Browsing by Autor "Francisco Panzera"

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Evolutionary relationships based on genetic and phenetic characters between Triatoma maculata, Triatoma pseudomaculata and morphologically related species (Reduviidae: Triatominae)
(Elsevier BV, 2007) Silvia Menezes dos Santos; Catarina Macedo Lopes; Jean Dujardin; Francisco Panzera; Ruben Pérez; Ana Laura Carbajal-de-la-Fuente; R. S. Pacheco; François Noireau
Genomic Changes of Chagas Disease Vector, South America
(Centers for Disease Control and Prevention, 2004) Francisco Panzera; Jean Dujardin; Paula Nicolini; Marı́a Noel Caraccio; Virginia De Rose; Tatiana Tellez; Hernán Bermúdez; M. Dolores Bargues; Santiago Mas‐Coma; José‐Enrique O’Connor
We analyzed the main karyologic changes that have occurred during the dispersion of Triatoma infestans, the main vector of Chagas disease. We identified two allopatric groups, named Andean and non-Andean. The Andean specimens present C-heterochromatic blocks in most of their 22 chromosomes, whereas non-Andean specimens have only 4-7 autosomes with C-banding. These heterochromatin differences are the likely cause of a striking DNA content variation (approximately 30%) between Andean and non-Andean insects. Our study, together with previous historical and genetic data, suggests that T. infestans was originally a sylvatic species, with large quantities of DNA and heterochromatin, inhabiting the Andean region of Bolivia. However, the spread of domestic T. infestans throughout the non-Andean regions only involved insects with an important reduction of heterochromatin and DNA amounts. We propose that heterochromatin and DNA variation mainly reflected adaptive genomic changes that contribute to the ability of T. infestans to survive, reproduce, and disperse in different environments.
Mitochondrial DNA variation of Triatoma infestans populations and its implication on the specific status of T. melanosoma
(Instituto Oswaldo Cruz, Ministério da Saúde, 1999) Fernando A. Monteiro; Ruben Pérez; Francisco Panzera; Jean-Pierre Dujardin; Cléber Galvão; Deyse Rocha; François Noireau; Chris Schofield; Charles B. Beard
DNA sequence comparison of 412 base-pairs fragments of the mitochondrial cytochrome B gene was used to infer the genetic structure of nine geographical Triatoma infestans populations and their phylogenetic relationship with T. melanosoma and T. brasiliensis. T. infestans and T. melanosoma were compared by morphometry, allozyme and cytogenetic analyses, as well as subjected to reciprocal crosses, in order to clarify the taxonomic status of the latter. No differences were found to distinguish the two species and the crosses between them yielded progeny. T. infestans populations presented four haplotypes that could be separated in two clusters: one formed by the samples from Bolivia (Andes and Chaco) and the other formed by samples from Argentina and Brazil. Silvatic and domestic T. infestans populations from Bolivia (Andes) were genetically identical.
Sylvatic population of Triatoma infestans from the Bolivian Chaco: from field collection to characterization
(Instituto Oswaldo Cruz, Ministério da Saúde, 2000) François Noireau; Brigitte Bastrenta; Silvia Catalá; Jean-Pierre Dujardin; Francisco Panzera; Magdalena Torres; Ruben Pérez; Cléber Galvão; José Jurberg
A sylvatic Triatoma infestans DM (dark morph) population detected in the Bolivian Chaco was characterized and compared with various domestic ones. The degree of differentiation of DM was clearly within the T. infestans intra-specific level. Nevertheless marked chromatic and morphometric differences as well as differences in antennal pattern, chromosome banding and randomly amplified polymorphic DNA support the hypothesis of a distinct population. Continuous exchange of insects between wild and domestic habitats seems unlikely in the Chaco.
Which species of Rhodnius is invading houses in Brazil?
(Oxford University Press, 1991) Jean‐Pierre Dujardin; Marco Túlio Antônio García-Zapata; José Jurberg; Patricia Roelants; L. Cardozo; Francisco Panzera; João Carlos Pinto Dias; C.J. Schofield
Journal Article Which species of Rhodnius is invading houses in Brazil? Get access J.P. Dujardin, J.P. Dujardin ∗ 1Institut de Médecine Tropicale Prince Léopold, Nationalestraat 155, B-2000, Antwerpen, Belgium2ORSTOM, Centre de Montpellier, 2051 Avenue du Val de Montferrand, BP 5045, F-34032 Montpellier cedex 1, France ∗Author for correspondence (Montpellier address). Search for other works by this author on: Oxford Academic PubMed Google Scholar M.T. Garcia-Zapata, M.T. Garcia-Zapata 3Nucleo de Medicina Tropical, Universidade de Brasília, CP 15-2924-UNB, Brasília, DF, 70-919, Brazil Search for other works by this author on: Oxford Academic PubMed Google Scholar J. Jurberg, J. Jurberg 4FIOCRUZ, Laboratorio Nacional e Internacional de Referencia em Taxonomia de Triatomineos, Departamento de Entomologia, Av. Brasil 4365, CP 926, Rio de Janeiro, RJ, 20041 Brazil Search for other works by this author on: Oxford Academic PubMed Google Scholar P. Roelants, P. Roelants 1Institut de Médecine Tropicale Prince Léopold, Nationalestraat 155, B-2000, Antwerpen, Belgium Search for other works by this author on: Oxford Academic PubMed Google Scholar L. Cardozo, L. Cardozo 5Centro Nacional de Enfermedades Tropicales, Casilla 2974, Santa Cruz, Bolivia Search for other works by this author on: Oxford Academic PubMed Google Scholar F. Panzera, F. Panzera 6Departamento de Genetica, Universidad de la Republica, Calle Tristan Narvaja 1674, 11200 Montevideo, Uruguay Search for other works by this author on: Oxford Academic PubMed Google Scholar J.C.P. Dias, J.C.P. Dias 7Centro de Pesquisas Rene Rachou, CP 1743, 30000 Belo Horizonte, MG, Brazil Search for other works by this author on: Oxford Academic PubMed Google Scholar C.J. Schofield C.J. Schofield 8Division of Medical Entomology, Natural History Museum, London, SW7 5BD, UK Search for other works by this author on: Oxford Academic PubMed Google Scholar Transactions of The Royal Society of Tropical Medicine and Hygiene, Volume 85, Issue 5, September-October 1991, Pages 679–680, https://doi.org/10.1016/0035-9203(91)90394-E Published: 01 September 1991 Article history Received: 29 January 1991 Revision received: 01 May 1991 Accepted: 01 May 1991 Published: 01 September 1991