. coli under study differed by as much as 900 kb, ranging 2.7-3.6 mb. all strains were susceptible to amikacin and cip ... | 2003 | 14747972 |
| [structure and seasonal dynamics of an ectoparasite community on the common shrew (sorex araneus) in the il'men'-volkhov lowland]. | species composition, seasonal dynamics, and a load of ectoparasites per individual and population of the common shrew sorex araneus have been examined in coniferous and mixed forests of the ilmen'-volkhov lowland (a neighbourhood of oskuy village, chudovo district, novgorod province) during the period 1999-2003. trapping of mammals was carried monthly, with exception of few accidental gaps. the gero traps were used for catching micromammalian hosts. the lines of trap were checked 2 times a day, ... | 2003 | 14964844 |
| microarray technology for identification and distinction of hantaviruses. | dna microarrays combine high-precision technology with advanced molecular biology to achieve high-throughput screening of dna fragments. in this study, we investigated the potential of the cdna microarray technique to identify and discriminate pcr derived amplicons from genetically highly similar viruses. the wide range of sequence variation among hantaviruses makes them suitable as a model for this purpose. the hantaviruses, carried by rodents, cause several hundred thousand cases of severe hum ... | 2004 | 14981768 |
| immunoglobulin g antibodies to borrelia burgdorferi in game animals and small mammals in eastern slovakia. | in a survey of game animals and small mammals, the sera of 185 animals were examined for the presence of immunoglobulin g antibodies to the spirochete borrelia burgdorferi sensu lato, which causes lyme borreliosis. these animals comprised 59 fallow deer (dama dama), 56 mouflons (ovis musimon) and 70 small mammals of six different species. the sera of the fallow deer and the mouflons were examined by indirect haemagglutination assay. the sera of the small mammals were examined by modified enzyme- ... | 2003 | 15005560 |
| [puumala and dobrava viruses in the northeastern and central regions of bosnia]. | bosnia and herzegovina has been known as a highly endemic region for hantavirus infections for more than 50 years. previous studies have shown that at least two different hantaviruses, the murine dobrava (dob) and avricoline puumala (puu) viruses, each carried by a different rodent species, have been circulating in the area. however, there is little information on rodent population density fluctuations in bosnia over the past years as well as on the ratio of puumala to dobrava infection in human ... | 2003 | 15011464 |
| [what is new in the epidemiologic characteristics of hemorrhagic fever with renal syndrome in croatia?]. | the aim was to describe epidemiologic characteristics of hemorrhagic fever with renal syndrome in croatia. | 2003 | 15011468 |
| saaremaa hantavirus in denmark. | most human hantavirus infections in denmark have been registered on the fyn island with puumala hantavirus hosted by clethrionomys glareolus as the causative agent. to search for other known european hantaviruses in denmark, we analyzed 101 apodemus spp. mice trapped on the lolland island. genome sequences of saaremaa hantavirus (saav) were recovered from one of the a. agrarius, thus suggesting saav presence in denmark. we also analyzed serum samples from a patient from lolland with a history of ... | 2004 | 15135745 |
| the zoonotic reservoir of borrelia burgdorferisensu lato in the mazury lakes district of north-eastern poland. | the roles of two species of rodents: the bank vole (clethrionomys glareolus) and the yellow-necked mouse (apodemus flavicollis) in maintaining the vector ixodes ricinus and borrelia burgdorferi s.l. were studied. more particularly, seasonal patterns of rodent abundance and infestation rate with i. ricinus ticks as well as the prevalence of b. burgdorferi s.l. and the two species b. garinii and b. afzelii were determined. the studies were carried out in woodlands at urwitałt near mikołajki on the ... | 2004 | 15147002 |
| [long-term dynamics of the epizootic process in natural foci of ixodid tick borreliosis in mountain taiga forests of the middle ural]. | during eleven spring-summer seasons (1992-2002), the dynamics of the epizootic process in natural foci of ixodid tick-borne borrelioses (itbb) were studied in taiga forests of the middle ural (perm province, russia). in these foci, borrelia garinii and b. afzelii circulate, and their main vector is the ixodes persulcatus tick. main parameters of the epizootic process were calculated for each season. in four seasons (1993, 1996, 1999 and 2002), the parameters characterizing the abundance of unfed ... | 2004 | 15174388 |
