ribosomal dna variation within and between species of rodents, with emphasis on the genus onychomys.patterns of restriction-endonuclease site and length variation at the nuclear rdna locus (18s + 28s rrna gene complex) were examined in rodents. of the 164 restriction sites mapped for seven species, 22 were conserved (mapping to the 18s, 28s, and 5.8s genes and its1) in all three onychomys species as well as in mus musculus and in three closely related peromyscine rodents, peromyscus boylii, p. eremicus, and reithrodontomys megalotis. the nontranscribed spacer (nts) region revealed most of the ...19912002766
isolation of borrelia burgdorferi from neotoma fuscipes, peromyscus maniculatus, peromyscus boylii, and ixodes pacificus in oregon.the number of lyme disease cases in oregon has increased in recent years despite the fact that the pathogen, borrelia burgdorferi, has never been isolated in the state. rodent and tick surveys were undertaken in 1997 to isolate and characterize strains of b. burgdorferi from oregon and to identify potential reservoirs and vectors of lyme disease. borrelia burgdorferi was isolated from neotoma fuscipes, peromyscus maniculatus, p. boylii, and ixodes pacificus. both n. fuscipes and p. maniculatus w ...199910466976
arenavirus antibody in rodents indigenous to coastal southern california.the purpose of this study was to extend our knowledge on the geographic and natural rodent host ranges of new world arenaviruses in california. sera from 1,094 sigmodontine and 112 murine rodents were tested for antibody against whitewater arroyo and amapari viruses. antibody was found in 55 (4.6%) of the 1,206 rodents: 4 from northwestern san diego county, 3 from los angeles county, and 48 from orange county. the antibody-positive rodents included 8 (7.8%) of 103 neotoma fuscipes, 1 (0.6%) of 1 ...200011289675
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 ...200111310900
genetic identification and characterization of limestone canyon virus, a unique peromyscus-borne hantavirus.hantaviruses, family bunyaviridae, are rodent-borne rna viruses that can cause hantavirus pulmonary syndrome (hps) in various regions of the americas. a coevolutionary relationship exists between hantaviruses and their specific rodent reservoir hosts; the phylogeny of the viruses generally matches that of the rodents. there are several peromyscus-borne hantaviruses, including sin nombre virus, the most common cause of hps in north america. this report describes the genetic detection and characte ...200111485402
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 ...200415311469
genetic diversity of hantaviruses in mexico: identification of three novel hantaviruses from neotominae rodents.a variety of hantaviruses are harbored by rodents in north and south america, some of which can cause hantavirus pulmonary syndrome. to obtain greater evolutionary insight into hantaviruses in the americas, a total of 211 rodents were captured in the mexican states of guerrero and morelos in 2006. anti-hantavirus antibodies were detected in 27 of 211 serum samples (12.8%) by elisa. the distribution of seropositive rodents was: 17 peromyscus beatae, 1 megadontomys thomasi, 1 neotoma picta, 6 reit ...201122138671
mating system is correlated with immunogenetic diversity in sympatric species of peromyscine mice.the number of reproductive partners per individual varies markedly across animal mating systems. this variation may be an important determinant of patterns of immunogenetic diversity, particularly at major histocompatibility complex (mhc) class i and ii loci. to compare immunogenetic variation in taxa with markedly different mating systems, we used rnaseq-generated data to quantify genotypic diversity in three species of peromyscine rodents: the monogamous california mouse (peromyscus californic ...202032701975
muleshoe virus and other hantaviruses associated with neotomine or sigmodontine rodents in texas.the broad objective of this study was to increase our knowledge of muleshoe virus and other hantaviruses associated with cricetid rodents in texas. anti-hantavirus antibody was found in 38 (3.2%) of 1171 neotomine rodents and 6 (1.8%) of 332 sigmodontine rodents from 10 texas counties; hantaviral rna was detected in 23 (71.9%) of 32 antibody-positive rodents. analyses of nucleocapsid protein gene sequences indicated muleshoe virus infection in four hispid cotton rats (sigmodon hispidus) from nor ...201728714801
reservoir competence of four chaparral-dwelling rodents for borrelia burgdorferi in california.aspects of the reservoir competence of four rodents for the lyme disease spirochete, borrelia burgdorferi, were evaluated in california. rodents were live-trapped and ear-punch biopsies were cultured during each season. a second set of biopsies was cultured from representative individuals after 2-3 weeks of captivity and the results of culturing biopsies taken on both dates were compared with the results of feeding ixodes pacificus larvae on hosts xenodiagnostically. the prevalence of infections ...19968651378
element content in tissues of four rodent species sampled in the geysers geothermal steamfield.liver and kidney tissue samples from four rodent species collected in the geysers geothermal steamfield of northern california were analyzed for content of 28 elements. element concentrations in samples from the developed region of the geysers were compared with samples from undeveloped reference regions to determine the influence of geothermal power development on element content in small mammal tissues. eight elements (b, ca, cu, mg, mn, p, sr, ti) were enriched in samples from the geysers, 12 ...198915092429
searching for a new home: decision making by dispersing brush mice.natal dispersal occurs when young animals leave the area where they were born and reared and search the surrounding landscape for a new place to settle. despite the importance of dispersal for both individuals and populations, search behavior by dispersers, including the decision-making process of choosing a place to settle, has not been investigated in the field. here we draw on the mate search literature, in which the theory of decision making during search has been well developed, and ask whe ...200818837674
