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Surveillance of resistance to organosynthetic insecticides in Anopheles albimanus and Aedes aegypti from Ecuador 2019

Abstract:

Anopheles and Aedes are the genera that group the species that cause vector diseases such as malaria and other arboviral diseases. The climatic conditions in countries like Ecuador favor the propagation of the vector at any time of the year and the prolonged use of insecticides in these species for their control, has developed resistance to them. The objective of this study was to evaluate resistance to organosinthetic insecticides in Anopheles albimanus and Aedes aegypti in 8 provinces of Ecuador in 2019. Using the adult bottle test and the larval immersion method. The analysis of the results was carried out using graphed tables in the Excel program, yielding the sigmoidal curve. Aedes Aegypti presented resistance to the insecticide pyrethroid deltamethrin in almost all the localities studied, to the organophosphate malathion in 66% and to temephos in 50 percent. Anopheles albimanus presented resistance to the insecticide pyrethroid deltamethrin in more than 50% of the studied localities and to the organophosphate malathion in 100%. This study revealed that resistance to insecticides is frequent in Ecuador, due to the pressure of the use of insecticides for that control, so its reliable and precise use is recommended. It is a valuable contribution to the development of successful vector control strategies when implementing interventions that involve the use of the chemical tool to combat disease vectors in Ecuador.