Evaluation on the Bioefficacy of Permanet® 2.0, a Long Lasting Net Against Anopheles Stephensi Publisher



Bagheri A¹ ; Vatandoost H^{1, 2} ; Shayeghi M¹ ; Abai MR¹ ; Raeisi A³ ; Godwin NG¹ ; Akbari M¹ ; Sheikhi S¹ Show Affiliations
Source: Asian Pacific Journal of Tropical Disease Published:2017

Abstract

Objective: To evaluate the bioefficacy of PermaNet® 2.0 as long lasting net against main malaria vector, Anopheles stephensi (An. stephensi). Methods: In order to determine the persistence of PermaNet® 2.0, the cone bioassay tests were conducted on nine pieces of the nets which underwent nine different washing regimes. The washing procedure and bioassay tests were carried out according to the World Health Organization recommended methods. Results: The mortality rate of An. stephensi on net underwent nine washing regimes (1-25 times) resulted 22%, to 1%, as well as the knockdown rate were 74% to 2%, respectively. Conclusions: The mortality rate of An. stephensi exposed to long-lasting PermaNet® 2.0 showed an increasing trend following exposure to washed nets from 1-8. This phenomenon indicated a slow release of deltamethrin from inside of the net fibers to the surface which led to increased efficacy of the long-lasting PermaNet® 2.0. In the control group, no mortality occurred in cone bioassay tests. © 2017 by the Asian Pacific Journal of Tropical Disease.