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whole-genome sequencing reveals genetic variation in the asian house rat.whole-genome sequencing of wild-derived rat species can provide novel genomic resources, which may help decipher the genetics underlying complex phenotypes. as a notorious pest, reservoir of human pathogens, and colonizer, the asian house rat, rattus tanezumi, is successfully adapted to its habitat. however, little is known regarding genetic variation in this species. in this study, we identified over 41,000,000 single-nucleotide polymorphisms, plus insertions and deletions, through whole-genome ...201627172215
detection of bartonella species in small mammals from zhejiang province, china.to estimate the prevalence of bartonella in small mammals of different species, during different seasons, and at different study sites, and to provide baseline data for the risk assessment of human bartonella infection, we captured small mammals using snap traps in zhejiang province, china. bartonella species were detected in small-mammal samples by polymerase chain reaction and positive amplicons were sequenced. bartonella dna was detected in 47% (90/192) of apodemus agrarius, 31% (14/45) of ra ...201020090031
chromosomal evolution in rattini (muridae, rodentia).the rattini (muridae, murinae) includes the biologically important model species rattus norvegicus (rno) and represents a group of rodents that are of clinical, agricultural and epidemiological importance. we present a comparative molecular cytogenetic investigation of ten rattini species representative of the genera maxomys, leopoldamys, niviventer, berylmys, bandicota and rattus using chromosome banding, cross-species painting (zoo-fluorescent in situ hybridization or fish) and bac-fish mappin ...201121850459
human-dominated habitats and helminth parasitism in southeast asian murids.the effect of habitat anthropization is investigated using a comparative analysis based on a literature survey of the gastrointestinal helminths of murid rodents described in southeast asia (sea). the literature survey gave 30 references on helminth diversity concerning 20 murid rodent species. the diversity of helminths was high with a total of 13 species of cestodes, 15 species of trematodes, 29 species of nematodes and one species of acanthocephalans. the highest helminth species richness was ...201020593196
an overview of the host spectrum and distribution of calodium hepaticum (syn. capillaria hepatica): part 1-muroidea.calodium hepaticum (syn. capillaria hepatica) is a worldwide-distributed species of zoonotic nematodes with a high affinity to the liver. several rodent species of the superfamily muroidea serve as main hosts for this pathogen. c. hepaticum has been found in muroidean hosts in more than 60 countries in europe; north, central, and south america; asia; africa; and oceania. c. hepaticum was documented in more than 90 muroidean rodent species (murinae, deomyinae, arvicolinae, neotominae, cricetinae, ...201424248632
molecular typing of leptospira interrogans strains isolated from rattus tanezumi in guizhou province, southwest of china.to identify and type three leptospires isolated from rattus tanezumi in guizhou province by using three molecular techniques (pfge, mlva, and mlst), reveal the molecular characteristic of causative agents of local leptospirosis and evaluate these three molecular methods based on their detection resolution and efficiency.201223122311
genetic monitoring detects an overlooked cryptic species and reveals the diversity and distribution of three invasive rattus congeners in south africa.south africa's long and extensive trade activity has ensured ample opportunities for exotic species introduction. whereas the rich biodiversity of endemic southern african fauna has been the focus of many studies, invasive vertebrates are generally overlooked despite potential impacts on biodiversity, health and agriculture. genetic monitoring of commensal rodents in south africa which uncovered the presence of rattus tanezumi, a south-east asian endemic not previously known to occur in africa, ...201121324204
molecular characterization of two hantavirus strains from different rattus species in singapore.hantaviruses cause human disease in endemic regions around the world. outbreaks of hantaviral diseases have been associated with changes in rodent population density and adaptation to human settlements leading to their proliferation in close proximity to human dwellings. in a parallel study initiated to determine the prevalence of pathogens in singapore's wild rodent population, 1206 rodents were trapped and screened. the findings established a hantavirus seroprevalence of 34%. this paper descri ...201020096099
