Effectiveness of residual spraying of peridomestic ecotopes with deltamethrin and permethrin on Triatoma infestans in rural western Argentina: A district-wide randomized trial

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Objective: To compare the effectiveness of a single residual spraying of pyrethroids on the occurrence and abundance of Triatoma infestans in peridomestic ecotopes in rural La Rioja. Methods: A total of 667 (32.8%) peridomestic sites positive for T. infestans in May 1999 were randomly assigned to tr...

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Autores principales: Gürtler, R.E., Canale, D.M., Spillmann, C., Stariolo, R., Salomón, O.D., Blanco, S., Segura, E.L.
Formato: JOUR
Materias:
Argentina
Insect control/methods
Pyrethrins/administration and dosage
Randomized controlled trials
Triatoma/drug effects
deltamethrin
permethrin
pyrethroid
insecticide
pest control
article
Chagas disease
domestic animal
infection control
infestation
pesticide spraying
regression analysis
residue analysis
rural area
Triatoma infestans
vector control
Animals
Humans
Insect Control
Insecticides
Nitriles
Permethrin
Pyrethrins
Rural Population
Triatoma
South America
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00429686_v82_n3_p196_Gurtler
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00429686_v82_n3_p196_Gurtler
record_format dspace
spelling todo:paper_00429686_v82_n3_p196_Gurtler2023-10-03T14:51:29Z Effectiveness of residual spraying of peridomestic ecotopes with deltamethrin and permethrin on Triatoma infestans in rural western Argentina: A district-wide randomized trial Gürtler, R.E. Canale, D.M. Spillmann, C. Stariolo, R. Salomón, O.D. Blanco, S. Segura, E.L. Argentina Insect control/methods Pyrethrins/administration and dosage Randomized controlled trials Triatoma/drug effects deltamethrin permethrin pyrethroid deltamethrin insecticide permethrin pest control pyrethroid Argentina article Chagas disease domestic animal infection control infestation pesticide spraying regression analysis residue analysis rural area Triatoma infestans vector control Animals Argentina Humans Insect Control Insecticides Nitriles Permethrin Pyrethrins Rural Population Triatoma Argentina South America Objective: To compare the effectiveness of a single residual spraying of pyrethroids on the occurrence and abundance of Triatoma infestans in peridomestic ecotopes in rural La Rioja. Methods: A total of 667 (32.8%) peridomestic sites positive for T. infestans in May 1999 were randomly assigned to treatment within each village, sprayed in December 1999, and reinspected in December 2000. Treatments included 2.5% suspension concentrate (SC) deltamethrin in water at 25 mg active ingredient (a.i.)/m2 applied with: (a) manual compression sprayers (standard treatment) or (b) power sprayers; (c) 1.5% emulsifiable concentrate (EC) deltamethrin at 25 mg a.i./m2; and (d) 10% EC cis-permethrin at 170 mg a.i./m2. EC pyrethroids were diluted in soybean oil and applied with power sprayers. All habitations were sprayed with the standard treatment. Findings: The prevalence of T. infestans 1-year post-spraying was significantly lower in sites treated with SC deltamethrin applied with manual (24%) or power sprayers (31%) than in sites treated with EC deltamethrin (40%) or EC permethrin (53%). The relative odds of infestation and catch of T. infestans 1-year post-spraying significantly increased with the use of EC pyrethroids, the abundance of bugs per site before spraying, total surface, and host numbers. All insecticides had poor residual effects on wooden posts. Conclusion: Most of the infestations probably originated from triatomines that survived exposure to insecticides at each site. Despite the standard treatment proving to be the most effective, the current tactics and procedures fail to eliminate peridomestic populations of T. infestans in semiarid rural areas and need to be revised. Fil:Gürtler, R.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Salomón, O.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Blanco, S. 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_00429686_v82_n3_p196_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
Insect control/methods
Pyrethrins/administration and dosage
Randomized controlled trials
Triatoma/drug effects
deltamethrin
permethrin
pyrethroid
deltamethrin
insecticide
permethrin
pest control
pyrethroid
Argentina
article
Chagas disease
domestic animal
infection control
infestation
pesticide spraying
regression analysis
residue analysis
rural area
Triatoma infestans
vector control
Animals
Argentina
Humans
Insect Control
Insecticides
Nitriles
Permethrin
Pyrethrins
Rural Population
Triatoma
Argentina
South America
spellingShingle Argentina
Insect control/methods
Pyrethrins/administration and dosage
Randomized controlled trials
Triatoma/drug effects
deltamethrin
permethrin
pyrethroid
deltamethrin
insecticide
permethrin
pest control
pyrethroid
Argentina
article
Chagas disease
domestic animal
infection control
infestation
pesticide spraying
regression analysis
residue analysis
rural area
Triatoma infestans
vector control
Animals
Argentina
Humans
Insect Control
Insecticides
Nitriles
Permethrin
Pyrethrins
Rural Population
Triatoma
Argentina
South America
Gürtler, R.E.
