Use of ovitraps for the seasonal and spatial monitoring of Aedes spp. in an area endemic for arboviruses in Northeast Brazil

  • João Victor Oliveira Noleto Federal Institute of Education, Science and Technology of Maranhão, Department of Education, São Raimundo das Mangabeiras, Brazil
  • Hevilem Letícia Moura do Nascimento Moraes Federal Institute of Education, Science and Technology of Maranhão, Department of Education, São Raimundo das Mangabeiras, Brazil
  • Tamires de Moura Lima Federal Institute of Education, Science and Technology of Maranhão, Department of Education, São Raimundo das Mangabeiras, Brazil
  • João Gustavo Mendes Rodrigues Federal University of Minas Gerais, Departament of Parasitology, Institute of Biological Sciences, Belo Horizonte, Brazil
  • Diogo Tavares Cardoso Federal University of Minas Gerais, Departament of Parasitology, Institute of Biological Sciences, Belo Horizonte, Brazil
  • Kalyl Chaves Lima Municipal Secretary of Health, São Raimundo das Mangabeiras, Brazil
  • Richardson Soares de Souza Melo Federal Institute of Education, Science and Technology of Maranhão, Department of Education, São Raimundo das Mangabeiras, Brazil
  • Guilherme Silva Miranda Federal Institute of Education, Science and Technology of Maranhão, Department of Education, São Raimundo das Mangabeiras, Brazil
Keywords: Traps, Arboviruses, Mosquitoes, Vectors

Abstract

Introduction: Due to recent outbreaks of Dengue and Chikungunya and an absence of effective monitoring of the mosquito Aedes spp. in the municipality of São Raimundo das Mangabeiras, State of Maranhão, we aimed to demonstrate the potential of ovitraps used together with mathematical models and geotechnology to improve control of this mosquito.

Methodology: From January to December of 2017, ovitraps were set up in five different neighborhoods (Centro, Vila Cardoso, Nazaré, São José e São Francisco). Positivity indices were calculated for each ovitraps, besides the egg density and average number of eggs. Some of the eggs were used for species identification. Mathematical models of correlation and logistic regression were used to evaluate the influence of abiotic factors on egg distribution during each month. Spatial analysis was carried out using georeferencing.

Results: A total of 4,453 eggs were counted, with A. aegypti and A. albopictus present in each month and neighborhood. The mathematical models show that rainfall can result in a significant increase in the number of eggs. Entomological calculation indicates that there is a high risk of dissemination of arboviruses in the area. Spatially, it was possible to indicate sites with the largest number of collected eggs, which may facilitate future interventions.

Conclusions: As such, ovitraps have proven to be an effective and low cost method for the monitoring of Aedes spp., and that its use may help in arboviruses prevention campaigns.

Published
2020-04-30
How to Cite
1.
Oliveira Noleto JV, Moura do Nascimento Moraes HL, de Moura Lima T, Mendes Rodrigues JG, Tavares Cardoso D, Chaves Lima K, Soares de Souza Melo R, Miranda GS (2020) Use of ovitraps for the seasonal and spatial monitoring of Aedes spp. in an area endemic for arboviruses in Northeast Brazil. J Infect Dev Ctries 14:387-393. doi: 10.3855/jidc.12245
Section
Original Articles