cryptosporidium spp. in wild, laboratory, and pet rodents in china: prevalence and molecular characterization.to understand the prevalence of cryptosporidium infection in rodents in china and to assess the potential role of rodents as a source for human cryptosporidiosis, 723 specimens from 18 rodent species were collected from four provinces of china and examined between august 2007 and december 2008 by microscopy after using sheather's sugar flotation and modified acid-fast staining. cryptosporidium oocysts were detected in 83 specimens, with an overall prevalence of 11.5%. phodopus sungorus, phodopus ...200919820152
phylogenetic analysis of bartonella detected in rodent fleas in yunnan, china.previous studies have demonstrated a diversity of bartonella spp. in rodent populations in yunnan province, china. although bartonella spp. have been isolated from cat fleas and cattle ticks collected from their animal hosts, little is known about bartonella carried by rodent fleas. in this study, bartonella dna was detected by polymerase chain reaction (pcr) in two of five species of rodent fleas. these included xenopsylla cheopis and ctenophthalmus lushuiensis, which were collected from rattus ...200717984255
[the molecular epidemiologic investigation of hantavirus carried by rodent hosts in wenzhou, zhejiang province].to study the epidemiological features of hantavirus in rodents in wenzhou, zhejiang province.200819173853
evidence that rodents are a reservoir of hepatitis e virus for humans in nepal.hepatitis e virus (hev) is an important cause of enterically transmitted hepatitis in developing countries. sporadic autochthonous cases of hepatitis e have been reported recently in the united states and other industrialized countries. the source of hev infection in these cases is unknown; zoonotic transmission has been suggested. antibodies to hev have been detected in many animals in areas where hev is endemic and in domestic swine and rats in the united states. there is evidence supporting h ...200212454141
a newly recognized hantavirus in the asian house rat (rattus tanezumi) in indonesia.hantaviral sequences were recovered from the lung tissue of an asian house rat (rattus tanezumi) captured in serang, indonesia. phylogenetic analysis of partial l, m and s segment sequences showed that they belonged to a novel hantavirus provisionally named serang virus (serv). notably, serv is distinct from the hantaviruses associated with rodents of the species rattus: seoul virus associated with rattus norvegicus worldwide and gou virus isolated from rattus rattus in china. instead serv appea ...200919088290
abundance and distribution of xenopsylla cheopis on small mammals collected in west java, indonesia during rodent-borne disease surveys.during february 2004 and september 2005, xenopsylla cheopis were collected from small mammal hosts during rodent-bone disease surveys in jakarta and bandung, indonesia. during 4 trap nights in jakarta, 4 rodent species (rattus exulans, rattus norvegicus, rattus tanezumi and mus musculus) and one shrew species (suncus murinus) were collected. rattus tanezumi had the highest x. cheopis load (128 x. cheopis from 84 r. tanezumi) but r. norvegicus had the highest flea index, 1.8. in bandung, over 6 t ...200617333735
the flea genus sigmactenus (siphonaptera: leptopsyllidae): a new species from timor and new material from new guinea and the philippines.both sexes of sigmactenus timorensis n. sp. are described from rattus tanezumi and rattus exulans collected in west timor, indonesia. the true host presumably is a native murine rat such as the extant, endemic rattus timorensis or 1 of several extinct, endemic timorese rats. analyses of new collections of sigmactenus cavifrons and sigmactenus toxopeusi from new guinea demonstrate that these fleas show considerable morphological variation. we propose that they represent a single species with the ...200010864236
variation of c-bands in the chromosomes of several subspecies of rattus rattus.all subspecies of black rats (rattus rattus) used in the present study are characterized by having large and clear c-bands at the centromeric region. the appearance of the bands, however, is different in the subspecies. chromosome pair no. 1 in asian type black rats (2n=42), which are characterized by an acrocentric and subtelocentric polymorphism, showed c-band polymorphism. in phillipine rats (r. rattus mindanensis) the pair was subtelocentric with c-bands, but in malayan black rats (r. rattus ...19751149576
