| the complexity of the sylvatic cycle of trypanosoma cruzi in rio de janeiro state (brazil) revealed by the non-transcribed spacer of the mini-exon gene. | american trypanosamiasis occurs in nature as a sylvatic cycle, where trypanosoma cruzi interacts with wild triatomines and mammalian reservoirs, such as marsupials, rodents, armadillos and other animals. due to difficulties in trying to isolate t. cruzi stocks from the sylvatic cycle, very few studies have been performed in order to understand the parasite infection in natural environments. traditionally t. cruzi has been considered to be composed of a highly heterogeneous population of parasite ... | 1999 | 10028530 |
| the panorama of animal leptospirosis in rio de janeiro, brazil, regarding the seroepidemiology of the infection in tropical regions. | leptospirosis is an important disease caused by various serovars of leptospira sp. it can affect humans as well as domestic and wild animals; therefore, it has importance for public health, animal production, and wild species. the aim of this paper is to discuss the epidemiology of animal leptospirosis in rio de janeiro, brazil, as a possible model for other tropical regions. in several studies conducted in the last 20 years, a total of 47 rats, 120 dogs, 875 cows, 695 horses, 1,343 goats, 308 s ... | 2013 | 24289165 |
| census and distribution of the golden lion tamarin (leontopithecus rosalia). | during 1990-1992, a survey of the golden lion tamarin, leontopithecus rosalia, was carried out throughout its known distribution area. forest remnants were identified by visual interpretation of landsat-tm satellite images. localities occupied by l. rosalia were first identified by interviews with local people. all forests more than 20 ha in size, and for which two or more interviews suggested the presence of the species, were surveyed using "play-back" recordings of lion tamarin long calls. the ... | 2003 | 12526037 |
| helminths found in marmosets (callithrix penicillata and callithrixjacchus) introduced to the region of occurrence of golden lion tamarins (leontopithecusrosalia) in brazil. | the introduction of exotic species can increase the risk of extinction of native species through the introduction of new diseases, predation or resource competition. the marmosets callithrix penicillata and callithrix jacchus and hybrids of these two species have been introduced to privately owned forests in the lowland atlantic forest of the rio de janeiro state in brazil, the region of occurrence of the endangered golden lion tamarin, leontopithecus rosalia. because the ecology and biology of ... | 2010 | 20378249 |
| distinct patterns of trypanosoma cruzi infection in leontopithecus rosalia in distinct atlantic coastal rainforest fragments in rio de janeiro--brazil. | previous studies on infection of trypanosoma cruzi in the poço das antas biological reserve population of wild free-ranging leontopithecus rosalia have shown the presence of genotype t. cruzi ii, associated in brazil with human disease. herein, this study has been extended, the infection being evaluated in l. rosalia of 3 different tamarin populations, inhabiting distinct forest areas located in the same atlantic coastal rainforest. edentata, marsupialia, rodentia and chiroptera were examined ex ... | 2004 | 15648693 |
| trypanosoma cruzi infection in leontopithecus rosalia at the reserva biológica de poco das antas, rio de janeiro, brazil. | wild golden lion tamarins (leontopithecus rosalia) - endangered primates that are native to the brazilian atlantic coastal forest - were surveyed for the presence of trypanosoma cruzi with the use of giemsa-stained blood smears, hemocultures and an indirect immunofluorescence assay (ifat). positive ifat with titers ranging from 1:20 to 1:1280 were observed in 52% of the 118 wild tamarins examined and the parasite was isolated from 38 tamarins. no patent parasitemia was observed among the tamarin ... | 2000 | 10904398 |