| detection of leishmania (viannia) braziliensis complex in wild mammals from colombian coffee plantations by pcr and dna hybridization. | the small mammal fauna of coffee plantations in sw colombia was surveyed to determine which of the species present were infected with parasites of the leishmania (viannia) braziliensis complex and might therefore act as reservoirs of human cutaneous leishmaniasis. fifty animals of seven different species were captured. tissue samples were taken from the ears of specimens from each of the seven species. thirty three samples were analysed by polymerase chain reaction (pcr) using oligonucleotide pr ... | 1998 | 9588240 |
| (t2ag3)n telomeric sequence hybridization suggestive of centric fusion in karyotype marsupials evolution. | it has been suggested that the karyotype of the marsupials derived from a low diploid number (2n = 14) which originated, through fissions of biarmed chromosomes, the karyotypes with a higher 2n. the telomeric sequence (t2ag3)n was in situ hybridized to the chromosomes of gracilinanus microtarsus and g. emiliae, micoureus demerarae and marmosa murina, species with 2n = 14, in monodelphis sp., m. domestica, m. kunsi and m. brevicaudata with 2n = 18, and in lutreolina crassicaudata, didelphis albiv ... | 2000 | 11294606 |
| karyotype composition of some rodents and marsupials from chapada diamantina (bahia, brasil). | the chapada diamantina (cd) is located in bahia state, between 11-14 degrees s and 41-43 degrees w, being part of the serra do espinhaço. the occurrence of different habitats and transition areas permits an interesting mammal fauna composition, with species from different biomes living in sympatry. species of didelphimorphia and rodentia are important members of mammal communities in almost all different habitats, and morphological and cytogenetic characters are important for a correct identific ... | 2007 | 18094834 |
| permanent genetic resources: characterization of eight microsatellite loci in the woolly mouse opossum, micoureus paraguayanus, isolated from micoureus demerarae. | eight novel microsatellite markers were isolated from the woolly mouse opossum from the amazon forest in peru, micoureus demerarae, using a partial genomic dna library and an enrichment protocol. these loci were polymorphic in m. demerarae and micoureus paraguayanus populations from the atlantic forest in brazil with the number of alleles ranging from two to 23. those eight loci plus another five already described for m. paraguayanus will allow for the evaluation of genetic diversity of populati ... | 2008 | 21585787 |
| seroprevalence of toxoplasma gondii in wild marsupials and rodents from the atlantic forest of pernambuco state, northeastern region, brazil. | felids are important in the epidemiology of toxoplasma gondii because they are the only hosts that can excrete the environmentally resistant oocysts in their feces. cats acquire t. gondii infection in nature by ingesting tissues of small mammals and birds. serum samples of 223 feral marsupials and 174 feral rodents captured in 7 segments of the atlantic forest of the state of pernambuco, northeastern region of brazil, and in urban areas of the municipality of recife were examined for antibodies ... | 2013 | 23829204 |
| the araguaia river as an important biogeographical divide for didelphid marsupials in central brazil. | the riverine barrier model suggests that rivers play a significant role in separating widespread organisms into isolated populations. in this study, we used a comparative approach to investigate the phylogeography of 6 didelphid marsupial species in central brazil. specifically, we evaluate the role of the mid-araguaia river in differentiating populations and estimate divergence time among lineages to assess the timing of differentiation of these species, using mitochondrial dna sequence data. t ... | 2015 | 26249652 |
| coccidial dispersion across new world marsupials: klossiella tejerai scorza, torrealba & dagert, 1957 (apicomplexa: adeleorina) from the brazilian common opossum didelphis aurita (wied-neuwied) (mammalia: didelphimorphia). | klossiella tejerai scorza, torrealba & dagert, 1957 is a primitive coccidian parasite reported from the new world marsupials didelphis marsupialis (linnaeus) and marmosa demerarae (thomas). the current work describes k. tejerai from the brazilian common opossum didelphis aurita (wied-neuwied) in southeastern brazil, evidencing the coccidial dispersion across opossums of the same family. the sporocysts recovered from urine samples were ellipsoidal, 20.4 × 12.7 µm, with sporocyst residuum composed ... | 2014 | 25079818 |