seasonal periodicity of ectoparasites of rattus rattus tanezumi temminck from taiwan. 19705451048
[study on the prevalence of bartonella species in rodent hosts from different environmental areas in yunnan].to investigate bartonella infections in small mammalian reservoir hosts from different environments and types of climate in yunnan.200415769319
is the oriental house rat (rattus tanezumi) a potential reservoir for trypanosoma evansi in thailand?trypanosoma evansi is a protozoan blood parasite and etiologic agent of "surra," a disease affecting a wide range of domestic and wild mammals, some identified as potential reservoirs. although t. evansi has been detected in several small wild rodent species, their role in the epidemiology of surra is unclear. there is molecular evidence of t. evansi in wild rodents in asia, but it is not known whether they can carry the parasite for sufficient time to significantly contribute to the epidemiolog ...201525932666
molecular demonstration of trypanosoma evansi and trypanosoma lewisi dna in wild rodents from cambodia, lao pdr and thailand.in this study, we investigated the molecular evidence of trypanosoma evansi in wild rodents from cambodia, lao pdr and thailand. between november 2007 and june 2009, 1664 rodents were trapped at eight sites representative of various ecological habitats. of those animals, 94 were tested by direct microscopic blood examination, 633 using the card agglutination test for trypanosomes (catt/t. evansi) and 145 by polymerase chain reaction (pcr) with two sets of primers: tryp1 (amplifying its1 of ribos ...201322321449
molecular prevalence of trypanosoma spp. in wild rodents of southeast asia: influence of human settlement habitat.this study investigated the molecular prevalence of trypanosoma lewisi and t. evansi in wild rodents from cambodia, lao pdr and thailand. between 2008 and 2012, rodents (and shrews) were trapped in nine locations and 616 of these were tested using three sets of primers: tryp1 (amplifying its1 of ribosomal dna of all trypanosomes), tbr (amplifying satellite genomic dna of trypanozoon parasites) and lew1 (amplifying its1 of ribosomal dna of t. lewisi). based on the size of the pcr products using t ...201424025128
[study on the integrated monitoring program regarding mouse and main mouse-borne disease in zhejiang province.]objective: to study the integrated monitoring program regarding mouse and plague, hemorrhagic fever of renal syndrome (hfrs) and leptospirosis. methods: integrated monitoring plan was used. a designated office coordinated 5 departments' actions within the zhejiang provincial center for disease control and prevention (cdc). cage-trapping method was conducted to monitor the density of mice from june to october, respectively. results: lishui municipal cdc had finished the integrated monitoring prog ...201121569735
genetic aspects of polymorphic c-bands in the chromosomes of the black rat (rattus rattus tanezumi) in japan. 1979535425
how important are rats as vectors of leptospirosis in the mekong delta of vietnam?leptospirosis is a zoonosis known to be endemic in the mekong delta of vietnam, even though clinical reports are uncommon. we investigated leptospira infection in rats purchased in food markets during the rainy season (october) (n=150), as well as those trapped during the dry season (february-march) (n=125) in the region using rt-pcr for the lipl32 gene, confirmed by 16s rrna, as well as by the microscopic agglutination test (mat). results were compared with the serovar distribution of human cas ...201525629781
[geographical distribution and host selection of leptotrombidium rubellum in some parts of yunnan province].to investigate the geographical distribution and host selection of leptotrombidium rubellum among different small mammal hosts in some areas of yunnan province, china.201323751471
gastrointestinal helminth fauna of rodents from cambodia: emphasizing the community ecology of host-parasite associations.extensive field surveys of rodents were conducted in cambodia from 2008 to 2014 to study the diversity and ecology of helminth infection in wild rodent populations. gastrointestinal helminths were isolated from 14 species of rodents (569 individuals) trapped from different habitats (forest, dry land, rain-fed land and human settlements) in four provinces of cambodia (krong preah sihanouk, mondolkiri, pursat and steung treng). the average prevalence of parasitic infection was 58.5% (range, 16.0-6 ...201627905270
