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comparison of the effects of ethane-1-hydroxy-1,1-diphosphonate and dichloromethylene diphosphonate upon periodontal bone resorption in rice rats (oryzomys palustris). 1979161500
periodontitis. animal model: periodontitis in the rice rat (oryzomys palustris). 1979474713
biology of the rice rat (oryzomys palustris natator) in a laboratory environment. ix. preweaning growth of the skull.the pattern of skull growth of the rice rat (oryzomys palustris natator) over the pre-weaning period of development reveals a characteristic triphasic outline which stems, in part, from the interplay of the external environment and the genetic endowment. within the triphasic spectrum the neural skull growth exhibits an accelerated rate of growth during the early phases which eventually reverses to a rapid deceleration in the final phase. in contrast, the facial skull growth shows increased growt ...19761274681
borrelia burgdorferi in ticks (acari: ixodidae) from coastal virginia.ixodid ticks removed from hosts and from vegetation during march-november 1987 at sites in coastal virginia and north carolina were examined for borrelia burgdorferi. b. burgdorferi was evident in nine (22%) ixodes cookei packard removed from rice rats (oryzomys palustris), a white-footed mouse (peromyscus leucopus), and raccoons (procyon lotor); four (6%) amblyomma americanum (l.) removed from raccoons; and two (3%) dermacentor variabilis (say) removed from a raccoon and a rice rat. b. burgdorf ...19911941936
the spiny rat louse, polyplax spinulosa, as a parasite of the rice rat, oryzomys palustris, in north america.the spiny rat louse, polyplax spinulosa, was collected, as adults and embryonated ova from the rice rat, oryzomys palustris, a cricetid rodent, in davidson co., tennessee. this sucking louse is typically parasitic on domestic rats, which are murid rodents. because most sucking lice are normally host specific, such cross-familial host infestation is noteworthy.19883047354
periodontopathic micro-organisms in the rice rat (oryzomys palustris).the rice rat spontaneously develops periodontal disease, and this process can be accelerated if the animal is placed on a high sucrose diet. as the aetiological agent(s) is unknown, this study was undertaken to determine the micro-organisms associated with bone loss. animals at weaning were placed on either a high sucrose diet or on regular rat chow and were sampled periodically for a variety of micro-organisms. bacteroides spp., spirochetes, and actinobacillus actinomycetemcomitans were not iso ...19883060702
biology of the rice rat (oryzomys palustris natato) in a laboratory environment. viii. postweaning body growth. 19744446882
seasonal incidence of porocephalus crotali (pentastomida) in rice rats, oryzomys palustris, from a florida salt marsh. 19744828345
biology of the rice rat (oryzomys palustris natator) in a laboratory environment. iv. mineralisation of the molar teeth. 19744829361
biology of the rice rat (oryzomys palustris natator) in a laboratory environment. v. the maxillary and mandibular osteodental fissures. 19744841860
biology of the rice rat (oryzomys palustris natator) in a laboratory environment. 3. morphology of dentition. 19744850779
eimeria palustris sp. n. and isospora hammondi sp. n. (coccidia: eimeriidae) from the marsh rice rat, oryzomys palustris (harlan). 19715003273
lyperosomum intermedium sp. n. (digenea: dicrocoeliidae) from the rice rat, oryzomys palustris, from southeastern salt marshes. 19725022855
angiostrongylus schmidti sp. n. (nematoda: metastrongyloidea) from the rice rat, oryzomys palustris, in florida, with a key to the species of angiostrongylus kamensky, 1905. 19715104560
eimeria kinsellai sp. n. (protozoa: eimeriidae) in a marsh rice rat oryzomys palustris from florida. 19715167229
reservoir competence of the rice rat (rodentia: cricetidae) for borrelia burgdorferi.the reservoir competence of the rice rat, oryzomys palustris, for borrelia burgdorferi is described. infected ixodes scapularis say (i. dammini, spielman, clifford, piesman & corwin) nymphs were used to infect animals. borrelia infection was diagnosed by xenodiagnostic feeding of noninfected i. scapularis larvae and by reisolation of the spirochetes from blood and other tissues. rice rats acquired b. burgdorferi and maintained spirochete infection for 5-9 wk. b. burgdorferi were cultured from sa ...19957608919