Canale, D.M.
Spillmann, C.
Stariolo, R.
Salomón, O.D.
Blanco, S.
Segura, E.L.
Effectiveness of residual spraying of peridomestic ecotopes with deltamethrin and permethrin on Triatoma infestans in rural western Argentina: A district-wide randomized trial
topic_facet Argentina
Insect control/methods
Pyrethrins/administration and dosage
Randomized controlled trials
Triatoma/drug effects
deltamethrin
permethrin
pyrethroid
deltamethrin
insecticide
permethrin
pest control
pyrethroid
Argentina
article
Chagas disease
domestic animal
infection control
infestation
pesticide spraying
regression analysis
residue analysis
rural area
Triatoma infestans
vector control
Animals
Argentina
Humans
Insect Control
Insecticides
Nitriles
Permethrin
Pyrethrins
Rural Population
Triatoma
Argentina
South America
description Objective: To compare the effectiveness of a single residual spraying of pyrethroids on the occurrence and abundance of Triatoma infestans in peridomestic ecotopes in rural La Rioja. Methods: A total of 667 (32.8%) peridomestic sites positive for T. infestans in May 1999 were randomly assigned to treatment within each village, sprayed in December 1999, and reinspected in December 2000. Treatments included 2.5% suspension concentrate (SC) deltamethrin in water at 25 mg active ingredient (a.i.)/m2 applied with: (a) manual compression sprayers (standard treatment) or (b) power sprayers; (c) 1.5% emulsifiable concentrate (EC) deltamethrin at 25 mg a.i./m2; and (d) 10% EC cis-permethrin at 170 mg a.i./m2. EC pyrethroids were diluted in soybean oil and applied with power sprayers. All habitations were sprayed with the standard treatment. Findings: The prevalence of T. infestans 1-year post-spraying was significantly lower in sites treated with SC deltamethrin applied with manual (24%) or power sprayers (31%) than in sites treated with EC deltamethrin (40%) or EC permethrin (53%). The relative odds of infestation and catch of T. infestans 1-year post-spraying significantly increased with the use of EC pyrethroids, the abundance of bugs per site before spraying, total surface, and host numbers. All insecticides had poor residual effects on wooden posts. Conclusion: Most of the infestations probably originated from triatomines that survived exposure to insecticides at each site. Despite the standard treatment proving to be the most effective, the current tactics and procedures fail to eliminate peridomestic populations of T. infestans in semiarid rural areas and need to be revised.
format JOUR
author Gürtler, R.E.
Canale, D.M.
Spillmann, C.
Stariolo, R.
Salomón, O.D.
Blanco, S.
Segura, E.L.
author_facet Gürtler, R.E.
Canale, D.M.
Spillmann, C.
Stariolo, R.
Salomón, O.D.
Blanco, S.
Segura, E.L.
author_sort Gürtler, R.E.
title Effectiveness of residual spraying of peridomestic ecotopes with deltamethrin and permethrin on Triatoma infestans in rural western Argentina: A district-wide randomized trial
title_short Effectiveness of residual spraying of peridomestic ecotopes with deltamethrin and permethrin on Triatoma infestans in rural western Argentina: A district-wide randomized trial
title_full Effectiveness of residual spraying of peridomestic ecotopes with deltamethrin and permethrin on Triatoma infestans in rural western Argentina: A district-wide randomized trial
title_fullStr Effectiveness of residual spraying of peridomestic ecotopes with deltamethrin and permethrin on Triatoma infestans in rural western Argentina: A district-wide randomized trial
title_full_unstemmed Effectiveness of residual spraying of peridomestic ecotopes with deltamethrin and permethrin on Triatoma infestans in rural western Argentina: A district-wide randomized trial
title_sort effectiveness of residual spraying of peridomestic ecotopes with deltamethrin and permethrin on triatoma infestans in rural western argentina: a district-wide randomized trial
url http://hdl.handle.net/20.500.12110/paper_00429686_v82_n3_p196_Gurtler
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