Monitoring the density of Aedes aegypti (Diptera: Culicidae) through ovitrap in the urban area of Manaus – Amazonas, Brazil

Abstract

Objective: To compare two monitoring methods, oviposition traps and Aedes aegypti Infestation Index Rapid Survey (LiRAa), aiming to analyze which method is more effective for estimating A. aegypti population density. Methods: Comparative study between LiRAa and population density obtained through 600 oviposition traps from August to September 2021 in the municipality of Manaus/AM. Results: 12.211 Aedes eggs were collected. Of these, (12.96%) in the North health district, followed by the East (23.16%), South (28.44%) and West (35.44%) districts. A difference was identified only between the North and West districts (p < 0.05). When analyzing LiRAa in the four health districts, 3.401 homes were inspected. Of these, (42.99%) in the West Zone, followed by the East Zone (38.25%), North (12.73%) and South (6.03%). When checking the Breteau Index, the unpaired t test did not identify a statistical difference in the level of infestation of immature Aedes. Conclusion: Oviposition traps and LiRAa are important tools for monitoring the infestation of mosquitoes of the genus Aedes. However, ovitraps can provide more accurate data on vector dispersal, which allows greater agility in controlling A. aegypti, the main transmitter of arboviruses in the country.