| rapid field test for detection of hantavirus antibodies in rodents. | puumala virus (puuv) is the causative agent of nephropathia epidemica, a mild form of haemorrhagic fever with renal syndrome. puuv is transmitted to humans via aerosolized excreta of the infected bank vole (clethrionomys glareolus). current methods for screening of the puuv prevalence among bank vole populations are laborious, combining sampling in the field and subsequent analyses in the laboratory. in order to facilitate animal testing, a new serological immunochromatographic rapid test was de ... | 2004 | 15188724 |
| flea-borne bartonella grahamii and bartonella taylorii in bank voles. | bartonella species are increasingly associated with a range of human and animal diseases. despite this, we have a poor understanding of the ecology and epidemiology of many species, especially those circulating in wild populations. previous studies have demonstrated that a diverse range of bartonella species are abundant in wild rodent populations; little is known regarding their modes of transmission, although both direct and indirect routes have been suggested. in this study, with bank voles ( ... | 2004 | 15200860 |
| detection of anaplasma phagocytophilum in animals by real-time polymerase chain reaction. | the aim of this study was to detect anaplasma phagocytophilum in wild and domesticated animals and to identify the phylogenetic relationships of different strains of this bacterium. we adapted six published conventional methods targeting 16s fragments for real-time polymerase chain reaction. initial screening of samples from 419 animals found 37 anaplasma positives, later confirmed with several different primers and a taqman probe. we also performed dna quantification and melting curve analysis. ... | 2004 | 15233638 |
| small mammals (insectivora, rodentia) as a potential source of chlamydial infection in east slovakia. | the presence of antibodies against chlamydophila (chlamydia) psittaci in small mammals (insectivora, rodentia) in the region of east slovakia are presented. the hosts were caught in several areas of slovakia in habitats with different levels of anthropogenic disturbance. research was carried out during 2000-2002. the authors examined 1,947 sera coming from 4 insectivore and 10 rodent species. each serum was examined by micromethod of complement binding reactions using antigen chlamydophila (chla ... | 2004 | 15236511 |
| characterization of tula virus from common voles (microtus arvalis) in poland: evidence for geographic-specific phylogenetic clustering. | tula virus (tulv), a recently identified arvicolid rodent-borne hantavirus, is harbored by the european common vole (microtus arvalis) in central russia and the czech and slovak republics. we report the isolation and characterization of this hantavirus from m. arvalis captured in poland, a country where human disease caused by hantaviruses has not been recognized. of 34 arvicolid rodents (24 clethrionomys glareolus, 9 m. arvalis, 1 pitymys sp.) captured in lodz and tuszyn, poland, during june to ... | 2004 | 15284484 |
| marked species and age-dependent differences in cell proliferation and neurogenesis in the hippocampus of wild-living rodents. | variations in the extent of adult neurogenesis and natural and experimental factors controlling it have been described in laboratory animals. the wide range of variation seen even within a species, the mouse, raises the question as to which rates of neurogenesis can be expected in natural populations. answering this question is important to evaluate the functional significance of adult neurogenesis under natural conditions and to define the factors controlling it. to address this issue, we inves ... | 2004 | 15390172 |
| frenkelia parasites in a small mammal community. dynamics of infection and effect on the host. | a community of small mammals, clethrionomys glareolus, arvicola terrestris, microtus arvalis, m. agrestis, m. subterraneus, apodemus spp. and sorex spp., was studied as hosts of frenkelia glareoli and f. microti in fronche-comté (france). they were monitored in spring, summer and autumn on an area of about 1,350 ha comprising open field, hedgerow network and forest. among 1,714 small mammals examined between july 1992 and october 1993, 47% (178/376) of c. glareolus, 9.9% (14/139) of a. terrestri ... | 2004 | 15490755 |
