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Abstract:

House re-invasion by native triatomines after insecticide-based control campaigns represents a major threat for Chagas disease vector control. We conducted a longitudinal intervention study in a rural section (Area III, 407 houses) of Pampa del Indio, northeastern Argentina, and used wing geometric morphometry to compare pre-spray and post-spray (re-infestant bugs) Triatoma infestans populations. The community-wide spraying with pyrethroids reduced the prevalence of house infestation by T. infestans from 31.9% to < 1% during a four-year follow-up, unlike our previous studies in the neighbouring Area I. Two groups of bug collection sites differing in wing shape variables before interventions (including 221 adults from 11 domiciles) were used as a reference for assigning 44 post-spray adults. Wing shape variables from post-spray, high-density bug colonies and pre-spray groups were significantly different, suggesting that re-infestant insects had an external origin. Insects from one house differed strongly in wing shape variables from all other specimens. A further comparison between insects from both areas supported the existence of independent re-infestation processes within the same district. These results point to local heterogeneities in house re-infestation dynamics and emphasise the need to expand the geographic coverage of vector surveillance and control operations to the affected region. © 2015, Fundacao Oswaldo Cruz. All rights reserved.

Registro:

Documento: Artículo
Título:Where do these bugs come from? Phenotypic structure of triatoma infestans populations after control interventions in the Argentine Chaco
Autor:Gaspe, M.S.; Provecho, Y.M.; Piccinali, R.V.; Gürtler, R.E.
Filiación:Laboratory of Eco-Epidemiology, Department of Ecology, Genetics and Evolution, Instituto de Ecología, Genética y Evolución, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:Geometric morphometry; Gran Chaco; Re-infestation; Triatoma infestans; Vector control; Hexapoda; Triatoma infestans; insecticide; pyrethroid; anatomy and histology; animal; Argentina; Chagas disease; drug effects; female; insect control; insect vector; longitudinal study; male; procedures; rural population; transmission; Triatoma; wing; Animals; Argentina; Chagas Disease; Female; Insect Control; Insect Vectors; Insecticides; Longitudinal Studies; Male; Pyrethrins; Rural Population; Triatoma; Wings, Animal
Año:2015
Volumen:110
Número:3
Página de inicio:310
Página de fin:318
DOI: http://dx.doi.org/10.1590/0074-02760140376
Título revista:Memorias do Instituto Oswaldo Cruz
Título revista abreviado:Mem. Inst. Oswaldo Cruz
ISSN:00740276
CAS:Insecticides; Pyrethrins
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00740276_v110_n3_p310_Gaspe

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Citas:

---------- APA ----------
Gaspe, M.S., Provecho, Y.M., Piccinali, R.V. & Gürtler, R.E. (2015) . Where do these bugs come from? Phenotypic structure of triatoma infestans populations after control interventions in the Argentine Chaco. Memorias do Instituto Oswaldo Cruz, 110(3), 310-318.
http://dx.doi.org/10.1590/0074-02760140376
---------- CHICAGO ----------
Gaspe, M.S., Provecho, Y.M., Piccinali, R.V., Gürtler, R.E. "Where do these bugs come from? Phenotypic structure of triatoma infestans populations after control interventions in the Argentine Chaco" . Memorias do Instituto Oswaldo Cruz 110, no. 3 (2015) : 310-318.
http://dx.doi.org/10.1590/0074-02760140376
---------- MLA ----------
Gaspe, M.S., Provecho, Y.M., Piccinali, R.V., Gürtler, R.E. "Where do these bugs come from? Phenotypic structure of triatoma infestans populations after control interventions in the Argentine Chaco" . Memorias do Instituto Oswaldo Cruz, vol. 110, no. 3, 2015, pp. 310-318.
http://dx.doi.org/10.1590/0074-02760140376
---------- VANCOUVER ----------
Gaspe, M.S., Provecho, Y.M., Piccinali, R.V., Gürtler, R.E. Where do these bugs come from? Phenotypic structure of triatoma infestans populations after control interventions in the Argentine Chaco. Mem. Inst. Oswaldo Cruz. 2015;110(3):310-318.
http://dx.doi.org/10.1590/0074-02760140376