Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry

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...

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Autores principales:	Gaspe, M.S., Gurevitz, J.M., Gürtler, R.E., Dujardin, J.-P.
Formato:	JOUR
Materias:	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 Animals Body Size Female Humans Insect Control Insect Vectors Insecticides Male Pyrethrins Triatoma Wing
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_15671348_v17_n_p93_Gaspe
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_15671348_v17_n_p93_Gaspe
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spelling	todo:paper_15671348_v17_n_p93_Gaspe2023-10-03T16:26:30Z Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry Gaspe, M.S. Gurevitz, J.M. Gürtler, R.E. Dujardin, J.-P. 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 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. Fil:Gaspe, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gurevitz, J.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gürtler, R.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15671348_v17_n_p93_Gaspe
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	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
spellingShingle	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 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
topic_facet	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
description	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.
format	JOUR
author	Gaspe, M.S. Gurevitz, J.M. Gürtler, R.E. Dujardin, J.-P.
author_facet	Gaspe, M.S. Gurevitz, J.M. Gürtler, R.E. Dujardin, J.-P.
author_sort	Gaspe, M.S.
title	Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry
title_short	Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry
title_full	Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry
title_fullStr	Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry
title_full_unstemmed	Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry
title_sort	origins of house reinfestation with triatoma infestans after insecticide spraying in the argentine chaco using wing geometric morphometry
url	http://hdl.handle.net/20.500.12110/paper_15671348_v17_n_p93_Gaspe
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Origins of house reinfestation with Triatoma infestans after insecticide spraying in the Argentine Chaco using wing geometric morphometry

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