| identification of bartonella species in rodents, shrews and cats in denmark: detection of two b. henselae variants, one in cats and the other in the long-tailed field mouse. | small mammals and stray cats were trapped in two areas of north zealand, denmark, and their blood cultured for hemotrophic bacteria. bacterial isolates were recovered in pure culture and subjected to 16s rdna gene sequencing. bartonella species were isolated from five mammalian species: b. grahamii from microtus agrestis (field vole) and apodemus flavicollis (yellow-necked field mouse); b. taylorii from m. agrestis, a. flavicollis and a. sylvaticus (long-tailed field mouse); b. tribocorum from a ... | 2004 | 15511270 |
| granule cell number, cell death and cell proliferation in the dentate gyrus of wild-living rodents. | adult neurogenesis in the dentate gyrus occurs at species-specific levels. wood mice (apodemus flavicollis) show higher proliferation rates than laboratory mice and voles (clethrionomys glareolus, microtus subterraneus). we compare rates of cell death and proliferation and investigate if cell proliferation leads to the long-term recruitment of granule cells. granule and pyknotic cell numbers were estimated in wild-living rodents in different age classes and compared with laboratory mice of mixed ... | 2004 | 15610166 |
| anti-borrelia antibodies in rodents: important hosts in ecology of lyme disease. | data presented in this study focuses on the presence of anti-borrelia antibodies in small mammals from eastern slovakia during 2000-2003. the total seropositivity observed was 18.78% in rodents. amongst all species, the total seroprevalence in apodemus flavicolis was the highest (20.87%), followed by apodemus agrarius (19.58%) and clethrionomys glareolus (11.11%). however, the prevalence in apodemus flavicolis during the year 2000-2001 was higher (26.72%), which reduced to 10.60% in 2002-2003. t ... | 2004 | 15627326 |
| a comparison of wild-caught wood mice and bank voles in the intellicage: assessing exploration, daily activity patterns and place learning paradigms. | our previous work has revealed very high baseline neurogenesis in the dentate gyrus of wood mice as compared particularly to bank voles; a difference which may be related to learning capacity. this study explored whether the newly-developed intellicage system could be used to compare these species in simple spatial learning paradigms. the intellicage is essentially a group-housing cage that also allows continuous automatic recording of each individual's behaviour. seven wild-caught bank voles (c ... | 2005 | 15639172 |
| [structure of parasitic arthropod communities in forest small mammals]. | species composition and structure of ectoparasite arthropod communities were examined all year round six years in the bank vole clethrionomys glareolus, ural wood mouse apodemus uralensis and the common shrew sorex araneus in forests of the ilmen'-volkhov depression. in total, 4500 host samples have been examined and all ectoparasites have been collected. the species composition of ectoparasite community in small mammal species are as follows: the bank vole--29 insect, tick and mite species, the ... | 2004 | 15656091 |
| predator-induced synchrony in population oscillations of coexisting small mammal species. | comprehensive analyses of long-term (1977-2003) small-mammal abundance data from western finland showed that populations of microtus voles (field voles m. agrestis and sibling voles m. rossiaemeridionalis) voles, bank (clethrionomys glareolus) and common shrews (sorex araneus) fluctuated synchronously in 3 year population cycles. time-series analyses indicated that interspecific synchrony is influenced strongly by density-dependent processes. synchrony among microtus and bank voles appeared addi ... | 2005 | 15695211 |
| characterization of borrelia burgdorferi sensu lato isolated in moscow province--a sympatric region for ixodes ricinus and ixodes persulcatus. | the relationships between borrelia species and the vector ticks, ixodes persulcatus and ixodes ricinus were examined in a molecular epidemiological study. we conducted a survey in the moscow region which is a sympatric region for both species of tick. we examined 630 unfed i. ricinus and i. persulcatus, ticks collected from four different regions around moscow within an area of 250 km2. eighty-four ticks were culture positive (13.3%) and the prevalence rate varied in each region from 5.7% to 42. ... | 2005 | 15715174 |
