2019
DOI: 10.2987/19-6831.1
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Resistance Status of Aedes aegypti to Deltamethrin, Malathion, and Temephos in Ecuador

Abstract: In Ecuador, the status of insecticide resistance for Aedes aegypti, the principal arboviral vector in the country, has not been previously evaluated. The aim of this research was to describe the resistance status of Ae. aegypti to the principal insecticides used for vector control in provinces with high reports of arboviral clinical cases. This was a descriptive study performed on Ae. aegypti collected from 2016 to 2017 in 14 localities of Ecuador. The larvae were reared and tested using bioassays applying the… Show more

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Cited by 29 publications
(27 citation statements)
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“…This is compounded by its poor adsorption in the clay type of soil in the zone Cienega, thereby contributing to its high levels in aqueous surfaces (Kulluru et al 2010;IIEG 2018). Analysis of various reports in the literature on the concentrations of malathion in surface water and runoff shows that the highest levels in water were reported in the Ayuquila-Armería River in the states of Jalisco-Colima, Mexico (average: 500120 ppb), a value that is very close to that reported in drainage waters in Damietta, Egypt, with a range of 71.9 to 466 ppb (Burgos-Hernández et al 2006;Morales et al 2019;Rodríguez-Aguilar et al 2019;Abdel-Halim et al 2006;Anderson et al 2018;Sankararamakrishnan et al 2005;Mekonen et al 2016;Derbalah et al 2019). In this study, the results obtained in the Cienega region are disturbing.…”
Section: Concentrations Of Malathionmentioning
confidence: 58%
“…This is compounded by its poor adsorption in the clay type of soil in the zone Cienega, thereby contributing to its high levels in aqueous surfaces (Kulluru et al 2010;IIEG 2018). Analysis of various reports in the literature on the concentrations of malathion in surface water and runoff shows that the highest levels in water were reported in the Ayuquila-Armería River in the states of Jalisco-Colima, Mexico (average: 500120 ppb), a value that is very close to that reported in drainage waters in Damietta, Egypt, with a range of 71.9 to 466 ppb (Burgos-Hernández et al 2006;Morales et al 2019;Rodríguez-Aguilar et al 2019;Abdel-Halim et al 2006;Anderson et al 2018;Sankararamakrishnan et al 2005;Mekonen et al 2016;Derbalah et al 2019). In this study, the results obtained in the Cienega region are disturbing.…”
Section: Concentrations Of Malathionmentioning
confidence: 58%
“…It may also be a selection pressure that may be favoring the spread of only the two haplotypes detected. In Ecuador, the mosquito has been subjected to selection pressure by intensive and extensive adult (malathion and deltamethrin) and immature (temephos) insecticide use (Morales et al 2019), that may cause bottleneck selection and consequently low genetic variability. Random amplified polymorphic DNA (RAPD) analysis of Brazilian Ae.…”
Section: Discussionmentioning
confidence: 99%
“…These vector control efforts were self-reported by the household member for previous weeks up to a month. Adult mosquito fumigation refers to the spraying of deltamethrin, an insecticide that is applied inside the house every four months [10]. The Ministry of Health decided upon which houses to fumigate based on historical locations of high numbers of dengue cases.…”
Section: Methodsmentioning
confidence: 99%
“…The Ministry of Health decided upon which houses to fumigate based on historical locations of high numbers of dengue cases. Abate, the commercial name for temephos, is an organophosphate larvicide which is applied following World Health Organization (WHO) guidelines of 20g of granular product per 189 liters [10]. This product is applied to water containers 3 to 4 times a year [10], and is commonly used as a dengue vector control method [11].…”
Section: Methodsmentioning
confidence: 99%