Survey of container breeding mosquito larvae (Dengue vector) in Salvapan and Las Flores

ABSTRACT

Dengue is one of the most important vector borne diseases, with millions of cases occurring yearly and with billions found in risk areas. Eliminating water-holding containers where mosquitoes oviposit and develop can help manage urban disease-vector mosquitos. Thus, a water holding container eradication campaign was implemented by the Ministry of Health of Belize to eliminate the outburst of a dengue epidemic in known risk areas. A study was conducted in two selected communities, Salvapan and Las Flores, to determine the preferred container breeding habitat of the dengue vector and which of the site is more susceptible to a dengue epidemic. A number of households per site were randomly selected and a survey was carried out to identify water-holding containers breeding mosquito larvae and to identify the dengue vectors Aedes aegypti and Aedes albopictus. Mosquito larvae from different types of artificial and natural containers were collected and were identified using taxonomical keys. Aedes aegypti was the most abundant species in 74% of positive containers (water tanks, buckets, waste tire, etc). Culex spp. with 13%, Aedes albopictus with 12%, and Anopheles spp. with 0.48% in positive containers. The most abundant positive container was the bucket with 31% out of all positive containers. Twenty-six percent of the houses in Salvapan were positive compared to the thirty-seven percent in Las Flores. The study concluded that the dengue vector preferred breeding habitat was the bucket and that Las Flores is more prone to a dengue epidemic than Salvapan.(AU)