Insecticide and community interventions to control Triatoma dimidiata in localities of the State of Veracruz, Mexico.
Three different interventions to control Triatoma dimidiata in the State of Veracruz were implemented: X-1 = whole dwelling spraying, X-2 = middle wall spraying, X-3 = household cleaning. Cyfluthrin was sprayed 3 times with 8 month intervals. After each spraying, insects were collected and sent to the laboratory to be recorded and to determine genus and species of the adult triatomine bugs, and nymphs were counted. Trypanosoma cruzi presence was determined. With X-1, the infestation, colonization, and natural infection indexes were reduced to 0% in the 3 localities, with respect to t0. With X-2, the infestation index was reduced to 10% at t3 in 3 localities; the colonization index was reduced to 0% in only 1 locality at t3, and the natural infection index was reduced to 0% at t3. With X-3 the 3 indexes were not effectively reduced but they decreased with respect to the baseline study. Insecticide application to the whole dwelling is a more efficient intervention than its application to only the lower half of the walls and to the cleaning of houses.
Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, DF, Mexico. daglo@servidor.unam.mx
Gloria Rojas
GR
Wastavino
Margarita
M
Cabrera-Bravo
Guadalupe
G
García De La Torre
Mauro
M
Vences-Blanco
Adela Ruiz
AR
Hernández
Martha Bucio
MB
Torres
Yolanda Guevara
YG
Gómez
Alejandro
A
Mesa
Paz María Salazar
PM
Schettino
D000818:Animals; D003256:Community Participation; D006798:Housing; D006801:Humans; D007300:Insect Control / Q000379:methods*; D007303:Insect Vectors / Q000187:drug effects* / Q000469:parasitology; D007306:Insecticides / Q000008:administration & dosage*; D008800:Mexico; D009570:Nitriles; D015397:Program Evaluation; D011722:Pyrethrins / Q000008:administration & dosage*; D014224:Triatoma / Q000187:drug effects* / Q000469:parasitology; D014349:Trypanosoma cruzi / Q000302:isolation & purification*
D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C052570:cyfluthrin