Socio-Ecological Factors Associated with Dengue Risk and Aedes aegypti Presence in the Galápagos Islands, Ecuador

Sadie J. Ryan, Catherine A. Lippi, Ryan Nightingale, Gabriela Hamerlinck, Mercy J. Borbor-Cordova, Marilyn Cruz B, Fernando Ortega, Renato Leon, Egan Waggoner and Anna M. Stewart-Ibarra
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Sadie J. Ryan: Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography and Emerging Pathogens Institute, University of Florida, Gainesville, FL 32601, USA
Catherine A. Lippi: Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography and Emerging Pathogens Institute, University of Florida, Gainesville, FL 32601, USA
Ryan Nightingale: Institute for Global Health and Translational Sciences, SUNY Upstate Medical University, Syracuse, NY 13210, USA
Gabriela Hamerlinck: Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography and Emerging Pathogens Institute, University of Florida, Gainesville, FL 32601, USA
Mercy J. Borbor-Cordova: Escuela Superior Politecnica del Litoral (ESPOL), Facultad de Ingenieria Maritima y Ciencias del Mar, Guayaquil 090150, Ecuador
Marilyn Cruz B: La Agencia de Regulación y Control de la Bioseguridad y Cuarentena para Galápagos (ABG), Puerto Ayora, Galápagos 200350, Ecuador
Fernando Ortega: School of Public Health, Universidad San Francisco de Quito, Quito 170901, Ecuador
Renato Leon: Laboratorio de Entomología Médica & Medicina Tropical, LEMMT, Universidad San Francisco de Quito, Quito 170901, Ecuador
Egan Waggoner: Institute for Global Health and Translational Sciences, SUNY Upstate Medical University, Syracuse, NY 13210, USA
Anna M. Stewart-Ibarra: Institute for Global Health and Translational Sciences, SUNY Upstate Medical University, Syracuse, NY 13210, USA

IJERPH, 2019, vol. 16, issue 5, 1-16

Abstract: Dengue fever is an emerging infectious disease in the Galápagos Islands of Ecuador, with the first cases reported in 2002 and subsequent periodic outbreaks. We report results of a 2014 pilot study conducted in Puerto Ayora (PA) on Santa Cruz Island, and Puerto Baquerizo Moreno (PB) on San Cristobal Island. To assess the socio-ecological risk factors associated with dengue and mosquito vector presence at the household level, we conducted 100 household surveys (50 on each island) in neighborhoods with prior reported dengue cases. Adult mosquitoes were collected inside and outside the home, larval indices were determined through container surveys, and heads of households were interviewed to determine demographics, self-reported prior dengue infections, housing conditions, and knowledge, attitudes, and practices regarding dengue. Multi-model selection methods were used to derive best-fit generalized linear regression models of prior dengue infection, and Aedes aegypti presence. We found that 24% of PB and 14% of PA respondents self-reported a prior dengue infection, and more PB homes than PA homes had Ae. aegypti . The top-ranked model for prior dengue infection included several factors related to human movement, household demographics, access to water quality issues, and dengue awareness. The top-ranked model for Ae. aegypti presence included housing conditions, mosquito control practices, and dengue risk perception. This is the first study of dengue risk and Ae. aegypti presence in the Galápagos Islands.

Keywords: dengue fever; Aedes aegypti; social-ecological risk; islands; Galápagos; Ecuador (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
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