| sheep grazing and rodent populations: evidence of negative interactions from a landscape scale experiment. | inter-specific competition, facilitation and predation influence herbivore assemblages, but no study has experimentally explored the interactions between large ungulates and small rodents. in a fully replicated, landscape scale experiment, we manipulated densities of domestic sheep in mountain pastures in norway. we then determined population growth and densities of rodents by live trapping in each of the areas with different sheep densities. we found that the (summer) population growth rate and ... | 2005 | 15726430 |
| identification of a new borrelia species among small mammals in areas of northern spain where lyme disease is endemic. | the role of small mammals as reservoir hosts for borrelia burgdorferi was investigated in several areas where lyme disease is endemic in northern spain. a low rate of infestation by ixodes ricinus nymphs was found in the small mammal populations studied that correlated with the near-absence of b. burgdorferi sensu lato in 184 animals tested and with the lack of transmission of b. burgdorferi sensu lato to i. ricinus larvae that fed on them. in contrast, questing ticks collected at the same time ... | 2005 | 15746336 |
| cluster of capillaria hepatica infections in non-commensal rodents from the canton of geneva, switzerland. | we trapped 664 rodents belonging to five non-commensal species in the canton of geneva, switzerland, and found a significant cluster of capillaria hepatica infections in three species in rural and urbanized areas of the northern part of the canton. c. hepatica infections were discovered in the yellow-necked mouse apodemus flavicollis (n=99) with an overall prevalence (op) of 7.0% and a clustered prevalence (cp) of 20%, in the bank vole clethrionomys glareolus (n=58, op 5.2%; cp 19%), and in the ... | 2005 | 15924224 |
| disruption of a host-parasite system following the introduction of an exotic host species. | the potential of biological invasions to threaten native ecosystems is well recognized. here we describe how an introduced species impacts on native host-parasite dynamics by acting as an alternative host. by sampling sites across an invasion front in ireland, we quantified the influence of the introduced bank vole (clethrionomys glareolus) on the epidemiology of infections caused by flea-transmitted haemoparasites of the genus bartonella in native wood mice (apodemus sylvaticus). bartonella inf ... | 2005 | 15977903 |
| identification of the pathological prion protein allotypes in scrapie-infected heterozygous bank voles (clethrionomys glareolus) by high-performance liquid chromatography-mass spectrometry. | cerebral formation of the pathological isoform of the prion protein (prp) is a crucial molecular event in prion diseases. the bank vole (clethrionomys glareolus) is a rodent species highly susceptible to natural scrapie. the prp gene of bank vole is polymorphic (met/ile) at codon 109. here we show that homozygous 109met/met voles have incubation times shorter than heterozygous 109met/ile voles after experimental challenge with three different scrapie isolates. an hplc-ms/ms method was optimized ... | 2005 | 16013608 |
| aromatase in testis: expression and role in male reproduction. | the mammalian testis serves two main functions: production of spermatozoa and synthesis of steroids, among them estrogens are the end products obtained from the irreversible transformation of androgens by aromatase (p450arom). in the rat the pattern of p450arom expression differs among the testicular somatic cell types according to age; in addition, we have shown that gonocytes, spermatogonia, spermatocytes (preleptotene, pachytene), spermatids and spermatozoa, represent an important source of e ... | 2005 | 16019206 |
| paradoxical rate-dependent effect of fluoxetine on captivity-induced stereotypies in bank voles. | treatment of stereotypies in human and animal clinics is still empirical due to our incomplete understanding of underlying mechanisms. as a consequence, experimental studies in controlled laboratory conditions are necessary. bank voles (clethrionomys glareolus), housed in barren laboratory cages, often develop stereotyped up-and-down jumping even before the age of 1 month. the aim of this study was to investigate how captivity-induced stereotypies respond to fluoxetine (prozac), a selective sero ... | 2005 | 16023277 |
