| vertebrate hosts and vectors of trypanosoma rangeli in the amazon basin of brazil. | a total of 46 trypanosoma rangeli stocks were isolated from naturally infected mammals and triatomine vectors. twenty-two stocks were from the common opossum (didelphis marsupialis), one from the brown "4-eyed" opossum (metachirus nudicaudatus), one from the anteater (tamandua tetradactyla), one from the coati (nasua nasua), seven from rhodnius pictipes and 14 from rhodnius robustus. two stocks were also isolated from recently fed sandflies (lutzomyia sp., shannoni group). the stocks were identi ... | 1983 | 6418015 |
| leishmaniasis in brazil: xvi. isolation and identification of leishmania species from sandflies, wild mammals and man in north para state, with particular reference to l. braziliensis guyanensis causative agent of "pian-bois". | a total of 125 wild mammals (14 different species) were examined for evidence of infection with leishmania in an area of primary forest highly endemic for "pian-bois", due to leishmania braziliensis guyanensis, in north pará state, brazil. parasites isolated were characterized biologically, and biochemically on enzymic profiles. l. b. guyanensis was isolated from the viscera of one lesser anteater (tamandua tetradactyla) and one opossum (didelphis marsupialis), and the skin of one rodent (proech ... | 1981 | 7324128 |
| the opossum, didelphis marsupialis (marsupialia: didelphidae), as a reservoir host of leishmania braziliensis guyanensis in the amazon basin of brazil. | a total of 52 opossums (six species) were examined for evidence of infection with leishmania in three different areas of forest near manaus, amazonas state, brazil. no infections were detected in 27 opossums from a region of relatively undisturbed forest, including specimens of didelphis marsupialis (18); metachirus nudicaudatus (four); monodelphis brevicaudata (one); marmosa cinerea (two); m. murina (one) and m. parvidens (one). of 15 d. marsupialis captured from a biological reserve, much dist ... | 1981 | 7324129 |
| dynamics of leishmania chagasi infection in small mammals of the undisturbed and degraded tropical dry forests of northern colombia. | the infection rate with leishmania chagasi and the population dynamics of small mammals were studied in an undisturbed forest reserve (colosó) and an area of highly degraded forest (san andrés de sotavento [sas]) in northern colombia, both endemic for visceral leishmaniasis. live trapping of mammals was done every month, and species, age, sex and reproductive status determined. l. chagasi was detected in samples of skin or spleen by the polymerase chain reaction, after extraction of deoxyribonuc ... | 1998 | 9861395 |
| mapping the distribution of the interstitial telomeric (ttaggg)n sequences in eight species of brazilian marsupials (didelphidae) by fish and the correlation with constitutive heterochromatin. do its represent evidence for fusion events in american marsupials? | the c-band pattern and the distribution of the (ttaggg)(n) sequence after fluorescence in situ hybridization (fish), were studied in eight species of didelphidae marsupials: four species with 2n = 14 (marmosops parvidens, marmosops incanus, marmosa murina and metachirus nudicaudatus), two species with 2n = 18 (monodelphis domestica and m. americana), and two with 2n = 22 (didelphis marsupialis and lutreolina crassicaudata). the hybridization signals were observed at both termini telomeres of all ... | 2002 | 12826754 |
| studies on cyclic passage of yellow fever virus in south american mammals and mosquitoes; marsupials (metachirus nudicaudatus and marmosa) in combination with aedes aegypti as vector. | | 1948 | 18898700 |
| 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 |
| new species and records of mites of the superfamily sarcoptoidea (acariformes: psoroptidia) from mammals in brazil. | sixteen species of the superfamily sarcoptoidea (acariformes: psoroptidia) belonging to 10 genera of the families atopomelidae, listrophoridae, chirodiscidae, and listropsoralgidae are recorded in brazil. among them, three species, prolistrophorus hylaeamys sp. nov. from hylaeamys laticeps (lund, 1840) (cricetidae: sigmodontinae) from minas gerais, lynxacarus serrafreirei sp. nov. from galictis cuja (molina, 1782) (carnivora: mustelidae) from rio de janeiro (listrophoridae), and didelphoecius mi ... | 2016 | 26751869 |
