| selenium accumulation in mammals exposed to contaminated california irrigation drainwater. | in may 1984, 332 mammals of 10 species were collected at kesterson reservoir (san joaquin valley, merced co., ca), which had received selenium-laden irrigation drainwater, and at the nearby volta wildlife area, which had not. the study concentrated on the california vole (microtus californicus); 88 were taken at kesterson, 89 at volta. mean selenium concentrations in livers were as much as 522 times higher at kesterson. there were species-to-species differences at kesterson; higher selenium conc ... | 1987 | 3685946 |
| the effect of flea control on yersinia (pasteurella) pestis antibody rates in the california vole, microtus californicus, and its epizootiological implications. | the effects of flea control on the prevalence of (pasteurella) pestis antibody rates in the california vole, microtus californicus, were studied in san mateo county, california, usa. in this area, which had shown antibody prevalence rates of 50% or more during epizootics in previous years, continuous flea control measures reduced the antibody rate to virtually zero and held it at that level for 12 months, although a nearby area showed an incidence of 40-80% seropositive voles for 5 months during ... | 1971 | 5316910 |
| short report: prevalence of hantavirus infection in rodents associated with two fatal human infections in california. | rodents living near two fatal human cases of hantavirus pulmonary syndrome in california were surveyed for evidence of hantavirus infection. seventeen (15%) (14 peromyscus maniculatus and one each of p. truei, eutamias minimus, and microtus californicus) of 114 rodents tested had evidence (enzyme-linked immunosorbent assay or polymerase chain reaction) of hantavirus infection. this suggests that peromyscus mice, and p. maniculatus in particular, may be the reservoir for the virus causing this ne ... | 1995 | 7872450 |
| isla vista virus: a genetically novel hantavirus of the california vole microtus californicus. | prospect hill virus (ph) was isolated from a meadow vole (microtus pennsylvanicus) in 1982, and much of its genome has been sequenced. hantaviruses of other new world microtine rodents have not been genetically characterized. we show that another microtus species (the california vole m. californicus) from the united states is host to a genetically distinct ph-like hantavirus, isla vista virus (ilv). the nucleocapsid protein of ilv differs from that of ph by 11.1% and a portion of the g2 glycopro ... | 1995 | 8847529 |
| role of small mammals in the ecology of borrelia burgdorferi in a peri-urban park in north coastal california. | the role of small mammals other than woodrats in the enzootiology of the lyme disease spirochete, borrelia burgorferi, was assessed in the peri-urban park. mammals were collected monthly from september through to april. following tick removal, the animals were tested for b. burgdorferi by culture of ear-punch biopsies. larvae and nymphs that were intermediate in morphology between ixodes spinipalpis and ixodes neotomae occurred on several species of rodents (peromyscus truei, peromyscus californ ... | 1997 | 9291589 |
| hantavirus (bunyaviridae) infections in rodents from orange and san diego counties, california. | during a screening program to determine the extent of hantavirus activity in orange and san diego counties, california, serum samples from 2,365 rodents representing nine genera and 15 species were tested for hantavirus antibodies. a reverse transcription-polymerase chain reaction on selected seropositive rodents was used to identify the specific hantavirus. rodents positive for sin nombre virus (snv) antibodies by western blot included 86 (9.1%) of 948 deer mice (peromyscus maniculatus), four ( ... | 1999 | 9988327 |
| pneumocystosis in wild small mammals from california. | cyst forms of the opportunistic fungal parasite pneumocystis carinii were found in the lungs of 34% of the desert shrew, notiosorex crawfordi (n = 59), 13% of the ornate shrew, sorex ornatus (n = 55), 6% of the dusky-footed wood rat, neotoma fuscipes (n = 16), 2.5% of the california meadow vole, microtus californicus (n = 40), and 50% of the california pocket mouse, chaetodipus californicus (n = 2) caught from southern california between february 1998 and february 2000. cysts were not found in a ... | 2001 | 11310900 |