| metals distribution and interactions in tissues of shrews (sorex spp.) from copper- and zinc-contaminated areas in poland. | to assess the risk from heavy metal accumulation to insectivorous species exposed to different pollutants, shrews [sorex araneus (linnaeus 1758) and sorex minutus (linnaeus 1766)] were collected in the olkuski ore region (oor; a zn and cd smelter area), legnicko-głogowski copper mine region (lgcr; a copper ore-mining area), and białowieza forest (bf; a control area). a few sites were chosen in each region and a total of 57 animals were collected from them. the liver and kidneys were dissected fr ... | 2005 | 16091604 |
| puumala virus in croatia in the 2002 hfrs outbreak. | hfrs is an endemic disease throughout croatia. the incidence of hfrs varies in a cyclic fashion, with peaks occurring every couple of years, coinciding with peaks in vole populations. puuv was shown to be dominant pathogen during the last hfrs outbreak in croatia in 2002. we focused our research on two newly discovered localities (okucani and nova gradiska) with a high number of reported hfrs cases and a significant increase in rodent population. puuv infection was verified in 84.2% of patients ... | 2005 | 16121366 |
| aromatase and oestrogens in human male germ cells. | the mammalian testis serves two main functions: production of spermatozoa and synthesis of steroids, among them oestrogens are the end products obtained from the irreversible transformation of androgens by aromatase (p450arom). up today p450arom has been demonstrated in male germ cells of all mammals so far studied (mice, rat, bank vole, bear, monkey). in man leydig cells and immature germ cells as well as ejaculated spermatozoa express a biologically active aromatase. moreover germ cells and sp ... | 2005 | 16128984 |
| the distribution of arsenic in the body tissues of wood mice and bank voles. | arsenic is accumulated by free-living small mammals, but there is little information on the resultant concentrations in different tissues other than liver and kidney. such information is important because the severity of toxicological effects may be related to the amount of arsenic accumulated in specific organs, and the availability of arsenic to predators is, in part, dependent on which tissues accumulate arsenic. the objective of this study was to quantify the arsenic concentrations and the p ... | 2005 | 16170450 |
| long-term development of the radionuclide exposure of murine rodent populations in belarus after the chernobyl accident. | as a determinant of the associated health risks, the behavior of radionuclides in natural ecosystems needs to be better understood. therefore, the activity concentration of various long-lived radionuclides released due to the chernobyl accident, and the corresponding contributions to the whole-body dose rate, was studied as a function of time in mammalian indicator species inhabiting the natural forest ecosystems of belarus, the bank vole (clethrionomys glareolus) and the yellow-necked mouse (ap ... | 2005 | 16215755 |
| a mathematical model for indirectly transmitted diseases. | we consider a mathematical model for the indirect transmission via a contaminated environment of a microparasite between two spatially distributed host populations having non-coincident spatial domains. the parasite is benign in a first population and lethal in the second one. global existence results are given for the resulting reaction-diffusion system coupled with an ordinary differential equation. then, invasion and persistence of the parasite are studied. a simplified model for the transmis ... | 2007 | 16216284 |
| piximus dxa with different software needs individual calibration to accurately predict fat mass. | to validate ge piximus2 dxa fat mass (fm) estimates by chemical analysis, to compare previously published correction equations with an equation from our machine, and to determine intermachine variation. | 2005 | 16222058 |
| [patterns of host-parasite interactions between the nematode heligmosomum mixtum (schulz, 1952) and the bank vole (clethrionomys glareolus schreber, 1780)]. | some aspects of the host-parasite interaction of the nematode heligmosomum mixtum and the bank vole have been studied. the dependence of infestation on the host sex, age and weight, the seasonal and annual abundance dynamics are investigated. it has been found that the bank vole is the main host of h. mixtum; the distribution of h. mixtum abundances in the host population is described by a negative binomial distribution model. the greatest infestation is characteristic for mature bank voles; mal ... | 2005 | 16316059 |
