1. Department of Entomology, Faculty of Agriculture; Kasetsart University; Bangkok 10900 Thailand
2. Department of Mathematical Sciences and Technology; Norwegian University of Life Sciences; Ås Norway
3. Institute de Recherche pour le Développement (IRD); Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (IRD 224-CNRS 5290 UM1-UM2); Montpellier Cedex 5 France
4. Bureau of Vector-borne Disease, Department of Disease control; Ministry of Public Health; Nonthaburi Thailand