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Volume 7, Number 1—February 2001
Research

Emerging Chagas Disease: Trophic Network and Cycle of Transmission of Trypanosoma cruzi from Palm Trees in the Amazon

Antonio R.L. Teixeira*Comments to Author , Pedro Sadi Monteiro*, José M. Rebelo†, Enrique R. Argañaraz*, Daniela Vieira*, Liana Lauria-Pires*, Rubens Nascimento*, Cássia A. Vexenat*, Antonio R. Silva†, Steven K. Ault‡, and Jackson M. Costa‡
Author affiliations: *University of Brasília,; †Federal University of Maranhão,; ‡Pan-American Health Organization/World Health Organization, Brasília, Brazil

Main Article

Figure 6

Genotypic characterization of wild-type flagellates by PCR amplification with rDNA and mini-exon specific primers derived from Trypanosoma cruzi. A, template DNAs amplified with mini-exon intergenic spacer primers (38): Blank, negative control; Tcb, archetypic type II T. cruzi Berenice; Rp1, Dm1, Dm2 and Dm3, flagellates isolated from Rhodnius pictipes and from Didelphis marsupialis; Dm28, standard type I, sylvatic T. cruzi isolate. B, same template DNAs amplified with rDNA primers (39-41). Tcb

Figure 6. . Genotypic characterization of wild-type flagellates by PCR amplification with rDNA and mini-exon specific primers derived from Trypanosoma cruzi. A, template DNAs amplified with mini-exon intergenic spacer primers (38): Blank, negative control; Tcb, archetypic type II T. cruzi Berenice; Rp1, Dm1, Dm2 and Dm3, flagellates isolated from Rhodnius pictipes and from Didelphis marsupialis; Dm28, standard type I, sylvatic T. cruzi isolate. B, same template DNAs amplified with rDNA primers (39-41). Tcb yielded typical 300-bp band of type II lineage, whereas Rp1, Dm1, Dm2, and Dm3 and Dm28 yielded a 350-bp band of type I T. cruzi lineage, with mini-exon spacer primers. In addition, Tcb yielded typical a 125-bp band of type II, whereas the sylvatic T. cruzi isolates yielded a 110-bp band of type I, with rDNA primers. These findings confirm sylvatic Rp1, Dm1, Dm2, and Dm3 as T. cruzi.

Main Article

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Main Article

1In this study, a major ecosystem is defined as a set of ecoregions of comparable dynamics, response characteristics to disturbance, species diversity, and conservation needs. An ecoregion is a geographically distinct set of natural communities with similar species, ecologic dynamics, environmental conditions, and ecologic interactions critical for long-term persistence (1).

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