title: Comparison of insecticidal paint and deltamethrin against Triatoma infestans (Hemiptera: Reduviidae) feeding and mortality in simulated natural conditions.
abstract: The vector of Chagas disease, Triatoma infestans, is largely controlled by the household application of pyrethroid insecticides. Because effective, large-scale insecticide application is costly and necessitates numerous trained personnel, alternative control techniques are badly needed. We compared the residual effect of organophosphate-based insecticidal paint (Inesfly 5A IGR™ (I5A)) to standard deltamethrin, and a negative control, against T. infestans in a simulated natural environment. We evaluated mortality, knockdown, and ability to take a blood meal among 5(th) instar nymphs. I5A paint caused significantly greater mortality at time points up to nine months compared to deltamethrin (Fisher's Exact Test, p < 0.01 in all instances). A year following application, mortality among nymphs in the I5A was similar to those in the deltamethrin (χ2 = 0.76, df=1, p < 0.76). At months 0 and 1 after application, fewer nymphs exposed to deltamethrin took a blood meal compared to insects exposed to paint (Fisher's Exact Tests, p < 0.01 and p < 0.01, respectively). Insecticidal paint may provide an easily-applied means of protection against vectors of Chagas disease.
authors.affiliation: Department of Global Health Systems and Development, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA 70112, USA.
authors.forename: Kathleen M
authors.initials: KM
authors.lastname: Maloney
authors.forename: Jenny
authors.initials: J
authors.lastname: Ancca-Juarez
authors.forename: Renzo
authors.initials: R
authors.lastname: Salazar
authors.forename: Katty
authors.initials: K
authors.lastname: Borrini-Mayori
authors.forename: Malwina
authors.initials: M
authors.lastname: Niemierko
authors.forename: Joshua O
authors.initials: JO
authors.lastname: Yukich
authors.forename: Cesar
authors.initials: C
authors.lastname: Naquira
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Keating
authors.forename: Michael Z
authors.initials: MZ
authors.lastname: Levy
mesh_terms: D000818:Animals; D004390:Chlorpyrifos / Q000494:pharmacology; D003976:Diazinon / Q000494:pharmacology; D007303:Insect Vectors / Q000187:drug effects*; D007306:Insecticides / Q000494:pharmacology*; D009570:Nitriles / Q000494:pharmacology*; D009758:Nymph / Q000187:drug effects; D010150:Paint; D011722:Pyrethrins / Q000494:pharmacology*; D011725:Pyridines / Q000494:pharmacology; D014224:Triatoma / Q000187:drug effects*
chemical_list: D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; D011725:Pyridines; C017180:decamethrin; C055613:pyriproxyfen; D004390:Chlorpyrifos; D003976:Diazinon