| functional-adaptive anatomy of the forelimb in the didelphidae, and the paleobiology of the paleocene marsupials mayulestes ferox and pucadelphys andinus. | an attempt to determine the locomotor activities of mayulestes ferox (borhyaenoidea) and pucadelphys andinus (didelphoidea) from the early paleocene site of tiupampa (bolivia) is presented. the functional anatomy of the forelimbs of these south american marsupials is compared to that of some living didelphids: caluromys philander, micoureus demerarae, marmosa murina, didelphis marsupialis, monodelphis brevicaudata and metachirus nudicaudatus. deductions from bone morphology to myology and locomo ... | 2001 | 11124686 |
| the relationships of marsupial-dwelling viannaiidae and description of travassostrongylus scheibelorum sp. n. (trichostrongylina: heligmosomoidea) from mouse opossums (didelphidae) from french guiana. | the trichostrongylid nematode travassostrongylus scheibelorum sp. n. from the linnaeus' mouse opossum, marmosa murina (linnaeus) (type host), and the woolly mouse opossum, marmosa demerarae (thomas), from french guiana is described. the nematodes have a synlophe with ridges frontally oriented from right to left, six dorsal and six ventral, at midbody; seven dorsal and seven ventral posterior to the vulva, and two cuticular thickenings within the lateral spaces; a long dorsal ray and a pointed cu ... | 2014 | 25065130 |
| novel anaplasma and ehrlichia organisms infecting the wildlife of two regions of the brazilian amazon. | during 2009-2012, wild animals were sampled in the amazon biome of brazil. animal tissues and blood were tested by polymerase chain reaction (pcr) assays targeting dna of the bacterial family anaplasmataceae (genera anaplasma, ehrlichia, wolbachia) and the genus borrelia. overall, 181 wild animals comprising 36 different species (2 reptiles, 5 birds, and 29 mammals) were sampled. all birds and reptiles were negative by all pcr assays, as well as all mammals for the borrelia pcr assay. anaplasmat ... | 2017 | 28690147 |
| highly conserved d-loop sequences in woolly mouse opossums marmosa (micoureus). | this study reports the occurrence of highly conserved d-loop sequences in the mitochondrial genome of the woolly mouse opossum genus marmosa subgenus micoureus (mammalia, didelphimorphia, didelphidae). sixty-six sequences of marmosa (micoureus) demerarae, marmosa (micoureus) constantiae, and marmosa (micoureus) paraguayanus were amplified using universal d-loop primers and virtually no genetic differences were detected within and among species. these sequences matched the control region of the m ... | 2012 | 22409752 |
| x chromosomes of american marsupials contain minimal amounts of euchromatin. | the karyotypes of four south american didelphid marsupials, representing diploid numbers of 2n = 14 and 18, have been analyzed by a variety of banding techniques. the 2n = 14 karyotypes display a high degree of homoeology, but there also exist distinct similarities between the 2n = 14 and 2n = 18 karyotypes. the interspecific differences found are due to centric fissions, pericentric inversions, and variations in the amount and composition of the constitutive heterochromatin. contrary to the evo ... | 2002 | 12900581 |
| intraspecific variation in the distribution of the interstitial telomeric (ttaggg)n sequences in micoureus demerarae (marsupialia: didelphidae). | the distribution of the telomeric sequence (ttaggg)n was studied in chromosomes of micoureus demerarae (2n = 14), a south american marsupial, by fluorescence in-situ hybridization (fish). the telomeric repeat sequence was present at both ends of all chromosomes, but also various interstitial telomeric sequences (its) were detected in the pericentromeric heterochromatic regions. intraspecific differences in the number of its (2 to 8) were observed without intraindividual variation. the presence o ... | 2000 | 11117354 |
| eimeria spp. (apicomplexa: eimeriidae) of marsupials (mammalia: didelphimorphia) in southern bahia, brazil. | the occurrence of eimeria schneider, 1875 in mammals of the order didelphimorphia indicates the infection-predisposition of these animals, which in turn is mainly determined for their eating habits. the objective of this work was to evaluate the parasitism of eimeria spp. in marsupials of the atlantic forest of the southern region of bahia. fecal samples were collected from marsupials captured in the regions of ilhéus, una, belmonte and mascote, with traps of the sherman model (23 × 8 × 9 cm), t ... | 2019 | 30427519 |