| serum antibody responses in a population of microtus californicus and associated rodent species during and after pasteurella pestis epizootics in the san francisco bay area. | | 1964 | 14270072 |
| the detection of inapparent infections with pasteurella pestis in a microtus californicus population in the san francisco bay area. | | 1964 | 14270073 |
| detection and characterization of borrelia bissettii in rodents from the central california coast. | this is the first report of borrelia burgdorferi sensu lato in rodents from san luis obispo county, with most isolates obtained from a previously unreported host, neotoma lepida thomas. b. burgdorferi sensu lato was identified in seven rodent species, including the california vole, microtus californicus peale; dusky-footed woodrat, neotoma fuscipes baird; desert woodrat, neotoma lepida thomas; brush mouse, peromyscus boylii baird; california mouse, peromyscus californicus gambel; deer mouse, per ... | 2004 | 15311469 |
| ectoparasite diversity and exposure to vector-borne disease agents in wild rodents in central coastal california. | a survey of wild rodents was performed in the morro bay area of central coastal california to determine serological and polymerase chain reaction (pcr) prevalence of anaplasma phagocytophilum dumler, barbet, bekker, dasch, palmer, ray, rikihisa, and rurangirwa, borrelia burgdorferi johnson, schmidt, hyde, steigerwalt, and brenner, francisella tularensis mccoy, and yersinia pestis yersin; to describe the ectoparasitic fauna on important vector-borne disease hosts; and to determine whether pathoge ... | 2007 | 17427705 |
| modeling susceptible infective recovered dynamics and plague persistence in california rodent-flea communities. | plague persists as an enzootic in several very different rodent-flea communities around the world. in california, a diversity of rodent-flea communities maintains the disease, and a single-host reservoir seems unlikely. logistic regression of plague presence on climate and topographic variables predicts plague in many localities where it is absent. thus, a dynamic community-based analysis was needed. deterministic susceptible infective recovered (sir) models were adapted for plague and analyzed ... | 2010 | 20158333 |
| pathogen infection and exposure, and ectoparasites of the federally endangered amargosa vole (microtus californicus scirpensis), california, usa. | abstract we surveyed pathogens and ectoparasites among federally endangered amargosa voles (microtus californicus scirpensis) and sympatric rodents in tecopa hot springs, inyo county, california, december 2011-november 2012. we aimed to assess disease and detect possible spillover from or connectivity with other hosts within and outside the amargosa ecosystem. we assessed 71 individual voles and 38 individual sympatric rodents for current infection with seven vector-borne zoonotic pathogens and ... | 2014 | 25121407 |
| ectoparasites of microtus californicus and possible emergence of an exotic ixodes species tick in california. | california voles (microtus californicus peale) harbor fleas and ticks, may be infected with vector-borne pathogens, and could themselves suffer from disease and serve as a source of infection for people and other animals. here we summarize publications, museum archives, and recent records of ticks and fleas from california voles. there have been 18 flea species reported on california voles with geographic locations reported for 13. during recent statewide surveys, we found six flea species, with ... | 2015 | 26336217 |
| prevalence and potential impact of toxoplasma gondii on the endangered amargosa vole (microtus californicus scirpensis), california, usa. | we investigated the prevalence of toxoplasma gondii in 2011-15 to assess its potential threat on the endangered amargosa vole ( microtus californicus scirpensis) in california, us. surveillance was simultaneously performed on populations of syntopic rodent species. we detected antibodies to t. gondii in sera from 10.5% of 135 wild-caught amargosa voles; 8% of 95 blood samples were pcr-positive for the t. gondii b1 gene, and 5.0% of 140 sympatric rodent brain samples were pcr-positive. exposure t ... | 2017 | 27690194 |