| a comparative study of lymph node mast cell populations in five marsupial species. | in order to determine whether different subpopulations of mast cells exist, mast cells of mandibular and axillary lymph nodes from five species (didelphis aurita, metachirus nudicaudatus, philander opossum, marmosops incanus and gracilinanus agilis) of south american marsupials were studied. our results showed that mast cells present in the connective tissue of the capsule and septa (ctmc) were similar to those described for eutherian mammals. however, a population of mast cells that was present ... | 1999 | 10481303 |
| 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 |
| revision of the family listropsoralgidae fain, 1965 (acariformes: sarcoptoidea)-skin parasites of marsupials and rodents. | the family listropsoralgidae fain, 1965 (acariformes: sarcoptoidea) is represented by the permanent skin ectoparasites associated with the south american and australian marsupials (12 species) and the south american rodents of the family echimyidae (1 species). the phylogenetic relationships of these mites (12 ingroup and 2 outgroup species) are reconstructed on the basis of the maximum parsimony (mp) and bayesian analyses (ba) of 76 morphological characters. mp analysis confirmed monophyly of t ... | 2013 | 24699778 |
| oxygen consumption and thermoregulatory responses in three species of south american marsupials. | oxygen consumption (vo(2)), body temperature (t(b)) and wet thermal conductance (c(wet)), under resting conditions, exposure to low ambient temperature (t(a)) and during sustained exercise (treadmill running) were measured in three phylogenetic related (same family; didelphidae) south american marsupials possessing similar body masses: caluromys philander (arboreal/fruit and insect eating), philander opossum (terrestrial and arboreal/omnivore), and metachirus nudicaudatus (terrestrial/omnivore). ... | 2007 | 17020814 |
| gigantorhynchus ortizi n. sp., an acanthocephalan from metachirus nudicaudatus. | | 1954 | 13192545 |
| high trypanosoma spp. diversity is maintained by bats and triatomines in espírito santo state, brazil. | the aim of this study was to reevaluate the ecology of an area in the atlantic forest, southeast brazil, where chagas disease (cd) has been found to occur. in a previous study, immediately after the occurrence of a cd case, we did not observe any sylvatic small mammals or dogs with trypanosoma cruzi cruzi infections, but triatoma vitticeps presented high t. c. cruzi infection rates. in this study, we investigated bats together with non-volant mammals, dogs, and triatomines to explore other possi ... | 2017 | 29176770 |
| diet overlap and spatial segregation between two neotropical marsupials revealed by multiple analytical approaches. | species co-existence depends on how organisms utilize their environment and resources. when two sympatric species are similar in some ecological requirements, their coexistence may arise from differences in resource use over time and/or space. interactions among coexisting marsupials remain poorly understood, especially in the neotropics. here we combine spatial niche measurements, individual-resource networks, and isotopic niche approaches, to investigate the ecological strategies used by the n ... | 2017 | 28704561 |
| a morphological and ultrastructural study of the paracloacal (scent) glands of the marsupial metachirus nudicaudatus geoffroy, 1803. | morphological and ultrastructural features of the paracloacal glands of metachirus nudicaudatus are described. two pairs of glands, one on the right and the other on the left of the anal canal, are formed, each consisting of a major and a minor portion. their wall is made up of three layers: a mucosal, a muscular and an external capsule. the inner one is a mucosa the epithelium of which contains holocrine cells characterized by lipid droplets and intermediate filaments. the surrounding vascular ... | 1995 | 8560957 |
| taxonomy of physaloptera mirandai (nematoda: physalopteroidea) based in three-dimensional microscopy and phylogenetic positioning. | gastrointestinal nematodes are important ecological assets for the maintenance of the biodiversity in the atlantic forest in brazil. they parasitize a number of animals of the local fauna, in which some species can promote serious injuries in the stomach wall of their hosts, which may lead to death. among these nematodes, parasites of the genus physaloptera are known to parasitize mammals (particularly carnivores and small rodents), birds and reptiles, being important for the local biodiversity. ... | 2019 | 31039334 |