Use Of Temephos For Control Of Field Population Of Aedes Aegypti In Americana São Paulo, Brazil

The control of Aedes aegypti with 1% granulated formulation of temephos has been widely used in field control programmes in Brazil. The impact of temephos application was evaluated in Americana São Paulo, where an Aedes control programme was in place since 1991. Two areas with similar conditions of Aedes infestivity were selected. In the experimental area, temephos application 1 ppm at a frequency of three-month intervals and source reduction by communities were the methods used for control, whereas in the control area only source reduction was attemped. Monthly surveillance of larval population was undertaken using the larval indicies, viz. Breteau Index (BI), Container Index (CI), and identification of Aedes aegypti types of breeding sites. Trends were also observed in relation to rainfall and minimum temperature. A covariance test was performed to compare the two different areas. Results indicated that the area subjected to temephos application presented similar levels of Aedes aegypti larval infestation as the untreated area. The larval infestation varied with the degree of rainfall but not with temperature. Positive breeding sites for Aedes aegypti more frequently encountered were plant vases, tanks and drums in the experimental area. A comprehensive operational research study is required to determine the causes of failure of temephos to suppress the Aedes aegypti population under an operational programme.26173177Gubler, D.J., Dengue and dengue haemorrhagic fever: Its history and resurgence as a global public health problem (1997) Dengue and Dengue Aemorrhagic Fever, pp. 1-20. , Gubler DJ and Kuno G (Eds). CAB International, New YorkDonalisio, M.R., (1999) O Dengue No Espaço Habitado, , 1a ed. Hucitec São PauloTeixeira, M.G., Barreto, M.L., Guerra, Z., Epidemiologia e medidas de prevenção do dengue (1999) Informe Epidemiológico Do SUS, 8 (4), pp. 5-33Plan continental de ampliación e intensificación del combate a Aedes aegypti (1998) Revista Panamericana de Saúde Pública, 3 (2), pp. 124-130. , Organização Pan Americana de SaúdeBrown, A.W.A., Insecticide resistance in mosquitos: A pragmatic review (1986) Journal American Mosquito Control Association, 2, pp. 123-140Rawlins, S.C., Spatial distribution of insecticide resistance in Caribbean population of Aedes aegypti and its significance (1998) Revista Pan Americana de Saúde Pública, 4 (4)Marcoris, M.L., Andrighetti, M.T., Takaku, L., Glasser, C., Garbeloto, V.C., Cirino, V.C., Altercão de resposta de susceptibilidade de Aedes aegypti a insecticidas organofosforados em municípios do estado de São Paulo, Brazil (1999) Revista de Saúde Pública, 33 (5), pp. 521-522Campos, J., Andrade, A.F., Larval susceptability to chemical insecticides of two Aedes aegypti populations (2001) Revista de Saúde Pública, 35 (3), pp. 232-23