| effect of an invasive plant and moonlight on rodent foraging behavior in a coastal dune ecosystem. | understanding how invasive plants may alter predator avoidance behaviors is important for granivorous rodents because their foraging can trigger ripple effects in trophic webs. previous research has shown that european beach grass ammophila arenaria, an invasive species in coastal california, affects the predation of other seeds by the rodents microtus californicus, peromyscus maniculatus, and reithrodontomys megalotis. this may be due to lower perceived predation risk by rodents foraging in clo ... | 2015 | 25679785 |
| histopathology and risk factors associated with neotrombicula microti infestation in the endangered amargosa vole (microtus californicus scirpensis). | the amargosa vole (microtus californicus scirpensis) is a profoundly endangered rodent found only in the central mojave desert, inyo county, california, us. in 2010, severe cases of trombiculiasis, caused by larval neotrombicula microti mites, were discovered among voles and sympatric small mammals. we evaluated amargosa voles and sympatric rodents for infestation with n. microti december 2011-november 2012 and evaluated histopathology of ear tissue from 13 actively n. microti-infested amargosa ... | 2015 | 25919470 |
| severe ulceronecrotic dermatitis associated with mite infestation in the critically endangered amargosa vole (microtus californicus scirpensis). | the entire range of the critically endangered amargosa vole (microtus californicus scirpensis) consists of less than 20 km(2) of riparian habitat in the amargosa river drainage of the mojave desert in southern california. in september 2010, deformities on ears and chiggers on the ears and genitalia were detected, with some individuals so severely affected that they were missing ear pinnae altogether. follow-up trapping was performed to document the presence of mites and mite-associated disease, ... | 2013 | 23458565 |
| small mammals cause non-trophic effects on habitat and associated snails in a native system. | legacy effects occur when particular species or their interactions with others have long-lasting impacts, and they are increasingly recognized as important determinants of ecological processes. however, when such legacy effects have been explicitly explored, they most often involve the long-term direct effects of species on systems, as opposed to the indirect effects. here, we explore how a legacy of small mammal exclusion on the abundance of a shrub, bush lupine (lupinus arboreus), influences t ... | 2011 | 21691854 |
| population dynamics of adult fleas (siphonaptera) on hosts and in nests of the california vole. | microtus californicus (peale, 1848) were live trapped or retrapped 887 times, and fleas were collected over a 2.5-yr period in the san francisco watershed and wildlife refuge. also, 179 m. californicus nests were collected monthly with observations to identify the environment of fleas. the ratio of the mean number of fleas per nest to the mean number collected on voles was 4.7:1 for malaraeus telchinus (rothschild, 1905), 13:1 for hystrichopsylla occidentalis linsdalei holland, 1957,9:1 for atyp ... | 2002 | 12495178 |
| effect of ectoparasite removal procedures on recapture of microtus californicus. | we tested the null hypothesis that anesthetizing meadow voles (microtus californicus) and brushing them vigorously for ectoparasites would have no effect on the later recapture of these voles. voles were trapped from 6 december 1993 to 10 january 1994 at faye slough wildlife area near eureka, humboldt county, california (usa). alternate trapped voles were anesthetized with ethyl ether and brushed vigorously for ectoparasites. there was no significant difference in the frequency of recapture nor ... | 1996 | 9359079 |
| condition and diet of cycling populations of the california vole, microtus californicus. | | 1971 | 5545554 |
| ecological studies of wild rodent plague in the san francisco bay area of california. vii. effects of plague in nature on microtus californicus and other wild rodents. | | 1962 | 14454083 |
| uptake of environmental contaminants by small mammals in pickleweed habitats at san francisco bay, california. | small mammals were live-trapped in pickleweed (salicornia virginica) habitats near san francisco bay, california in order to measure the uptake of several contaminants and to evaluate the potential effects of these contaminants on the endangered salt marsh harvest mouse (reithrodontomys raviventris). tissues of house mice (mus musculus), deer mice (peromyscus maniculatus), and california voles (microtus californicus) from nine sites were analyzed for chemical contaminants including mercury, sele ... | 1992 | 1586203 |