Cadernos de Saúde Pública
Print version ISSN 0102-311X
OLIVEIRA FILHO, Alfredo M. et al. Focal and total residual insecticide spraying to control Triatoma brasiliensis and Triatoma pseudomaculata in Northeast Brazil. Cad. Saúde Pública [online]. 2000, vol.16, suppl.2, pp. S105-S111. ISSN 0102-311X. http://dx.doi.org/10.1590/S0102-311X2000000800014.
To efficiently control the triatomines Triatoma brasiliensis and Triatoma pseudomaculata, a field trial was performed to compare conventional versus focal spraying of deltamethrin 5% SC at 25 mg a.i./m2 and the slow-release organophosphate malathion 8.3% SR at 2g a.i./m2. The assay took place in the county of Boa Viagem, Ceará State, with 1541 households, randomly separated into 4 groups. Two of them received focal spraying: PT, treated with deltamethrin indoors and in the peridomicile, and PL, which received slow-release malathion in the same circumstances. The other groups received conventional, i.e., total application: PT with deltamethrin in the intra- and peridomicile, and PL, which was treated with deltamethrin indoors and slow-release malathion in the peridomicile. Entomological surveys at 6 and 12 months post-treatment showed better results for mixed treatment, the PL group, probably due to good indoor performance for the pyrethroid and better performance of the slow-release formulation under the hostile peridomiciliary conditions. Domestic animal shelters underwent numerous modifications over the course of the year, fostering reduced insecticide performance in the peridomicile.
Keywords : Chagas Disease; Triatominae; Insect Vectors; Vector Control; Prevention and Control.