effects of prenatal and postnatal photoperiods and of the pineal gland on early testicular development in the marsh rice rat (oryzomys palustris).prepubertal male rice rats are responsive reproductively to photoperiod early in postnatal development. testicular growth was inhibited in animals gestated and reared to 28 days of age on photoperiods ranging from 8 to 13 h of light per day, and stimulated in animals reared on 14 h or more of light per day, suggesting a critical photoperiod between 13 and 14 h for testicular growth. in addition, postnatal photoperiod markedly affected testicular development in animals exposed to various prenatal ...19957626725
effect of photoperiod on gonadal maintenance and development in the marsh rice rat (oryzomys palustris).reproductive responsiveness to photoperiod was examined in adult and prepubertal rice rats. in experiment 1, adult males on 16l:8d and 14l:10d maintained testicular size, while exposure to 12l:12d and 10l:14d resulted in testicular regression, followed by spontaneous testicular recrudescence. adult females (experiment 2) on long photoperiods had larger uterine and ovarian weights at most times examined and maintained vaginal patency compared to females on short photoperiods. reproductive develop ...19938282176
four new gymnophallid digeneans from rice rats, willets, and molluscs in florida.gymnophalloides heardi n. sp. differs from gymnophalloides tokiensis fujita, 1925 and gymnophalloides seoi lee et al., 1993 in the smaller body size, presence of a single, lobed vitellarium, and elongate seminal vesicle. in contrast with other gymnophallid digeneans that utilize avian and bivalve hosts, g. heardi is the first species to be reported from a rodent oryzomys palustris (harlan); its second intermediate host is a pulmonate gastropod, melampus bidentatus (l.). three gymnophallid specie ...19958544066
isolation, genetic diversity, and geographic distribution of bayou virus (bunyaviridae: hantavirus).bayou hantavirus, previously implicated in human hantavirus pulmonary syndrome in louisiana, was isolated from a rice rat (oryzomys palustris) captured in georgia. the presence of antibody among rice rats captured throughout the southeastern united states and the extent of diversity among the genetic variants of bayou viruses suggest that the rice rat is the most likely natural reservoir of the virus and that both virus and host have probably co-evolved for some years.19979347961
bayou virus-associated hantavirus pulmonary syndrome in eastern texas: identification of the rice rat, oryzomys palustris, as reservoir host.we describe the third known case of hantavirus pulmonary syndrome (hps) due to bayou virus, from jefferson county, texas. by using molecular epidemiologic methods, we show that rice rats (oryzomys palustris) are frequently infected with bayou virus and that viral rna sequences from hps patients are similar to those from nearby rice rats. bayou virus is associated with o. palustris; this rodent appears to be its predominant reservoir host.19989452404
lack of seroreactivity to ehrlichia chaffeensis among rodent populations.a retrospective serosurvey for antibodies to ehrlichia chaffeensis was conducted on eight species of wild rodents (mus musculus, oryzomys palustris, peromyscus leucopus, rattus norvegicus, reithrodontomys humulis, sciurus carolinensis, sciurus niger, and sigmodon hispidus) from the southeastern united states. serum samples (n = 281) collected between 1973 and 1993 were evaluated using an indirect fluorescent antibody test. all samples, screened at a dilution of 1:32, were negative for antibodies ...19989577793
ticks and antibodies to borrelia burgdorferi from mammals at cape hatteras, nc and assateague island, md and va.results of a survey for ixodid ticks and/or serum antibodies to borrelia burgdorferi from 14 species of small to large mammals from eastern coastal areas of the united states are presented. most samples were obtained from july 1987 through june 1989 (excluding december-march) at 3 locales: assateague is. national seashore, worcester co., md., and accomack co., va. (approximately 38 degrees 05' n 75 degrees 10' w), and cape hatteras national seashore, dare co., nc (approximately 35 degrees 30' n ...199910534951
characterization of lyme disease spirochetes isolated from ticks and vertebrates in north carolina.borrelia burgdorferi isolates obtained from numerous locations and from different hosts in north carolina, were compared to previously characterized strains of the lyme disease spirochete and other borrelia spp. the spirochete isolates were confirmed to be b. burgdorferi sensu stricto based on immunofluorescence (ifa) using a monoclonal antibody to outer surface protein a (osp a [h5332]) and polymerase chain reaction (pcr) using a species-specific nested primer for a conserved region of the gene ...200010682743
