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vol.16 suppl.2Peridomiciliary changes and implications for Triatoma brasiliensis controlBiosystematics and evolution of the Triatominae author indexsubject indexarticles search
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Cadernos de Saúde Pública

On-line version ISSN 1678-4464Print version ISSN 0102-311X


PANZERA, Francisco et al. Chromosome homogeneity in populations of Triatoma brasiliensis Neiva 1911 (Hemiptera - Reduviidae - Triatominae). Cad. Saúde Pública [online]. 2000, vol.16, suppl.2, pp.S83-S88. ISSN 1678-4464.

Triatoma brasiliensis is the most important vector of Chagas disease in the semiarid zone of the Northeast of Brazil. Several authors have reported the occurrence of four chromatic patterns with morphological, ecological, and genetic differences. In order to determine the existence of cytogenetic differentiation between these chromatic forms, we analyzed their karyotypes and the chromosome behavior during the male meiotic process. Triatoma brasiliensis shows distinct and specific chromosome characteristics, which differ from those observed in all other triatomine species. However, no cytogenetic differences were observed between the four chromatic forms of T. brasiliensis. The lack of chromosome differentiation among them could indicate that the populations of this species are in a process of differentiation that does not involve their chromosomal organization.

Keywords : Chagas Disease; Triatominae; Triatoma brasiliensis; Cytogenetics; Karyotyping.

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