| hosts and pathogen detection for immature stages of ixodes ricinus (acari: ixodidae) in north-central spain. | to determine hosts of the immature stages of a southern population of ixodes ricinus, we trapped rodents and birds in an area of north-central spain in may-june and august-september of 1998 and 1999. the most frequently trapped rodents were apodemus sylvaticus (230 specimens) and clethrionomys glareolus (99), with a larval infestation prevalence of 49% and 81%, respectively (in spring) and 21% and 41% (in summer). c. glareolus was always more heavily parasitized by larvae (mean numbers 19.8 in s ... | 2005 | 16323055 |
| borrelia burgdorferi sensu stricto in yellow-necked mice and feeding ixodes ricinus ticks in a forest habitat of west central poland. | wild rodents and the subadult ixodes ricinus (l.) ticks infesting them were examined for the presence of borrelia burgdorferi johnson, schmid, hyde, steigerwalt & brenner s.l. in a sylvatic habitat in west central poland during may-september 2002. in total, 818 feeding ticks were recovered from 73 infested yellow-necked mice, apodemus flavicollis melchior; in addition, bank voles, clethrionomys glareolus schreber, were rarely captured and proved to be weakly parasitized. only 2.7% of a. flavicol ... | 2005 | 16363171 |
| hantavirus and arenavirus antibody prevalence in rodents and humans in trentino, northern italy. | the spatial and temporal distribution of hantavirus and arenavirus antibody-positive wild rodents in trentino, italy, was studied using immunofluorescence assays (ifa) in two long-term sites trapped in 2000-2003, and six other sites trapped in 2002. the overall hantavirus seroprevalence in the bank voles, clethrionomys glareolus (n=229) screened for puumala virus (puuv) antibodies was 0.4%, and that for apodemus flavicollis mice (n=1416) screened for dobrava virus (dobv) antibodies was 0.2%. ant ... | 2006 | 16371172 |
| habitat factors associated with bank voles (clethrionomys glareolus) and concomitant hantavirus in northern sweden. | puumala virus (puuv), genus hantavirus, causes nephropathia epidemica, a mild form of hemorrhagic fever with renal syndrome in humans. in this study, bank voles, the natural reservoir of puuv, were captured at locations of previous human puuv exposure and paired controls within a region of high incidence in northern sweden. the aim of the study was to evaluate the influence of environmental factors on the abundance of bank voles and the occurrence of puuv. the total number of voles and the numbe ... | 2005 | 16417427 |
| conversion efficiency of bank vole prion protein in vitro is determined by residues 155 and 170, but does not correlate with the high susceptibility of bank voles to sheep scrapie in vivo. | the misfolded infectious isoform of the prion protein (prp(sc)) is thought to replicate in an autocatalytic manner by converting the cellular form (prp(c)) into its pathogenic folding variant. the similarity in the amino acid sequence of prp(c) and prp(sc) influences the conversion efficiency and is considered as the major determinant for the species barrier. we performed in vitro conversion reactions on wild-type and mutated prp(c) to determine the role of the primary sequence for the high susc ... | 2006 | 16455657 |
| efficient transmission and characterization of creutzfeldt-jakob disease strains in bank voles. | transmission of prions between species is limited by the "species barrier," which hampers a full characterization of human prion strains in the mouse model. we report that the efficiency of primary transmission of prions from creutzfeldt-jakob disease patients to a wild rodent species, the bank vole (clethrionomys glareolus), is comparable to that reported in transgenic mice carrying human prion protein, in spite of a low prion protein-sequence homology between man and vole. voles infected with ... | 2006 | 16518470 |