polymorphic microsatellite loci of oryzomys palustris, the marsh rice rat, in south florida detected by silver staining. 200011091336
host utilization and seasonal occurrence of dermacentor species (acari:ixodidae) in missouri, usa.a total of 3,235 dermacentor variabilis (say) specimens were collected from birds, mammals, and by dragging vegetation, and 2,683 d. albipictus (packard) ticks were collected from deer from 1993 to 1996. peak seasonal occurrence of adult d. variabilis was from may through july with a precipitous decrease in august. nymphal d. variabilis populations peaked in june. peak activity of larvae was bimodal, with one activity peak during late summer (september) and a second peak in winter or early sprin ...200011201355
effects of age and photoperiod on reproduction and the spleen in the marsh rice rat (oryzomys palustris).to examine the interactions between age and photoperiod on reproduction and spleen weights, we exposed adult male and female rice rats of various ages to photoperiods of 16:8-h light-dark photoperiods (16l:8d) or 12l:12d. after 10 wk, animals were killed and the following data were recorded: weights of testes, seminal vesicles, uterus, ovaries, body, and spleen and, in addition, vaginal patency. young adult males displayed a greater degree of testicular and seminal vesicle regression in short ph ...200111247851
host associations of ticks parasitizing rodents at borrelia burgdorferi enzootic sites in south carolina.a total of 237 rodents was collected in 4 regions of south carolina from july 1994 through december 1995. eight species were collected, including cotton mouse, hispid cotton rat, eastern woodrat, marsh rice rat, white-footed mouse, eastern harvest mouse, golden mouse, and black rat. of the 1,514 ticks recovered from these hosts, ixodes minor neumann, including larvae, nymphs, and adults, was the most abundant species, representing 54% of the total. only immature stages of other tick species were ...200111780825
the swamp rice rat (oryzomys palustris natator) as a possible laboratory animal for special purposes. 195114908050
susceptibility of rice rats (oryzomys palustris) to schistosoma mansoni. 195214928158
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 ...200516354810
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 ...200920836801
some laelapine mites (acari: laelapidae) ectoparasitic on small mammals in the galapagos islands, including a new species of gigantolaelaps from aegialomys galapagoensis.abstract abstract: a collection of laelapine mites from small mammals in the galapagos islands is identified and their host distributions reviewed. two species of native rodents, aegialomys galapagoensis and nesoryzomys narboroughii, were infested only with laelapine species typical of neotropical oryzomyine rodents; rattus rattus was infested with laelaps nuttalli, a host-specific ectoparasite endemic to old world rattus. a synopsis of gigantolaelaps fonseca is provided and we describe a new la ...201121506821
socio-ecology of the marsh rice rat (oryzomys palustris) and the spatio-temporal distribution of bayou virus in coastal texas.along the southeastern coast of the united states of america (usa), the marsh rice rat (oryzomys palustris) is the primary host for the hantavirus, genotype bayou. according to the socio-ecological model for a territorial, polygamous species, females should be distributed across space and time by habitat resources and predation risks, whereas males should space themselves according to the degree of female aggregation and reproductive synchrony. to investigate how females affect the male-male tra ...201323733291
stable transmission of borrelia burgdorferi sensu stricto on the outer banks of north carolina.the spirochaete (borrelia burgdorferi) associated with lyme disease was detected in questing ticks and rodents during a period of 18 years, 1991-2009, at five locations on the outer banks of north carolina. the black-legged tick (ixodes scapularis) was collected at varied intervals between 1991 and 2009 and examined for b. burgdorferi. the white-footed mouse (peromyscus leucopus), house mouse (mus musculus) marsh rice rat (oryzomys palustris), marsh rabbit (sylvilagus palustris), eastern cottont ...201627966833
