Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/15570
Title: Trypanosoma cruzi TcI and TcII transmission among wild carnivores, small mammals and dogs in a conservation unit and surrounding areas, Brazil
Authors: Rocha, Fabiana Lopes
Roque, André Luiz Rodrigues
Arrais, Ricardo Corassa
Santos, Jean Pierre
Lima, Valdirene dos Santos
Xavier, Samanta Cristina das Chagas
Cordeir-Estrela, Pedro
D'Andrea, Paulo Sérgio
Jansen, Ana Maria
Affilliation: Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia de Tripanosomatídeos. Rio de Janeiro, RJ, Brasil. / Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios. Rio de Janeiro, RJ, Brasil / Tríade – Instituto Brasileiro para Medicina da Conservação. Recife, PE, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia de Tripanosomatídeos. Rio de Janeiro, RJ, Brasil.
Universidade de São Paulo. Departamento de Medicina Preventiva e Saúde Animal. São Paulo, SP, Brasil.
Instituto Pró-carnívoros. Atibaia, SP, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia de Tripanosomatídeos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia de Tripanosomatídeos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia de Tripanosomatídeos. Rio de Janeiro, RJ, Brasil.
Abstract: Aiming to better understand the ecological aspects of Trypanosoma cruzi transmission cycles, wild carnivores, small mammals and dogs were examined for T. cruzi infection in the Serra da Canastra National Park region, Brazil. Isolates were genotyped using mini-exon gene and PCR-RFLP (1f8 and H3) genomic targets. Trypanosoma cruzi transmission was well established in the area and occurred in both wild and peridomestic environments. Dog seroprevalence was 29·4% (63/214) and TcI and TcII genotypes, besides mixed infections were observed. Only TcI was detected in wild mammals. Marsupials displayed lower relative abundance, but a high prevalence of positive haemocultures (4/22), whereas rodents displayed positive haemocultures (9/113) mainly in the abundant Akodon montensis and Cerradomys subflavus species. The felid Leopardus pardalis was the only carnivore to display positive haemoculture and was captured in the same region where the small mammal prevalence of T. cruzi infection was high. Two canid species, Chrysocyon brachyurus and Cerdocyon thous, were serologically positive for T. cruzi infection (4/8 and 8/39, respectively), probably related to their capacity to exploit different ecological niches. Herein, dog infection not only signals T. cruzi transmission but also the genotypes present. Distinct transmission strategies of the T. cruzi genotypes are discussed.
Keywords: transmission cycles
trophic network
reservoir
Discrete Typing Units
Chagas disease
Serra da Canastra National Park
Brazil
keywords: Doença de Chagas
Parque Nacional da Serra da Canastra
Reservatório
Rede trófica
Ciclos de transmissão
Issue Date: 2013
Publisher: Cambridge University Press
Citation: ROCHA, Fabiana Lopes; et al. Trypanosoma cruzi TcI and TcII transmission among wild carnivores, small mammals and dogs in a conservation unit and surrounding areas, Brazil. Parasitology, v.140, p.160–170, 2013.
DOI: 10.1017/S0031182012001539
ISSN: 0031-1820
Copyright: restricted access
Appears in Collections:IOC - Artigos de Periódicos

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