| risk assessment of metals and organic pollutants for herbivorous and carnivorous small mammal food chains in a polluted floodplain (biesbosch, the netherlands). | a risk assessment was made for a carnivorous and a herbivorous food chain in a heavily polluted natural estuary (biesbosch), by determining the most critical pollutants and the food chain most at risk. exposure of food chains to metals, polycyclic aromatic hydrocarbons (pahs), and polychlorinated biphenyls (pcbs) was assessed by analyzing dietary concentrations, internal concentrations, and biomarkers of exposure. common shrew (sorex araneus) and bank vole (clethrionomys glareolus) were selected ... | 2006 | 16530312 |
| bovine tuberculosis (mycobacterium bovis) in british farmland wildlife: the importance to agriculture. | bovine tuberculosis (btb) is an important disease of cattle and an emerging infectious disease of humans. cow- and badger-based control strategies have failed to eradicate btb from the british cattle herd, and the incidence is rising by about 18%per year. the annual cost to taxpayers in britain is currently 74 million uk pounds. research has focused on the badger as a potential btb reservoir, with little attention being paid to other mammals common on farmland. we have conducted a systematic sur ... | 2006 | 16543179 |
| short report: dual infections with puumala virus and leptospira interrogans serovar lora in a bank vole (clethrionomys glareolus). | leptospirosis and hemorrhagic fever with renal syndrome are public health problems in croatia. diagnosis and epidemiology of these diseases are complicated because these two diseases are sympatric in certain areas. we describe a natural dual infection of puumala virus and a leptospire in a bank vole (clethrionomys glareolus). | 2006 | 16606994 |
| inference of cowpox virus transmission rates between wild rodent host classes using space-time interaction. | there have been virtually no studies of 'who acquires infection from whom' in wildlife populations, but patterns of transmission within and between different classes of host are likely to be reflected in the spatiotemporal distribution of infection among those host classes. here, we use a modified form of k-function analysis to test for space-time interaction among bank voles and wood mice infectious with cowpox virus. there was no evidence for transmission between the two host species, supporti ... | 2006 | 16618669 |
| new molecular data on mammalian hepatozoon species (apicomplexa: adeleorina) from brazil and spain. | molecular techniques were used to examine the phylogenetic relationships among hepatozoon species isolated from 13 foxes and 15 opossums from brazil, and from 15 dogs, 20 foxes, 45 rodents, and 330 domestic cats from spain. hemogregarine infection was confirmed by amplification of the 18s rrna gene and later sequencing. no hemogregarine infections were found in opossums. the prevalence of hepatozoon in canids ranged from 26.6% (symptomatic domestic dogs) to 90% (spanish foxes). four different h. ... | 2006 | 16629322 |
| a new puumala hantavirus subtype in rodents associated with an outbreak of nephropathia epidemica in south-east germany in 2004. | a micro-epidemic of hantavirus infections occurred in lower bavaria, south-east germany, starting in april 2004. while only three cases were registered from 2001 to 2003, a dramatically increased number of clinically apparent human hantavirus infections (n=38) was observed in 2004, plus seven additional cases by june 2005. to determine the reservoir responsible for the infections, a total of 43 rodents were trapped in lower bavaria. serological and genetic investigations revealed that puumala vi ... | 2006 | 16650330 |
| animal models of obsessive-compulsive disorder: rationale to understanding psychobiology and pharmacology. | animal models have shown progressive development and have undoubtedly proven their supportive value in ocd research. thus, various animal models have confirmed the importance of the 5-ht [72-74] and dopamine systems [104,111] in the neurobiology and treatment of ocd. given the neurochemical, emotional, and cognitive complexity of the disorder, how-ever, animal models are being used to investigate more and more complicated neurochemical and behavioral theories purported to underlie ocd. the lever ... | 2006 | 16650714 |
| genetic analysis of puumala hantavirus strains from austria. | sequences of the small (s) and the medium (m) genome segments of puumala hantavirus (puuv) were recovered from bank voles clethrionomys glareolus trapped at 2 locations, klippitztörl (carinthia) and ernstbrunn (lower austria). lung tissue samples from 12 rodents earlier found hantavirus antibody-positive were further screened for the presence of hantaviral n-antigen using immunoblotting. rna purified from 7 n-ag-positive samples was subjected to the reverse transcription-polymerase chain reactio ... | 2006 | 16798703 |