survey for evidence of colorado tick fever virus outside of the known endemic area in california.a virus very similar or identical to colorado tick fever (ctf) virus was recovered from the blood clot of one of 104 black-tailed jack rabbits (lepus californicus) examined during a survey for various zoonotic agents in mammals and ticks from the university of california, hopland field station, mendocino county, california, 1974--79. this is the first reported isolation of a ctf-like virus from l. californicus, and only the second time such a virus has been found in northwestern california. mend ...19827102919
some corrections in haemogregarine (apicomplexa: protozoa) nomenclature.the nomenclature of three genera in the family haemogregarinidae (haemogregarina, karyolysus, and hepatozoon) has been reviewed and the following new names are introduced to replace homonyms or for previously unnamed species: haemogregarina carlosi n. nom., in the erythrocytes of the lizard lacerta ocellata; haemogregarina tincae n. nom., in the stomach and intestine of the tench tinca tinca; hepatozoon insectivorae n. sp., in the leucocytes of the shrews sorex araneus and crocidura leucodon; he ...19826757414
chromosomal variation in certain populations of peromyscus boylii and its systematic implications. 19724654237
standardized karyotype of deer mice, peromyscus (rodentia). the committee for standardization of chromosomes of peromyscus.a standard g-band karyotype is proposed for the genus peromyscus. g-banded chromosomes of peromyscus boylii glasselli (nf=56), numbered and arranged according to euchromatic lengths, serve as the standard. it is suggested that rearrangements of the standard pattern which occur in other species of peromyscus be described using the general methods of the paris conference (1971).1977891259
evolutionary implications of chromosomal polymorphisms in peromyscus boylii from southwestern mexico. 198628556328
molecular phylogenetics of the peromyscus boylii species group (rodentia: muridae) based on mitochondrial cytochrome b sequences.variation in the mitochondrial cytochrome b gene (1143 bp) was examined to estimate the phylogenetic relationships of taxa within the peromyscus boylii species group. in addition, phylogenetic relationships among the aztecus, boylii, and truei species groups were addressed. maximum-likelihood, neighbor-joining, and maximum-parsimony (weighted and equally weighted) analyses produced similar topologies with p. boylii, p. beatae, p. simulus, p. stephani, p. madrensis, p. levipes, and three undescri ...200010991790
dispersing brush mice prefer habitat like home.during natal dispersal, young animals leave their natal area and search for a new area to live. in species in which individuals inhabit different types of habitat, experience with a natal habitat may increase the probability that a disperser will select the same type of habitat post-dispersal (natal habitat preference induction or nhpi). despite considerable interest in the ecological and the evolutionary implications of nhpi, we lack empirical evidence that it occurs in nature. here we show tha ...200818077253
brush mouse (peromyscus boylii) population dynamics and hantavirus infection during a warm, drought period in southern arizona.we monitored limestone canyon hantavirus (lscv) antibody prevalence, host (brush mouse, peromyscus boylii) abundance, and environmental variables (temperature and rainfall) in brush mice captured on three trapping webs in southern arizona for 5 yr. although seasonal patterns were subtle, we observed large multiyear variation in population abundance and antibody prevalence. limestone canyon hantavirus infection in brush mouse populations varied over time with prevalence ranging from 0% to 33%. at ...200717984263
ultrastructure of the pineal gland of the brush mouse (peromyscus boylei): influence of long and short photoperiod.the ultrastructure of the pineal gland of wild-captured brush mice (peromyscus boylei) was examined. a homogeneous population of pinealocytes was present in the pineal gland of this species. the golgi apparatus, granular endoplasmic reticulum, mitochondria, lysosomes, dense-core vesicles, vacuoles containing fluocculent material, clear vesicles, microtubules and glycogen particles were consistent components of the pinealocyte cytoplasm; infrequently-observed organelles included centrioles, "syna ...19836875535
long-term hantavirus persistence in rodent populations in central arizona.for 35 months, we monitored hantavirus activity in rodent populations in central arizona. the most frequently captured hantavirus antibody-positive rodents were peromyscus boylii and p. truei. antibody-positive p. boylii were more frequently male (84%), older, and heavier, and they survived longer on trapping web sites than antibody-negative mice. the number of antibody-positive p. boylii was greater during high population densities than during low densities, while antibody prevalence was greate ...199910081677
botfly parasitism in the brush mouse and white-footed mouse in the ozarks. 196514275230
temporal and geographic evidence for evolution of sin nombre virus using molecular analyses of viral rna from colorado, new mexico and montana.all viruses in the family bunyaviridae possess a tripartite genome, consisting of a small, a medium, and a large rna segment. bunyaviruses therefore possess considerable evolutionary potential, attributable to both intramolecular changes and to genome segment reassortment. hantaviruses (family bunyaviridae, genus hantavirus) are known to cause human hemorrhagic fever with renal syndrome or hantavirus pulmonary syndrome. the primary reservoir host of sin nombre virus is the deer mouse (peromyscus ...200919602267
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