dating of divergences within the rattus genus phylogeny using whole mitochondrial genomes.the timing and order of divergences within the genus rattus have, to date, been quite speculative. in order to address these important issues we sequenced six new whole mitochondrial genomes from wild-caught specimens from four species, rattus exulans, rattus praetor, rattus rattus and rattus tanezumi. the only rat whole mitochondrial genomes available previously were all from rattus norvegicus specimens. our phylogenetic and dating analyses place the deepest divergence within rattus at approxim ...200818725306
[two new species of stivalius (siphonaptera--pygiopsyllidae--pygiopsyllinae) from indonesia].the fleas, s. meridionalis n. sp. from timor and s. franciscae n. sp. from sulawesi, indonesia are described and illustrated. s. meridionalis was collected in central timor (timor tengah) at elevations between 930 m and 1,520 m, mainly from the murine rodent rattus tanezumi, although one specimen was recovered from a house shrew, suncus murinus. s. franciscae was collected in central sulawesi (sulawesi tengah) at known elevations between 950 m and 2,255 m from six species of native endemic murin ...200111474982
potentially zoonotic helminthiases of murid rodents from the indo-chinese peninsula: impact of habitat and the risk of human infection.in this study, we report the potential rodent-borne zoonotic helminths in wild-caught murid rodents from four categorized habitats-forest, nonflooded land, irrigated land, and human settlement in seven localities of thailand, cambodia, and lao pdr. out of 2478 rodent samples, 735 (29.7%) were infected by at least one of the following zoonotic helminth species: echinostoma malayanum, echinostoma ilocanum, plagiorchis muris, raillietina spp., hymenolepis diminuta, hymenolepis nana, cyclodontostomu ...201525629783
fragmented mitochondrial genomes of the rat lice, polyplax asiatica and polyplax spinulosa: intra-genus variation in fragmentation pattern and a possible link between the extent of fragmentation and the length of life cycle.blood-sucking lice (suborder anoplura) parasitize eutherian mammals with 67% of the 540 described species found on rodents. the five species of blood-sucking lice that infest humans and pigs have fragmented mitochondrial genomes and differ substantially in the extent of fragmentation. to understand whether, or not, any life-history factors are linked to such variation, we sequenced the mt genomes of polyplax asiatica and polyplax spinulosa, collected from the greater bandicoot rat, bandicota ind ...201424438034
[predictors for abundance of rattus tanezumi in households of commensal rodent plague foci].to explore the predictors on the abundance of rattus (r.) tanezumi in households of commensal rodent plague foci.201323751472
new inversion of the pair no. 3 chromosome in the black rat.a japanese black rat (rattus rattus tanezumi) with a subtelocentric pair no. 3 chromosome was found in gotenba, japan. by comparison of the length in both members of the chromosome pair, and from the g-band pattern, the subtelocentrics seemed to have developed from the original acrocentrics by the pericentric inversion.1977891800
helminth parasite species richness in rodents from southeast asia: role of host species and habitat.southeast asia is a biodiversity hotspot that harbours many species of rodents, including some that live in close contact with humans. they host helminth parasites, some of which are of zoonotic importance. it is therefore important to understand the factors that influence the richness of the helminths parasitizing rodents. the specific objectives of this study were to evaluate rodent species as a factor determining helminth richness in rodent assemblages, to identify the major rodent helminth r ...201425082015
invasion facilitates hybridization with introgression in the rattus rattus species complex.biological invasions result in novel species interactions, which can have significant evolutionary impacts on both native and invading taxa. one evolutionary concern with invasions is hybridization among lineages that were previously isolated, but make secondary contact in their invaded range(s). black rats, consisting of several morphologically very similar but genetically distinct taxa that collectively have invaded six continents, are arguably the most successful mammalian invaders on the pla ...201222607228
[investigation of chigger mites on small mammals in a flatland area of menghan, xishuangbanna, yunnan province].to investigate the species composition and distribution of chigger mites on small mammals in flatland area in menghan, xishuangbanna of yunnan province.201324812883