bioavailability and trophic transfer of sediment-bound ni and u in a southeastern wetland system.elemental composition of soil, herbaceous and woody plant species, and the muscle and liver tissue of two common small mammal species were determined in a wetland ecosystem contaminated with ni and u from nuclear target processing activities at the savannah river site, aiken, sc. species studied were black willow ( salix nigra l.), rushes ( juncus effusus l.), marsh rice rat ( oryzomys palustris), and cotton rat ( sigmodon hispidus). two mature trees were sampled around the perimeter of the form ...200312434216
pineal gland and melatonin affect testicular status in the adult marsh rice rat (oryzomys palustris).the effects of the presence or absence of the pineal gland and of melatonin administration were examined on testicular maintenance, regression, and recrudescence in adult male rice rats. pinealectomy at the beginning of the study caused significant testicular regression in animals housed on both long (16l:8d) and short (12l:12d) photoperiods (experiment 1). sham-operated males maintained testicular weight on 16l:8d and underwent testicular regression on 12l:12d. the magnitude of testicular regre ...19958536938
photoperiod and melatonin affect testicular growth in the marsh rice rat (oryzomys palustris).reproduction in rice rats is subject to photoperiodic control and the pineal gland mediates this effect. we examined the effects of the pineal gland hormone melatonin on testicular weight when administered via implants, injections, and infusions. testicular weight was modified by photoperiod and the size of the melatonin implant. twenty-millimeter implants suppressed testicular weight in rice rats housed on 12- and 16-hr photoperiods, while those housed on a 14-hr photoperiod were more sensitive ...19947869231
enhanced alveolar bone loss in a model of non-invasive periodontitis in rice rats.the rice rat (oryzomys palustris) develops periodontitis-like lesions when fed a diet rich in sucrose and casein (h-sc). we aimed to establish whether this model can accurately mimic the development of human periodontitis.201222233442
effects of photoperiod on pineal melatonin in the marsh rice rat (oryzomys palustris).pineal melatonin content was examined under four different photoperiods (10l:14d, 12l:12d, 14l:10d, and 16l:8d) in adult female rice rats (experiment 1). pineal melatonin was basal during the light and increased beginning 1 hr after lights off. within 2 hr after lights off, melatonin increased to levels that were maintained throughout the dark period. in all but one photoperiod (10l:14d), melatonin remained elevated prior to light onset and decreased markedly within one hour after lights on. in ...19957562372
food ecology of the rice rat, oryzomys palustris (harlan), in a georgia salt marsh. 19676063703
biology of the rice rat (oryzomys palustris natator) in a laboratory environment. vii. pre-weaning growth of the body.body growth using weight and length parameters have been examined following the introduction of the rice rat to laboratory conditions and a history of breeding covering some 15 generations. the pattern of growth shows a characteristic enphasic form which appears to be determined by the interplay of the external environment and the genetic endowment. the external environmental factors include the waxing and waning of the lactational performance of the mother and the intake of solid food, resultin ...19751154992
biology of the rice rat (oryzomys palustris natator) in a laborabory environment. x. postweaning growth of the skull.a survey of skull development of the rice rat (oryzomys palustris natator) covering a period of 21 days to 16 months involving equal numbers of males and females (108) was undertaken using various skull parameters. sexual dimorphism in relation to body weight and length emerged before that of the skull which was only clearly marked by 2 months. a number of the skull parameters by virtue of their individual growth potential did not show sexual differences in size for a long time, whereas others w ...19761032076
enzyme histochemistry of periodontal pathogenesis in the rice rat (oryzomys palustris). 1979159129
cutaneous epitheliotropic t-cell lymphoma in a marsh rice rat (oryzomys palustris).published reports of spontaneous neoplasia in marsh rice rats (oryzomys palustris) are sparse. we report here a case of cutaneous epitheliotropic t-cell lymphoma in a 14-mo-old marsh rice rat that involved the ear pinnae, with dissemination to the liver and spleen. histologically, the thickened ear pinnae showed diffuse infiltration of neoplastic lymphocytes into the epidermis, dermis, and adnexal skin structures, with pautrier microaggregations present in the epidermis. in addition, neoplastic ...201526473345
