“…aegypti larvae) is considered the most effective way of reducing and controlling the mosquito populations (Gubler 1998 In subtropical countries such as Brazil, mosquito population density, dengue transmission, and the number of DF cases start to increase at the beginning of the rainy season (October), with dengue cases peaking more than three months later (Coutinho et al 2006, Forattini et al 1995. In Brazil, dengue fever re-emerged as a major urban epidemic in 1986 (Marques et al 1993) and currently is considered the most important arthropod-borne viral disease (MS 2007a,b Transmission of dengue depends on a variety of variables in the relation between virus, mosquito vector and human host (Focks et al 1995, Kuno 1997. In the assessment of dengue risk, important factors are the level of herd immunity in the human population and the ratio of mosquito to human density, which influences the probability of vector-host contacts.…”