Comparison of two sampling methods for domestic populations of Triatoma infestans in north‐west Argentina

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Abstract. In mud‐and‐thatch houses of Santiago del Estero Province, northwest Argentina, where no insecticides had been sprayed officially to control domestic infestations of the Chagas disease vector Triatoma infestans (Klug) (Hemiptera: Reduviidae), two knockdown (KD) insecticidal collection proce...

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Autores principales:	Gürtler, R.E., Schweigmann, N.J., Cecere, M.C., Chuit, R., Wisnivesky-Colli, C.
Formato:	JOUR
Materias:	Argentina Chagas disease deltamethrin domestic bugs insecticides knockdown agents sampling methods tetramethrin Triatoma infestans vector density γ‐HCH insecticide lindane nitrile pyrethroid animal article comparative study housing methodology population density Triatoma zoology Animals Entomology Housing Insecticides Lindane Nitriles Population Density Pyrethrins
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_0269283X_v7_n3_p238_Gurtler
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_0269283X_v7_n3_p238_Gurtler2023-10-03T15:14:10Z Comparison of two sampling methods for domestic populations of Triatoma infestans in north‐west Argentina Gürtler, R.E. Schweigmann, N.J. Cecere, M.C. Chuit, R. Wisnivesky-Colli, C. Argentina Chagas disease deltamethrin domestic bugs insecticides knockdown agents sampling methods tetramethrin Triatoma infestans vector density γ‐HCH deltamethrin insecticide lindane nitrile pyrethroid tetramethrin animal Argentina article comparative study housing methodology population density Triatoma zoology Animals Argentina Entomology Housing Insecticides Lindane Nitriles Population Density Pyrethrins Triatoma Abstract. In mud‐and‐thatch houses of Santiago del Estero Province, northwest Argentina, where no insecticides had been sprayed officially to control domestic infestations of the Chagas disease vector Triatoma infestans (Klug) (Hemiptera: Reduviidae), two knockdown (KD) insecticidal collection procedures were compared with the standard flush‐out (FO) method for sampling T. infestans. Bugs were collected by FO using 0.2% tetramethrin in bedrooms of (1) 41 houses of Amama village employing 1 man‐hour of capture effort per house, and (2) 19 houses of Trinidad and Mercedes villages employing 4 man‐hours/house. From the same houses, 2‐5 days after the manual FO collection, bugs were collected by KD indoor‐spraying of deltamethrin 25mga.i./m2 in Amama, or burning of one γ‐HCH (=γ‐BHC) fumigant tablet 3.1g of γ‐isomer) per bedroom in Trinidad and Mercedes. The majority of infestations were detected by both methods, the proportion of positive houses being 81% at Amama and 95% at the other villages. Although the FO method was more sensitive, at least because it was applied first, the KD method detected infestations in 25% of houses where bugs were not found by FO. Bug densities estimated by FO or by subsequent KD in each house were significantly correlated: r = 0.795 for deltamethrin; r= 0.882 for y‐HCH. Compared with FO collections of T.infestans large stages, i.e. adults plus fourth and fifth instar nymphs, the KD catch averaged 0.88x with deltamethrin and 0.57× with γ‐HCH, regardless of the apparent population density of bugs per house. However, the KD method has practical advantages of speed and standardization. Copyright © 1993, Wiley Blackwell. All rights reserved Fil:Gürtler, R.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Schweigmann, N.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cecere, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Wisnivesky-Colli, C. 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_0269283X_v7_n3_p238_Gurtler
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Argentina Chagas disease deltamethrin domestic bugs insecticides knockdown agents sampling methods tetramethrin Triatoma infestans vector density γ‐HCH deltamethrin insecticide lindane nitrile pyrethroid tetramethrin animal Argentina article comparative study housing methodology population density Triatoma zoology Animals Argentina Entomology Housing Insecticides Lindane Nitriles Population Density Pyrethrins Triatoma
