Publications

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chagas's disease in the amazon basin: 1. trypanosoma cruzi infections in silvatic mammals, triatomine bugs and man in the state of pará, north brazil.a total of 1,197 wild animals from pará state north brazil, were examined for haematozoa. trypanosoma cruzi-like parasites were found in 13 different species, and were particularly common in a variety of marsupials (didelphidae), porcupines (coendou spp.), armadillos (dasypus novemcinctus) and coatimundis(nasua nasua). three human infections are reported, making a total of seven autochthonous cases of chagas's disease from pará since the first were described in 1969. a serological survey of 5,31 ...1979112730
[studies on wild reservoirs and vectors of trypanosoma cruzi. xxix. natural infection of nasua nasua solitaria schinz 1821 by t. cruzi]. 19685709122
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 ...19836418015
the coati (nasua nasua, carnivora, procyonidae) as a reservoir host for the main lineages of trypanosoma cruzi in the pantanal region, brazil.we have focused on the role played by a carnivore, the coati (nasua nasua), in the transmission cycle of trypanosoma cruzi in the brazilian pantanal biome. we collected data during 2000/01 and 2005-07. prevalence and pattern of t. cruzi infection were determined by serological tests and hemoculture. isolates were characterized by miniexon molecular assay. our results demonstrate that t. cruzi transmission cycle among coatis in the southern pantanal seems to be well established, as we found high ...200818541281
modulating variables of trypanosoma cruzi and trypanosoma evansi transmission in free-ranging coati (nasua nasua) from the brazilian pantanal region.abstract this is a long-term follow-up of infection by trypanosoma cruzi (tc) and trypanosoma evansi (te) in the free-ranging coatis (procyonidae: nasua nasua) from pantanal region (mato grosso do sul, brazil). we evaluated tc and te infection by immunofluorescence assay, hemoculture (hc), and microhematocrit centrifuge techniques (mhct). we also examined coatis health by quantifying hematological parameters including packed cell volume (pcv), white blood cell (wbc) count, and differential leuko ...201021142963
food web connections and the transmission cycles of trypanosoma cruzi and trypanosoma evansi (kinetoplastida, trypanosomatidae) in the pantanal region, brazil.we examined by parasitological tests (hemocultures and buffy coat) infection by trypanosoma cruzi and t. evansi in blood samples from leopardus pardalis, cerdocyon thous and domestic dogs. besides, 25 t. cruzi isolates previously derived from feral pigs and small wild mammals were here characterized by miniexon gene and demonstrated to be in the tci genotype. herein, we make an overall analysis of the transmission cycle of both trypanosome species in the light of the assemblage of data collected ...201121600622
complexity and multi-factoriality of trypanosoma cruzi sylvatic cycle in coatis, nasua nasua (procyonidae), and triatomine bugs in the brazilian pantanal.trypanosoma cruzi is dispersed in nature through many transmission mechanisms among a high diversity of vectors and mammalian species, representing particular behaviors and habitats. thus, each locality has a unique set of conditions underlying the maintenance of this parasite in the wild. the aim of the present study was to evaluate the life-cycle of t. cruzi in free-ranging coatis from the central region of the brazilian pantanal using a multi-factorial approach.201627370106
co-infection and wild animal health: effects of trypanosomatids and gastrointestinal parasites on coatis of the brazilian pantanal.wild animals are infected by diverse parasites, but how they influence host health is poorly understood. we examined the relationship of trypanosomatids and gastrointestinal parasites with health of wild brown-nosed coatis (nasua nasua) from the brazilian pantanal. we used coati body condition and hematological parameters as response variables in linear models that were compared using an information theoretic approach. predictors were high/low parasitemias by trypanosoma cruzi and t. evansi, and ...201526657699
infestation of arboreal nests of coatis by triatomine species, vectors of trypanosoma cruzi, in a large neotropical wetland.the coati (nasua nasua, carnivora) is a medium-sized mammal common in the pantanal of brazil. unlike most mammals, coatis construct arboreal nests used for resting and reproduction. in this region, the coati is an important host of trypanosoma cruzi, the causative agent of chagas disease. there are two possible routes through coatis can be infected by t. cruzi: the oral route or the vectorial route. however, the relative importance of each of these routes in the infection of coatis and its role ...201526611974
the multiple and complex and changeable scenarios of the trypanosoma cruzi transmission cycle in the sylvatic environment.in this study, we report and discuss the results generated from over 20 years of studies of the trypanosoma cruzi sylvatic transmission cycle. our results have uncovered new aspects and reviewed old concepts on issues including reservoirs, true generalist species, association of mammalian species with distinct discrete typing units - dtus, distribution of t. cruzi genotypes in the wild, mixed infections, and t. cruzi transmission ecology. using parasitological and serological tests, we examined ...201526200785
trypanosoma cruzi infection in neotropical wild carnivores (mammalia: carnivora): at the top of the t. cruzi transmission chain.little is known on the role played by neotropical wild carnivores in the trypanosoma cruzi transmission cycles. we investigated t. cruzi infection in wild carnivores from three sites in brazil through parasitological and serological tests. the seven carnivore species examined were infected by t. cruzi, but high parasitemias detectable by hemoculture were found only in two procyonidae species. genotyping by mini-exon gene, pcr-rflp (1f8/akw21i) and kdna genomic targets revealed that the raccoon ( ...201323861767
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