prevalence of food impaction-induced periodontitis in conventionally housed marsh rice rats (oryzomys palustris).marsh rice rats (oryzomys palustris) fed a pelleted diet high in sucrose and casein have been used as a model for moderate to severe periodontitis. here we characterize the prevalence, location, and histopathologic features of food-impaction lesions (fil), a unique type of oral event, in rice rats fed standard pelleted rodent chow from weaning until 34 wk of age. healthy female rats (n = 90; age, 4 wk) were weaned into groups (n = 10 to 24) and were euthanized at 4, 16, 22, 28, or 34 wk of age. ...201728222838
zoledronic acid increases the prevalence of medication-related osteonecrosis of the jaw in a dose dependent manner in rice rats (oryzomys palustris) with localized periodontitis.investigate role of dose/duration of zoledronic acid (zol), a powerful anti-resorptive (par), on prevalence of medication-related osteonecrosis of the jaw (mronj) in rice rats (oryzomys palustris), a species with natural susceptibility to food impaction-induced localized periodontitis (filp). we hypothesize that zol induces mronj lesions in rice rats with filp, and that the prevalence of mronj rises with increasing dose and duration of zol treatment.201729289789
breeding, husbandry, veterinary care, and hematology of marsh rice rats (oryzomys palustris), a small animal model for periodontitis.rice rats (oryzomys palustris) are a recognized animal model for studying periodontal disease and the photoperiodic regulation of reproduction. here we share information regarding the breeding, husbandry, veterinary care, and hematologic findings about this animal species to facilitate its use in studies at other research institutions. rice rats initially were quarantined and monitored for excluded pathogens by using microbiologic, parasitologic, and serologic methods with adult female mus muscu ...201525651091
seasonal variation of north american form of gigantolaelaps mattogrossensis (acari: laelapidae) on marsh rice rat in southern coastal texas.the ectoparasites of a small mammal community within an intertidal zone in the upper gulf coast region of texas were studied to assess the seasonal variation in abundances of the mite gigantolaelaps mattogrossensis (fonseca) (acari: laelapidae) on the marsh rice rat, oryzomys palustris (harlan). further study into the ecology and dynamics of this parasite-host relationship was deemed to be necessary to expand the understanding of these potential participants in the ecology of bayou hantavirus, a ...200717294924
food availability and photoperiod affect reproductive development and maintenance in the marsh rice rat (oryzomys palustris).to examine whether photoperiod and food availability interact to influence reproductive development (experiment 1), we exposed juvenile male and female rice rats to 16l:8d or 14l:10d and to ad lib, 80% of ad lib, or 60% of ad lib food intake from 3 to 8 weeks of age and recorded body and reproductive organ masses. absolute paired testis masses were similar in ad lib and 80% of ad lib groups but significantly different than the 60% of ad lib group in both photoperiods. relative paired testis mass ...200312536009
melatonin, but not auxin, affects postnatal reproductive development in the marsh rice rat (oryzomys palustris).melatonin and the plant hormone auxin (indole-3-acetic acid) have some structural similarity and, may thus exert comparable physiological effects on reproduction and growth. to test this possibility, i examined the effects of melatonin and auxin administration on reproductive and non-reproductive organ development in an animal model, the marsh rice rat oryzomys palustris. juvenile males housed under 14l:10d conditions were injected daily for four weeks with saline, melatonin, auxin, or melatonin ...201323721467
geographical distribution of rodent-associated hantaviruses in texas.the purpose of this study was to increase our knowledge of the geographic distribution and natural host range of hantaviruses in texas, southeastern new mexico, and mexico. blood samples from 3,225 wild rodents, representing 34 species, were tested for hantavirus antibody (igg), using an enzyme-linked immunosorbent assay. hantavirus antibody was found in one or more rodents from each of 13 counties in texas, otero county in southeastern new mexico, and mexico state (central mexico). the 133 anti ...200111469186
