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Volume 52, Issue 1 (Mar 2007)


Trypanosoma cruzi-triatomine associations and the presence of mixed infections in single triatomine bugs in Paraná state, Brazil

Fernanda Spitzner
  • Departamento de Análises Clínicas, Laboratório de Parasitologia Básica, Bloco I-90, Universidade Estadual de Maringá, Av. Colombo, 5790, 87020-900, C.P. 331, Maringá, Paraná, Brazil
  • Email:
/ Jorge Freitas
  • Departamento de Bioquímica e Imunologia, Instituto de Cięncias Biológicas, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
  • Email:
/ Andréa Macedo
  • Departamento de Bioquímica e Imunologia, Instituto de Cięncias Biológicas, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
  • Email:
/ Max Ornelas Toledo
  • Departamento de Análises Clínicas, Laboratório de Parasitologia Básica, Bloco I-90, Universidade Estadual de Maringá, Av. Colombo, 5790, 87020-900, C.P. 331, Maringá, Paraná, Brazil
  • Email:
/ Silvana Araújo
  • Departamento de Análises Clínicas, Laboratório de Parasitologia Básica, Bloco I-90, Universidade Estadual de Maringá, Av. Colombo, 5790, 87020-900, C.P. 331, Maringá, Paraná, Brazil
  • Email:
/ Alberto Prioli
  • Departamento de Biologia Celular e Genética, Universidade Estadual de Maringá, Brazil
  • Email:
/ Mônica Gomes
  • Departamento de Análises Clínicas, Laboratório de Parasitologia Básica, Bloco I-90, Universidade Estadual de Maringá, Av. Colombo, 5790, 87020-900, C.P. 331, Maringá, Paraná, Brazil
  • Email:
Published Online: 2007-03-01 | DOI: https://doi.org/10.2478/s11686-007-0005-4


Eighteen strains of Trypanosoma cruzi isolated from two species of triatomines in the state of Paraná, Brazil, were characterized molecularly using three strategies: RAPD (randomly amplified polymorphic DNA) with four primers, analysis of the D7 polymorphic region of the 24Sα rDNA, and RFLP (restriction fragment length polymorphism) of region 5′ of the mitochondrial gene COII (cytochrome oxidase subunit 2). The phenogram constructed with the RAPD data showed that only three strains isolated from Panstrongylus megistus collected in the Municipality of Arapongas were grouped together in a sub-branch. None of the other 15 strains could be clustered according to triatomine species or geographical origin. The strains were grouped with the T. cruzi I reference sample, indicating closer association with the sylvatic transmission cycle of T. cruzi in the state of Paraná. However, analyses of the rDNA and COII gene polymorphisms revealed the presence of populations from both T. cruzi I and II major lineages. In half of the analyzed triatomines, we found parasites from both lineages coinfecting the same bugs. Of these, most (6/9) were isolated from Triatoma sordida, and 3/9 from Panstrongylus megistus. These results contribute to a better comprehension of the ecoepidemiology of Chagas’ disease in Paraná, and raise questions about the role of studies of polyclonal population dynamics for controlling the transmission of T. cruzi to humans in this region.

Keywords: Trypanosoma cruzi; triatomines; RAPD; rDNA; mitochondrial DNA

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About the article

Published Online: 2007-03-01

Published in Print: 2007-03-01

Citation Information: Acta Parasitologica, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.2478/s11686-007-0005-4. Export Citation

© 2007 W. Stefański Institute of Parasitology, PAS. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. (CC BY-NC-ND 3.0)

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