Distribution of insecticide susceptibility status of malaria and dengue vectors in the Philippines

Issue Date

10-2014

Abstract

The wide scale use of insecticide-based vector control strategies has led to concerns of development of resistance in malaria and dengue vectors. Insecticide susceptibility monitoring will allow early detection and province information for the development of measures against the emergence of vector population with strong resistance. Collection of malaria vectors was conducted in six sentinel sites (Agusan del Sur, Davao Oriental, Isabela, Kalinga, Occidental Mindoro, Palawan) which have regular insecticide susceptibility monitoring of mosquito populations since 2001, whereas sampling of dengue vectors was conducted in selected cities in Metro Manila. Female mosquito vectors were exposed to diagnostic doses of various insecticides for susceptibility tests following the standard WHO testing protocol. Aedes aegypti from three barangays in Mandaluyong City showed complete susceptibility to malathion but showed resistance to deltamethrin, etofenprox, permethrin, lambda-Cyhalothrin, cyfluthrin and DDT. Anopheles flavirostris is susceptible to all insecticide types except in Mindoro (89.33% mortality) indicating possible incipient resistance for lambda-Cyhalothrin that needs further investigation. Susceptibility to deltamethrin, etofenprox and permethrin was detected in An. maculatus from Occidental Mindoro, however, mortality rates for lambda-Cyhalothrin, cyfluthrin and DDT were between 85.78% and 94.76 percent, suggesting possible existence of resistance that needs re-evaluation.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

28

Issue

2

Page

219

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

AEDES AEGYPTI; ANOPHELES; LAMBDA-CYHALOTHRIN; INSECTICIDES; DISEASE RESISTANCE; MONITORING; PHILIPPINES

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