a survey of hantavirus antibody in small-mammal populations in selected united states national parks.hantavirus activity in 39 national parks in the eastern and central united states was surveyed by testing 1,815 small mammals of 38 species for antibody reactive to sin nombre virus. antibody-positive rodents were found throughout the area sampled, and in most biotic communities. antibody was detected in 7% of 647 deer mice (peromyscus maniculatus), 2% of 590 white-footed mice (p. leucopus), 17% of 12 rice rats (oryzomys palustris), 3% of 31 cotton rats (sigmodon hispidus), and 33% of 18 western ...19989574803
oncologic doses of zoledronic acid induce osteonecrosis of the jaw-like lesions in rice rats (oryzomys palustris) with periodontitis.though osteonecrosis of the jaw (onj) is temporally-associated with the use of nitrogen-containing bisphosphonates (n-bps), a cause-and-effect relationship has not yet been established. we hypothesize that onj is a two-stage process in which: (1) risk factors initiate pathologic processes in the oral cavity that lead to a supranormal rate of hard tissue necrosis; and (2) powerful antiresorptives reduce the rate of removal of necrotic bone sufficiently to allow its net accumulation in the jaw. to ...201222623376
x chromosome inactivation and xist evolution in a rodent lacking line-1 activity.dosage compensation in eutherian mammals occurs by inactivation of one x chromosome in females. silencing of that x chromosome is initiated by xist, a large non-coding rna, whose coating of the chromosome extends in cis from the x inactivation center. line-1 (l1) retrotransposons have been implicated as possible players for propagation of the xist signal, but it has remained unclear whether they are essential components. we previously identified a group of south american rodents in which l1 retr ...200919603076
enzootic of bayou hantavirus in rice rats (oryzomys palustris) in 1983. 19957658901
mystr: an endogenous retrovirus family in mammals that is undergoing recent amplifications to unprecedented copy numbers.a large percentage of the repetitive elements in mammalian genomes are retroelements, which have been moved primarily by line-1 retrotransposons and endogenous retroviruses. although line-1 elements have remained active throughout the mammalian radiation, specific groups of endogenous retroviruses generally remain active for comparatively shorter periods of time. identification of an unusual extinction of line-1 activity in a group of south american rodents has opened a window for examination of ...200516282470
kyphosis in the marsh rice rat (oryzomys palustris). 19873546741
a review of gongylonema spp. (nematoda: gongylonematidae) in north american rodents with description of a new species from the cotton rat, sigmodon hispidus (mammalia: cricetidae).gongylonema archboldi n. sp. (nematoda: gongylonematidae) is described from tunnels in the gastric mucosa of the stomach of the cotton rat (sigmodon hispidus) from highlands county, florida, u.s.a. measurements are also given for specimens from cotton mice (peromyscus gossypinus), oldfield mice (peromyscus polionotus), florida mice (podomys floridanus), and golden mice (ochrotomys nuttalli) from the same locality. additional specimens were collected from the cotton rat and the rice rat (oryzomys ...201627394819
[litomosoides, parasites of rodents; taxonomic consequences].a redescription of the type specimens of the three following species is given: l carinii (travassos, 1919) from sciurus sp. in brazil. l, sigmodontis chandler, 1931 from sigmodon hispidus and l. scotti forrester et kinsella. 1977 from oryzomys palustris in north america. a description of two brazilian species is also given: l. galizai n. sp. from (ecomys trinitatus tapajinus and l. kohnae n. sp. from nectomys squamipes. the conclusions are: the type species of the genus litomosoides: l. sigmodon ...20102817694
effects of photoperiod, melatonin, and the pineal gland on compensatory gonadal hypertrophy during postnatal development in the marsh rice rat (oryzomys palustris).the roles of photoperiod, melatonin, and the pineal gland in regulating the magnitude of compensatory gonadal hypertrophy (cgh) and other reproductive and non-reproductive organ growth during post-weaning development were examined in the marsh rice rat oryzomys palustris. juvenile rice rats of both sexes were left gonadally intact (control group) or unilaterally castrated (ulc) and housed on 12l:12d, 14l:10d, or 16l:8d. within a photoperiod (14l:10d and 16l:8d, but not 12l:12d), growth of the re ...200516082165
