Persistence of malathion used in dengue control on household surfaces

Author(s)

Regina Cristina Batista Ferreira ^[1] ; Solange Papini ^[2] ; Luiz Carlos Luchini ^[3] ; Eliane Vieira ^[4]

Affiliation

^[1] Instituto Biológico - Brasil

^[2] Secretária da Saúde do Município de São Paulo - Brasil

^[3] Instituto Biológico - Brasil

^[4] Instituto Biológico - Brasil

• Document type: Journal article
• Source: Arq. Inst. Biol.; v. 86, 2019-08-15.

Abstract

ABSTRACT: Dengue is a viral infection transmitted by the mosquito Aedes aegypti. In Brazil, one of the insecticides used to control the mosquito is malathion, which can be diluted in vegetable oil (1:2 v/v). The purpose of this study was to understand the persistence of malathion on different surfaces and soil. Surfaces were contaminated by malathion and then washed with water and soap. The water used to clean the surfaces was extracted and analyzed by gas chromatography with an FID detector. Soil samples received malathion 14C-TG diluted in vegetable oil (1:2 v/v) and were analyzed zero, 3, 7, 18, 32, 60, 120, 240, and 360 days after the application in a liquid scintillation analyzer. Results showed a high persistence of malathion on porous surfaces. Moreover, it did not degrade in the soil for the first 120 days. (AU)

• FAPESP's process: 12/51164-0 - Establishment of procedures for cleaning of different surfaces household exposed to syrup malathion used in Aedes aegypti control
• Grantee: Solange Papini
• Support Opportunities: Regular Research Grants