coumatetralyl resistance of rattus tanezumi infesting oil palm plantations in indonesia.rodent control is an important issue in human health and agriculture. oil palm plantations are rapidly expanding in indonesia and this is having a major economic and ecological impact. rodent control in oil palm plantations is based principally on the use of anti-vitamin k (avk), the main anticoagulant used being coumatetralyl, a first-generation avk. we conducted a comparative study in two well established oil palm plantations in indonesia: (1) one without chemical control in riau and (2) anoth ...201323264020
accumulation and biological effects of metals in wild rats in mining areas of zambia.the lead-zinc (pb-zn) mine in kabwe city and the copper-cobalt (cu-co) mine in the copperbelt province are major mining areas in zambia. to examine the effects of metal pollution on wildlife, wild black rats (rattus rattus and rattus tanezumi) were captured in kabwe and chingola (in the copperbelt province), and in lusaka (a noncontaminated site). wild black rats in kabwe accumulated significantly higher concentrations of pb and cd in various organs than rats from lusaka. in chingola, significan ...201323054276
the stadium effect: rodent damage patterns in rice fields explored using giving-up densities.rodents are globally important pre-harvest pests of rice. in southeast asia, rodent damage to growing rice crops is commonly concentrated towards the center of rice fields, away from the field edge, resulting in a clear pattern known as the "stadium effect." to further understand this behavior of rodent pests and to develop recommendations for future research and management, we examined the relation between giving-up densities (guds) and damage patterns. in tanay, luzon, philippines, gud trays c ...201727992109
[factors related to household rodent abundance in rodent-borne disease foci in western yunnan].to analyze the factors related to the household abundance of rodents in rodent-borne disease foci in the western part of yunnan province.201525907723
asian house rats may facilitate their invasive success through suppressing brown rats in chronic interaction.the asian house rat (rattus tanezumi) and the brown rat (rattus norvegicus) are closely related species and are partially sympatric in southern china. over the past 20 years, r. tanezumi has significantly expanded northward in china and partially replaced the native brown rat subspecies, r. n. humiliatus. although invasive species are often more aggressive than native species, we did not observe interspecific physical aggression between r. tanezumi and r. n. humiliatus. here, we focused on wheth ...201728413431
landscapes with different biodiversity influence distribution of small mammals and their ectoparasitic chigger mites: a comparative study from southwest china.from a previous field investigation in yunnan, southwest china between 2001 and 2015, we selected two types of landscapes to make a retrospectively comparative study on the distribution of small mammals and their ectoparasitic chigger mites. one landscape is "mountainous uncultivated land (mul)" with higher biodiversity, which is located in a famous "world nature heritage site", the three-parallel-rivers region in the northwest of yunnan. the other is "cultivated flatland landscape (cfl)" with l ...201829364908
breinlia (breinlia) jittapalapongi n. sp. (nematoda: filarioidea) from the asian house rat rattus tanezumi temminck in lao pdr.a new species of filarioid nematode of the genus breinlia yorke & maplestone, 1926 (nematoda: filarioidea) is described from rodents in lao pdr and according to its morphology, is placed in the subgenus breinlia. breinlia (breinlia) jittapalapongi n. sp. occurs in the asian house rat (rattus tanezumi temminck) and the sikkim rat (rattus andamanensis blyth) and is reported from two localities (luang prabang and champasak). the new species can be distinguished from all other congeners, which are m ...201525693458
detection and genetic characterization of diverse bartonella genotypes in the small mammals of singapore.bartonella species are arthropod-borne bacterial pathogens that infect numerous mammalian species. small mammals play an important role as natural reservoirs of many bartonella species, maintaining the greatest diversity of bartonella described to date. although bartonella research has been conducted in southeast asia, no studies have been undertaken on small mammals in singapore. here, we report the detection and description of bartonella in small mammals in singapore during the period of novem ...201829235263
