| trypanosoma cruzi in the sylvatic environment: distinct transmission cycles involving two sympatric marsupials. | thirty-five specimens of philander frenata and 36 didelphis marsupialis were captured in the same atlantic forest area of brazil between 1992 and 1994. haemocultures showed that 50% of p. frenata and 60% of d. marsupialis were infected with trypansoma cruzi. biological, biochemical and molecular characterization of the isolates suggested 2 distinct transmission cycles of t. cruzi occurred between these 2 sympatric didelphids. the t. cruzi isolates could be distinguished according to their associ ... | 2000 | 11132378 |
| trypanosoma cruzi in marsupial didelphids (philander frenata and didelhis marsupialis): differences in the humoral immune response in natural and experimental infections. | philander frenata and didelphis marsupialis harbor parasitism by trypanosoma cruzi without developing any apparent disease and on the contrary to d. marsupialis, p. frenata maintains parasitism by t. cruzi ii subpopulations. here we compared the humoral immune response of the two didelphids naturally and experimentally infected with t. cruzi ii group, employing sds-page/western blot techniques and by an indirect immunofluorescence assay. we also studied the histopathological pattern of naturally ... | 2003 | 12806461 |
| small mammal populations of an agroecosystem in the atlantic forest domain, southeastern brazil. | this study reports 2 years of the population dynamics and reproduction of a small mammal community using the removal method. the study was conducted in a rural area of the atlantic forest, in sumidouro, rio de janeiro state, brazil. the population sizes, age structure and reproduction were studied for the four most common species in the study area. the overall diversity was 1.67 and ranged between 0.8 to 1.67. the species richness was 13 considering the whole study. the most abundant species wer ... | 2007 | 17505767 |
| siphonaptera of small rodents and marsupials in the pedra branca state park, state of rio de janeiro, brazil. | in an region of atlantic rainforest corresponding to the geopolitical area of the pedra branca state park, rio de janeiro, southeastern brazil, 160 small mammals were captured, of which 64 rodents and 96 marsupials from october 2005 to october 2007. there were collected in these hosts six flea species from three families (ctenophthalmidae, rhopalopsyllidae and pulicidae), totalizing 162 specimens. adoratopsylla (tritopsylla) intermedia intermedia was the most common species found, followed by po ... | 2010 | 20385060 |
| spermatogenesis in a neotropical marsupial species, philander frenatus (olfers, 1818). | despite the singular morphology of the male genital system and the different reproductive strategies of marsupials, little emphasis has been given to the testis morphology and spermatogenic kinetics in this mammalian order. the present study aimed to investigate the testis function and the duration of spermatogenesis in the southeastern four-eyed opossum, philander frenatus. testes of six adult males were routinely processed for histological and stereological analyses. in order to determine the ... | 2017 | 28732668 |
| breeding of philander frenata (didelphimorphia, didelphidae) in captivity. | data on the reproductive biology and laboratory management of philander frenata are presented here. sensory contact before pairing increased breeding success and reduced aggression between pairs. gestation period was 13-14 days, with a post-lactation oestrous. births occurred only between august and february. mean litter size at birth and at weaning was 5.5 (sd = 2.4) and 4.0 (sd = 1.9), respectively. sex ratio at birth was statistically biased toward males. the timing of weaning was established ... | 1998 | 9807757 |