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Abstract:

Identifying the origins of insect vectors collected after community-wide residual insecticide applications is a relevant challenge in the Gran Chaco region where the main vector of Chagas disease Triatoma infestans usually reinfests human dwellings. Wing geometric morphometry was used to compare the right wings of 63 males and 54 females collected at 4. months post-spraying (MPS) with those from 165 males and 111 females collected before full-coverage spraying with pyrethroids in a well-defined rural area in Northeastern Argentina. Male and female wing centroid size resulted significantly larger at 4. MPS than before interventions, but no significant changes in shape were detected. Metric disparity (variance of shape) varied significantly in males but not in females. Using shape variables, a relatively large fraction of post-spraying males (70%) and females (54%) could not be differentiated from those collected at the same source house or at the nearest infested house before interventions. Bugs collected at 4 and 8. MPS in a persistently infested house were mainly assigned to the source house. These results support the hypothesis of persistent bug populations that survived the insecticide application at local spatial scales, and are consistent with the occurrence of vector control failures most likely related to moderate pyrethroid resistance. Wing geometric morphometry is a useful tool for identifying sources of reinfestation, but it is limited by the spatial structure found in the reference populations. Combined with field and genetic data, this approach may contribute to the understanding of the reinfestation process and improvement of vector control strategies. © 2013 Elsevier B.V.

Registro:

Documento: Artículo
Título:Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry
Autor:Gaspe, M.S.; Gurevitz, J.M.; Gürtler, R.E.; Dujardin, J.-P.
Filiación:Laboratorio de Eco-Epidemiología, Depto. de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires-IEGEBA (CONICET-UBA), Ciudad Universitaria, 1428EHA Buenos Aires, Argentina
Unité Mixte de Recherche (UMR), Inst.s de Recherches pour le Développement (IRD), Centre National de Recherche Scientifique (CNRS), F-34394 Montpellier, France
Palabras clave:Geometric morphometry; Pyrethroid insecticide resistance; Reinfestation; Triatoma infestans; insecticide; pyrethroid; aerosol; allometry; anatomical variation; Argentina; article; controlled study; female; forelimb; geometric morphometry; infestation; male; morphometrics; nonhuman; priority journal; rural area; sex difference; survival; Triatoma infestans; Animals; Argentina; Body Size; Female; Humans; Insect Control; Insect Vectors; Insecticides; Male; Pyrethrins; Triatoma; Wing
Año:2013
Volumen:17
Página de inicio:93
Página de fin:100
DOI: http://dx.doi.org/10.1016/j.meegid.2013.03.044
Título revista:Infection, Genetics and Evolution
Título revista abreviado:Infec. Genet. Evol.
ISSN:15671348
CODEN:IGENC
CAS:Insecticides; Pyrethrins
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15671348_v17_n_p93_Gaspe

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Citas:

---------- APA ----------
Gaspe, M.S., Gurevitz, J.M., Gürtler, R.E. & Dujardin, J.-P. (2013) . Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry. Infection, Genetics and Evolution, 17, 93-100.
http://dx.doi.org/10.1016/j.meegid.2013.03.044
---------- CHICAGO ----------
Gaspe, M.S., Gurevitz, J.M., Gürtler, R.E., Dujardin, J.-P. "Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry" . Infection, Genetics and Evolution 17 (2013) : 93-100.
http://dx.doi.org/10.1016/j.meegid.2013.03.044
---------- MLA ----------
Gaspe, M.S., Gurevitz, J.M., Gürtler, R.E., Dujardin, J.-P. "Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry" . Infection, Genetics and Evolution, vol. 17, 2013, pp. 93-100.
http://dx.doi.org/10.1016/j.meegid.2013.03.044
---------- VANCOUVER ----------
Gaspe, M.S., Gurevitz, J.M., Gürtler, R.E., Dujardin, J.-P. Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry. Infec. Genet. Evol. 2013;17:93-100.
http://dx.doi.org/10.1016/j.meegid.2013.03.044