| genomic characterization of a novel poxvirus contributing to the decline of the red squirrel (sciurus vulgaris) in the uk. | the genome of a virulent squirrelpox virus (sqpv) isolate was characterized in order to determine its relationship with other poxviruses. restriction enzyme analysis suggested a genome length of approximately 158 kb, whilst sequence analysis of the two ends of the genome indicated a g + c composition of approximately 66 %. two contiguous stretches of 23 and 37 kb at the left-hand and right-hand ends of the genome, respectively, were sequenced allowing the identification of at least 59 genes cont ... | 2006 | 16847106 |
| prolonged survival of puumala hantavirus outside the host: evidence for indirect transmission via the environment. | the capability of rodent-borne viruses to survive outside the host is critical for the transmission dynamics within rodent populations and to humans. the transmission of puumala virus (puuv) in colonized bank voles (clethrionomys glareolus) was investigated and additional longevity studies in cell culture with puuv and tula (tulv) hantaviruses were performed. wild-type puuv excreted by experimentally infected donor bank voles was shown to be transmitted indirectly between rodents through contami ... | 2006 | 16847107 |
| [prevalence of ixodes ricinus infection with borrelia burgdorferi s.l.: seasonal and annual variations]. | the present study deals with the ecology of lyme borreliosis in northern poland. the complexity of environmental conditions are: (1) the presence of certain rodent hosts for the borrelia, (2) the seasonal patterns of abundance and infection rate of i. ricinus in the population of rodents and on vegetation, (3) the prevalence of b. burgdorferi s.l., b. garinii and b. afzelii. the long-term studies were carried out on a monthly basis from april to october (1998-2001) in woodlands at urwitałt near ... | 2004 | 16859032 |
| [the co-occurence of cryptosporidium parvum, giardia spp. and helminth infections in small rodent populations]. | during long-term (1998-2000) studies on rodent parasite populations in mazury lake district there were collected and analyzed data on co-occurrence of intestinal protozoa (cryptosporidium parvum, giardia spp.) and helminths. there were performed 178 autopsies of common vole microtus arvalis, 85 autopsies of yellow-necked mouse apodemus flavicollis and 386 autopsies of bank vole clethrionomys glareolus. positive effect of helminth infections was found in c. glareolus. voles infected with nematode ... | 2004 | 16859041 |
| [anoplura of rodents (rodentia) in northern poland]. | anoplura of rodents (rodentia) in northern poland. above 100 rodents belonging to 6 species (clethrionomys glareolus, microtus agrestis, m. arvalis, apodemus flavicollis, a. sylvaticus, mus musculus) caught in the various habitations were examined. the parasites found represented three species of anoplura: hoplopleura acanthopus, h. affinis and polyplax serrata. h. acanthopus appeard to be the most common parasite; it was found in all examined hosts, while mostly on the bank vole. | 2004 | 16859044 |
| [helminth fauna and steroid hormones concentration of wild rodents]. | fragmentation of the environment by natural barriers (lakes, mountain ranges) and human activities (towns, major roads, agriculture) can lead to isolate subpopulations of hosts. the study was based in mazury lake district in north-eastern poland, the region rich in forests, lakes, rivers and canals, which can create impassable barriers. population of bank voles (clethrionomys glareolus)--dominant woodland rodent--showed local differences in helminth communities in fragmented forest habitat. the ... | 2004 | 16865976 |
| diabetes and myocarditis in voles and lemmings at cyclic peak densities--induced by ljungan virus? | although it is well-documented from theoretical studies that pathogens have the capacity to generate cycles, the occurrence and role of pathogens and disease have been poorly empirically studied in cyclic voles and lemmings. in screening for the occurrence of disease in cyclic vole and lemming populations, we found that a high proportion of live-trapped clethrionomys glareolus, c. rufocanus, microtus agrestis and lemmus lemmus at high collective peak density, shortly before the decline, suffered ... | 2006 | 16868760 |