[contribution to the study of microphallidae travassos, 1920 (trematoda). xlvi. description of floridatrema heardi n. gen., n. sp., parasite of oryzomys palustris (mammalia) of the united states].the authors describe the adult of the trematode floridatrema heardi n. gen, n. sp., parasite of the intestine of oryzomys palustris (mammalia:rodentia) in florida (usa). the new genus is placed among the microphallidae, maritrematidi, maritrematinae, maritrematini; near the genus maritrema nicoll, it is characterised by vitellaria in the form of a horseshoe and the anterior extension of two symmetrical uterine loops as far as the level of the pharynx, the left anterior uterine loop proceeding fr ...19949235193
prevalence of antibodies to arenaviruses in rodents from the southern and western united states: evidence for an arenavirus associated with the genus neotoma.the objectives of this study were to extend our knowledge of the geographic distribution and rodent host range of arenaviruses in north america. sera from wild rodents collected from the southern and western united states were tested for antibody against tamiami, pichinde, junin, and lymphocytic choriomeningitis viruses, using an indirect fluorescent antibody test. antibody to at least one arenavirus was found in 220 (3.1%) of 7,106 rodents tested. the antibody-positive animals included mus musc ...19968686773
the effect of stannous and sodium fluoride on coronal caries, root caries and bone loss in rice rats.sixty rice rats (oryzomys palustris) were divided by littermate into 3 groups of 20 each. the 3 groups received either snf2 (1000 parts/10(6) f), naf (1000 parts/10(6] or double-distilled water (control). test solutions were topically applied to molar teeth, twice daily, for 7 days. all rats were also provided with double-distilled drinking water and diet 2000 ad libitum. experiments ended after 9 weeks. alveolar bone loss, root and coronal caries were recorded and scored. snf2 significantly red ...19902202279
catacamas virus, a hantaviral species naturally associated with oryzomys couesi (coues' oryzomys) in honduras.the primary objective of this study was to extend our knowledge of the geographical distribution, genetic diversity, and natural host associations of the hantaviruses indigenous to north america. antibody to a hantavirus was found in 5 (20.8%) of 24 coues' oryzomys (oryzomys couesi) and none of 41 other rodents captured near the town of catacamas in eastern honduras, and a hantavirus was isolated from one of the antibody-positive coues' oryzomys. analyses of nucleotide and amino acid sequence da ...200617124003
anti-vascular endothelial growth factor antibody monotherapy causes destructive advanced periodontitis in rice rats (oryzomys palustris).angiogenesis inhibitors (agi) are commonly used in combination chemotherapy protocols to treat cancer, and have been linked to osteonecrosis of the jaw (onj). however, it is unknown if agi therapy alone is sufficient to induce onj. we have previously established an onj model in rice rats with localized periodontitis that receive zoledronic acid (zol). the purpose of this study was to use this model to determine the role of anti-vascular endothelial growth factor a (anti-vegf) antibody treatment ...202031707108
attenuated amiloride-sensitive current and augmented calcium-activated chloride current in marsh rice rat (oryzomys palustris) airways.prolonged heat and sea salt aerosols pose a challenge for the mammalian airway, placing the protective airway surface liquid (asl) at risk for desiccation. thus, mammals inhabiting salt marshes might have acquired adaptations for asl regulation. we studied the airways of the rice rat, a rodent that inhabits salt marshes. we discovered negligible na+ transport through the epithelial sodium channel (enac). in contrast, carbachol induced a large cl- secretory current that was blocked by the calcium ...201931491720
comparison of isoflurane, ketamine-dexmedetomidine, and ketamine-xylazine for general anesthesia during oral procedures in rice rats (oryzomys palustris).rice rats (oryzomys palustris) are an unconventional laboratory species that has been used to study photoperiodicity, periodontitis, and osteonecrosis of the jaw. interventional procedures that require anesthesia, including oral procedures, are sometimes necessary in preclinical settings. the use of anesthetics including isoflurane and ketamine combined with α2-adrenoreceptor agonists, such as dexmedetomidine and xylazine, is well-established for laboratory rodents. however, their effects have b ...201930572978
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