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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 100, No. 8, 2005, pp. 909-914
Bioline Code: oc05182
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 100, No. 8, 2005, pp. 909-914

 en Analysis of antenal sensilla patterns of Rhodnius prolixus check for this species in other resources from Colombia and Venezuela
Lyda Esteban; Víctor Manuel Angulo; M Dora Feliciangeli & Silvia Catalá


Antennal sensilla patterns were used to analyze population variation of domestic Rhodnius prolixus check for this species in other resources from six departments and states representing three biogeographical regions of Colombia and Venezuela. Discriminant analysis of the patterns of mechanoreceptors and of three types of chemoreceptors on the pedicel and flagellar segments showed clear differentiation between R. prolixus populations east and west of the Andean Cordillera. The distribution of thick and thin-walled trichoids on the second flagellar segment also showed correlation with latitude, but this was not seen in the patterns of other sensilla. The results of the sensilla patterns appear to be reflecting biogeographic features or population isolation rather than characters associated with different habitats and lend support to the idea that domestic R. prolixus originated in the eastern region of the Andes

Chagas disease - sensilla patterns - Rhodnius prolixus - Triatominae - Colombia - Venezuela

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