spellingShingle	Argentina Chagas disease deltamethrin domestic bugs insecticides knockdown agents sampling methods tetramethrin Triatoma infestans vector density γ‐HCH deltamethrin insecticide lindane nitrile pyrethroid tetramethrin animal Argentina article comparative study housing methodology population density Triatoma zoology Animals Argentina Entomology Housing Insecticides Lindane Nitriles Population Density Pyrethrins Triatoma Gürtler, R.E. Schweigmann, N.J. Cecere, M.C. Chuit, R. Wisnivesky-Colli, C. Comparison of two sampling methods for domestic populations of Triatoma infestans in north‐west Argentina
topic_facet	Argentina Chagas disease deltamethrin domestic bugs insecticides knockdown agents sampling methods tetramethrin Triatoma infestans vector density γ‐HCH deltamethrin insecticide lindane nitrile pyrethroid tetramethrin animal Argentina article comparative study housing methodology population density Triatoma zoology Animals Argentina Entomology Housing Insecticides Lindane Nitriles Population Density Pyrethrins Triatoma
description	Abstract. In mud‐and‐thatch houses of Santiago del Estero Province, northwest Argentina, where no insecticides had been sprayed officially to control domestic infestations of the Chagas disease vector Triatoma infestans (Klug) (Hemiptera: Reduviidae), two knockdown (KD) insecticidal collection procedures were compared with the standard flush‐out (FO) method for sampling T. infestans. Bugs were collected by FO using 0.2% tetramethrin in bedrooms of (1) 41 houses of Amama village employing 1 man‐hour of capture effort per house, and (2) 19 houses of Trinidad and Mercedes villages employing 4 man‐hours/house. From the same houses, 2‐5 days after the manual FO collection, bugs were collected by KD indoor‐spraying of deltamethrin 25mga.i./m2 in Amama, or burning of one γ‐HCH (=γ‐BHC) fumigant tablet 3.1g of γ‐isomer) per bedroom in Trinidad and Mercedes. The majority of infestations were detected by both methods, the proportion of positive houses being 81% at Amama and 95% at the other villages. Although the FO method was more sensitive, at least because it was applied first, the KD method detected infestations in 25% of houses where bugs were not found by FO. Bug densities estimated by FO or by subsequent KD in each house were significantly correlated: r = 0.795 for deltamethrin; r= 0.882 for y‐HCH. Compared with FO collections of T.infestans large stages, i.e. adults plus fourth and fifth instar nymphs, the KD catch averaged 0.88x with deltamethrin and 0.57× with γ‐HCH, regardless of the apparent population density of bugs per house. However, the KD method has practical advantages of speed and standardization. Copyright © 1993, Wiley Blackwell. All rights reserved
format	JOUR
author	Gürtler, R.E. Schweigmann, N.J. Cecere, M.C. Chuit, R. Wisnivesky-Colli, C.
author_facet	Gürtler, R.E. Schweigmann, N.J. Cecere, M.C. Chuit, R. Wisnivesky-Colli, C.
author_sort	Gürtler, R.E.
title	Comparison of two sampling methods for domestic populations of Triatoma infestans in north‐west Argentina
title_short	Comparison of two sampling methods for domestic populations of Triatoma infestans in north‐west Argentina
title_full	Comparison of two sampling methods for domestic populations of Triatoma infestans in north‐west Argentina
title_fullStr	Comparison of two sampling methods for domestic populations of Triatoma infestans in north‐west Argentina
title_full_unstemmed	Comparison of two sampling methods for domestic populations of Triatoma infestans in north‐west Argentina
title_sort	comparison of two sampling methods for domestic populations of triatoma infestans in north‐west argentina
url	http://hdl.handle.net/20.500.12110/paper_0269283X_v7_n3_p238_Gurtler
work_keys_str_mv	AT gurtlerre comparisonoftwosamplingmethodsfordomesticpopulationsoftriatomainfestansinnorthwestargentina AT schweigmannnj comparisonoftwosamplingmethodsfordomesticpopulationsoftriatomainfestansinnorthwestargentina AT ceceremc comparisonoftwosamplingmethodsfordomesticpopulationsoftriatomainfestansinnorthwestargentina AT chuitr comparisonoftwosamplingmethodsfordomesticpopulationsoftriatomainfestansinnorthwestargentina AT wisniveskycollic comparisonoftwosamplingmethodsfordomesticpopulationsoftriatomainfestansinnorthwestargentina
_version_	1807321286539476992

Comparison of two sampling methods for domestic populations of Triatoma infestans in north‐west Argentina

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