Aedes Density or Vector-Host Contact (VHC) Ratios: Ecological Niche Modeling Approach in Understanding Spatio-Temporal Distribution of Aedes vectors in the City of New Orleans, LA, USA

Authors: Mohamed Sallam*, , Sarah Michaels, Medical Entomologist, Brandon Carter, Environmental specialist, Claudia Riegel, Director of Mosquito, Termite, and Rodent Control
Topics: Medical and Health Geography, Spatial Analysis & Modeling, Environmental Science
Keywords: Aedes; Zika; dengue; ecological modeling; physical systems
Session Type: Paper
Day: 4/12/2018
Start / End Time: 1:20 PM / 3:00 PM
Room: Bonaparte, Marriott, River Tower Elevators, 4th Floor
Presentation File: No File Uploaded


Asian tiger and yellow fever mosquitoes (Aedes albopictus and Ae. aegypti) are global nuisances and are competent vectors for viruses such as Chikungunya (CHIKV), Dengue (DV), and Zika (ZIKV). Few studies adopted a comprehensive system approach to model spatial-temporal distribution pattern of both Aedes vectors highlighting the interaction between environmental, socioeconomic, meteorological and topographic subsystems. In our study, we utilized two ecological niche modeling approaches encompassing density and vector-host contact ratios to predict the spatial-temporal distribution of Aedes vectors in response to the biophysical systems in the city of New Orleans, LA (NOLA). We used regression analysis to select the influential factors that significantly predicts both Aedes density and vector-host contact ratios. The selected influential factors were eventually used in generating risk maps by MaxEnt. We examined the reliability of both approaches in predicting areas under risk of increased biting rate within active flight range of Aedes vectors. A 30 m distribution risk maps were generated to improve routine mosquito surveillance and control activities in NOLA, especially during outbreaks. The magnitude of spatial-temporal distribution of both mosquito vectors and response to their predicting variables are discussed

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