Sweeping method to scan breeding places for dengue and urban yellow fever vectors [Método de varredura para exame de criadouros de vetores de dengue e febre amarela urbana]

Abstract

To estimate the minimum numbers of "sweepings" for a representative sampling of larvae in a large container. 200 larvae in 4th stage were added in an 80-liter drum to carry out the experiment, in each retort was made 10 sweepings using a plastic sieve. Two hundred larvae in stage 4 were added to an 80-liter-drum and using a plastic sieve 10 sweepings were carried out in each experiment replicate. The results showed that 8 sweepings were enough to collect up to 72% of the total sample in the container. i. e., an average of 143±1.97. The proposed method proved to be easily and effectively implemented and allowed for the inspection of containers with large water volumes. These findings reinforce its use as an important potential tool in the routine vectorial surveillance of control programs of dengue and yellow fever.