| cross-transmission studies with eimeria arizonensis-like oocysts (apicomplexa) in new world rodents of the genera baiomys, neotoma, onychomys, peromyscus, and reithrodontomys (muridae). | cross-transmission experiments were performed using oocysts of an eimeria arizonensis-like coccidian from peromyscus leucopus and peromyscus truei, an e. arizonensis-like coccidian from reithrodontomys fulvescens, eimeria baiomysis and eimeria taylori from baiomys taylori, eimeria albigulae from neotoma albigula, and eimeria onychomysis from onychomys spp., between representatives of the above host genera. the e. arizonensis-like coccidian from r. fulvescens infected reithrodontomys megalotis, r ... | 1992 | 1597781 |
| induction of hepatic cyp1a activity as a biomarker for environmental exposure to aroclor 1254 in feral rodents. | specimens of the feral mouse species reithrodontomys fulvescens trapped from a polychlorinated biphenyl (pcb)-contaminated field location had hepatic ethoxyresorufin (etr) o-dealkylase activities and immunoreactive cyp1a protein contents which were two- to threefold higher than those measured in animals of the same species and sex collected from non pcb-contaminated reference sites. specimens with hepatic etr o-dealkylase activities differing by as little as 50% could readily be assigned as orig ... | 1992 | 1616319 |
| genome organization of repetitive elements in the rodent, peromyscus leucopus. | to document the frequency and distribution of repetitive elements in peromyscus leucopus, the white-footed mouse, a cosmid genomic library was examined. two thousand thirteen randomly chosen recombinants, with an average insert size of 35 kb and representing 2.35% of the haploid genome of p. leucopus, were screened with probes representing microsatellites, tandem repeats, and transposable elements. of the four dinucleotides, (gt)n was present in 87% of the clones, (ct)n was present in 59% of the ... | 1993 | 8395263 |
| experimental borrelia burgdorferi infections in the white-footed mouse, deer mouse, and fulvous harvest mouse detected by needle aspiration of spirochetes. | three methods were tested for recovering borrelia burgdorferi from live mice onto bsk ii culture medium. four laboratory-reared peromyscus leucopus were inoculated intraperitoneally with the jd-1 isolate of borrelia burgdorferi. borrelia burgdorferi spirochetes were recovered from 13 of 20 (65%) samples taken by needle aspiration between days 7 and 40 post-inoculation (pi) and from 1 of 16 samples of skin obtained by ear punch biopsy during the same sampling period. spirochetes were not recovere ... | 1993 | 8487370 |
| effects of field exposure to diazinon on small mammals inhabiting a semienclosed prairie grassland ecosystem. i. ecological and reproductive effects. | the widespread use of cholinesterase-inhibiting pesticides in the environment presents increasing concerns about their effects on human, wildlife, and ecosystem health. as a group, these pesticides are generally highly toxic and have great potential for negatively affecting nontarget organisms. small mammals have proven to be ideal biomonitors of environmental contaminants, and were used here to test for possible effects of a widely used cholinesterase-inhibiting insecticide, diazinon, in a natu ... | 2001 | 11351428 |
| a longitudinal study of bayou virus, hosts, and habitat. | what is currently known about the ecology of north american hantaviruses has come largely from studies on sin nombre virus (snv). we conducted a longitudinal study of bayou virus (bayv), the second-leading agent of hantavirus pulmonary syndrome in the united states. antibodies to hantavirus were detected from oryzomys palustris (most commonly infected species), sigmodon hispidus, peromyscus leucopus, reithrodontomys fulvescens, and baiomys taylori. however, only o. palustris had viral rna in tis ... | 2005 | 16354810 |
| small mammals as indicators of short-term and long-term disturbance in mixed prairie. | disturbance by military maneuvers over short and long time scales may have differential effects on grassland communities. we assessed small mammals as indicators of disturbance by military maneuvers in a mixed prairie in southern oklahoma usa. we examined sites on two soil series, foard and lawton, across a gradient of disturbance intensity. a manova showed that abundance of small mammals was associated (p = 0.03) with short-term (cover of vehicle tracks) disturbance but was not associated (p = ... | 2008 | 17458511 |
| protein nutrition of southern plains small mammals: immune response to variation in maternal and offspring dietary nitrogen. | maternal nutrition during pregnancy and postnatal offspring nutrition may influence offspring traits. we investigated the effects of maternal and postweaning offspring dietary nitrogen on immune function and hematology in two species of rodent: the hispid cotton rat (sigmodon hispidus), a primarily herbivorous rodent, and the fulvous harvest mouse (reithrodontomys fulvescens), an omnivore. these two species responded differently to the same levels of treatment, with cotton rats primarily influen ... | 2009 | 19199557 |
| bayou virus detected in non-oryzomyine rodent hosts: an assessment of habitat composition, reservoir community structure, and marsh rice rat social dynamics. | in the united states, bayou virus (bayv) ranks second only to sin nombre virus (snv) in terms of hantavirus pulmonary syndrome (hps) incidents, having been confirmed in cases from texas and louisiana since its discovery in 1994. this study on bayv infection among sympatric, non-oryzomyine rodents ("spillover") in freeport, tx, is the first to link patterns of hantavirus interspecific spillover with the spatiotemporal ecology of the primary host (marsh rice rat, oryzomys palustris). mark-recaptur ... | 2009 | 20836801 |
| 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 ... | 2017 | 28714801 |