establishment of a molecular tool for blood meal identification in malaysia.to establish a polymerase chain reaction (pcr) technique based on cytochrome b (cytb) gene of mitochondria dna (mtdna) for blood meal identification.201223569902
analysis of gamasid mites (acari: mesostigmata) associated with the asian house rat, rattus tanezumi (rodentia: muridae) in yunnan province, southwest china.during a survey lasting from 1990 to 2008, we captured 4,113 asian house rats, rattus tanezumi temminck 1844 (rodentia: muridae) from 28 counties of yunnan province in southwestern china. from these rats, a total of 19,304 gamasid mites (acari: mesostigmata) were collected and identified as comprising 50 different species. the species diversity of gamasid mites from this single rat species is higher than that reported previously from multiple hosts within a given geographical region. of the 50 m ...201323471780
can a native rodent species limit the invasive potential of a non-native rodent species in tropical agroforest habitats?little is known about native and non-native rodent species interactions in complex tropical agroecosystems. we hypothesised that the native non-pest rodent rattus everetti may be competitively dominant over the invasive pest rodent rattus tanezumi within agroforests. we tested this experimentally by using pulse removal for three consecutive months to reduce populations of r. everetti in agroforest habitat, and assessed over 6 months the response of r. tanezumi and other rodent species.201626271625
cytonuclear discordance among southeast asian black rats (rattus rattus complex).black rats are major invasive vertebrate pests with severe ecological, economic and health impacts. remarkably, their evolutionary history has received little attention, and there is no firm agreement on how many species should be recognized within the black rat complex. this species complex is native to india and southeast asia. according to current taxonomic classification, there are three taxa living in sympatry in several parts of thailand, cambodia and lao people's democratic republic, wher ...201323278980
bartonella species and trombiculid mites of rats from the mekong delta of vietnam.a survey of bartonella spp. from 275 rats purchased in food markets (n=150) and trapped in different ecosystems (rice field, forest, and animal farms) (n=125) was carried out during october, 2012-march, 2013, in the mekong delta of vietnam. the overall bartonella spp. prevalence detected by culture and pcr in blood was 14.9% (10.7-19.1%), the highest corresponding to rattus tanezumi (49.2%), followed by rattus norvegicus (20.7%). trapped rats were also investigated for the presence and type of c ...201525629779
new record of the scrub typhus vector, leptotrombidium rubellum, in southwest china.there are several main vectors of scrub typhus in china, and leptotrombidium rubellum wang et liao, 1984 is one of them, which was previously considered to be restricted to the coastal regions of changle to xiamen, fujian province of east china. ecological investigation of chigger mites in recent years demonstrated the presence of l. rubellum also in yunnan province. chigger mites were collected from 34 counties, in which 127,460 larval mites were collected from 14,381 small mammal hosts. a tota ...201728981880
habitat manipulation in lowland rice-coconut cropping systems of the philippines--an effective rodent pest management strategy?reduction of vegetation height is recommended as a management strategy for controlling rodent pests of rice in south-east asia, but there are limited field data to assess its effectiveness. the breeding biology of the main pest species of rodent in the philippines, rattus tanezumi, suggests that habitat manipulation in irrigated rice-coconut cropping systems may be an effective strategy to limit the quality and availability of their nesting habitat. the authors imposed a replicated manipulation ...201424038791
source tracking of human leptospirosis: serotyping and genotyping of leptospira isolated from rodents in the epidemic area of guizhou province, china.sustained human leptospirosis as well as death cases has been reported in qiandongnan prefecture, southeast of guizhou, china, recently, but these human patients were only clinically diagnosed, and leptospires have never been isolated from patients in these epidemic regions, in order to track the source of infection and understand the etiologic characteristic of leptospirosis, we performed rodent carrier surveillance for leptospirosis in the epidemic area in 2011. the population distribution of ...201323548108
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