Models for Predicting Aedes aegypti Larval Indices Based on Satellite Images and Climatic Variables

Estallo, Elizabet Lilia; Lamfri, Mario; Scavuzzo, Carlos Marcelo; Almeida, Francisco Ludueña; Introini, María Virginia; Zaidenberg, Mario; Almirón, Walter Ricardo

doi:10.2987/5705.1

Cited by 53 publications

(64 citation statements)

References 21 publications

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“…EVI measures vegetation canopy greenness and can be used as a proxy for soil surface-level moisture that are associated with the presence of vector larval development sites [25]. We used range and mean values of MODIS EVI after processing through a gap-filling algorithm described in Weiss et al [23] (Figure 1e and f).…”

Section: Methodsmentioning

confidence: 99%

Global distribution and environmental suitability for chikungunya virus, 1952 to 2015

et al. 2016

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Chikungunya fever is an acute febrile illness caused by the chikungunya virus (CHIKV), which is transmitted to humans by Aedes mosquitoes. Although chikungunya fever is rarely fatal, patients can experience debilitating symptoms that last from months to years. Here we comprehensively assess the global distribution of chikungunya and produce high-resolution maps, using an established modelling framework that combines a comprehensive occurrence database with bespoke environmental correlates, including up-to-date Aedes distribution maps. This enables estimation of the current total population-at-risk of CHIKV transmission and identification of areas where the virus may spread to in the future. We identified 94 countries with good evidence for current CHIKV presence and a set of countries in the New and Old World with potential for future CHIKV establishment, demonstrated by high environmental suitability for transmission and in some cases previous sporadic reports. Aedes aegypti presence was identified as one of the major contributing factors to CHIKV transmission but significant geographical heterogeneity exists. We estimated 1.3 billion people are living in areas at-risk of CHIKV transmission. These maps provide a baseline for identifying areas where prevention and control efforts should be prioritised and can be used to guide estimation of the global burden of CHIKV.

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Section: Methodsmentioning

confidence: 99%

Global distribution and environmental suitability for chikungunya virus, 1952 to 2015

et al. 2016

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“…Remote sensing has been used to map landscape features such as tidiness and shade levels of backyards as predictors of suitable Ae. aegypti breeding habitats (Tun-Lin et al 1995;Moloney et al 1998) and to map environmental conditions, temperature, and precipitation, using NDVI as a proxy for precipitation (Estallo et al 2008). Remote sensing has also been used to map dengue transmission risk by mapping land use change in Thailand (Vanwambeke et al 2007) and landscape structure in Hawaii (Vanwambeke et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Co-occurrence Patterns of the Dengue Vector Aedes aegypti and Aedes mediovitattus, a Dengue Competent Mosquito in Puerto Rico

et al. 2011

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Aedes aegypti is implicated in dengue transmission in tropical and subtropical urban areas around the world. Ae. aegypti populations are controlled through integrative vector management. However, the efficacy of vector control may be undermined by the presence of alternative, competent species. In Puerto Rico, a native mosquito, Ae. mediovittatus, is a competent dengue vector in laboratory settings and spatially overlaps with Ae. aegypti. It has been proposed that Ae. mediovittatus may act as a dengue reservoir during inter-epidemic periods, perpetuating endemic dengue transmission in rural Puerto Rico. Dengue transmission dynamics may therefore be influenced by the spatial overlap of Ae. mediovittatus, Ae. aegypti, dengue viruses, and humans. We take a landscape epidemiology approach to examine the association between landscape composition and configuration and the distribution of each of these Aedes species and their cooccurrence. We used remotely sensed imagery from a newly launched satellite to map landscape features at very high spatial resolution. We found that the distribution of Ae. aegypti is positively predicted by urban density and by the number of tree patches, Ae. mediovittatus is positively predicted by the number of tree patches, but negatively predicted by large contiguous urban areas, and both species are predicted by urban density and the number of tree patches. This analysis provides evidence that landscape composition and configuration is a surrogate for mosquito community composition, and suggests that mapping landscape structure can be used to inform vector control efforts as well as to inform urban planning.

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“…Entomological surveillance is essential to determine its abundance through the year and allow estimation of the intensity of the control required in affected areas (Ibañez-Bernal and Gómez-Dantes 1995, Ooi et al 2006, Eiras and Carvallio 2009. Larval stages of the mosquito have been used as entomological indices which include house index, container index, and Breteau index, which are complementary values (Focks 2003, Abdalmagid and Alhusein 2008, Estallo et al 2008.…”

Section: Introductionmentioning

confidence: 99%

Entomological Indicators to Assess LarvalAedes aegypti¹(Linnaeus, 1762) Control in Baja California Sur, México

Tovar-Zamora¹,

Ramos-Rodríguez

Galván

et al. 2015

Southwestern Entomologist

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Models for Predicting Aedes aegypti Larval Indices Based on Satellite Images and Climatic Variables

Cited by 53 publications

References 21 publications

Global distribution and environmental suitability for chikungunya virus, 1952 to 2015

Global distribution and environmental suitability for chikungunya virus, 1952 to 2015

Co-occurrence Patterns of the Dengue Vector Aedes aegypti and Aedes mediovitattus, a Dengue Competent Mosquito in Puerto Rico

Entomological Indicators to Assess LarvalAedes aegypti¹(Linnaeus, 1762) Control in Baja California Sur, México

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Models for Predicting Aedes aegypti Larval Indices Based on Satellite Images and Climatic Variables

Cited by 53 publications

References 21 publications

Global distribution and environmental suitability for chikungunya virus, 1952 to 2015

Global distribution and environmental suitability for chikungunya virus, 1952 to 2015

Co-occurrence Patterns of the Dengue Vector Aedes aegypti and Aedes mediovitattus, a Dengue Competent Mosquito in Puerto Rico

Entomological Indicators to Assess LarvalAedes aegypti1(Linnaeus, 1762) Control in Baja California Sur, México

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Entomological Indicators to Assess LarvalAedes aegypti¹(Linnaeus, 1762) Control in Baja California Sur, México