A decade of arbovirus emergence in the temperate southern cone of South America: dengue, Aedes aegypti and climate dynamics in Córdoba, Argentina
Background: Argentina is located at the southern temperate range of arboviral transmission by the mosquito Aedes aegypti and has experienced a rapid increase in disease transmission in recent years. Here we present findings from an entomological surveillance study that began in Córdoba, Argentina, f...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-09-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844020317011 |
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| author | Elizabet L. Estallo Rachel Sippy Anna M. Stewart-Ibarra Marta G. Grech Elisabet M. Benitez Francisco F. Ludueña-Almeida Mariela Ainete María Frias-Cespedes Michael Robert Moory M. Romero Walter R. Almirón |
| author_facet | Elizabet L. Estallo Rachel Sippy Anna M. Stewart-Ibarra Marta G. Grech Elisabet M. Benitez Francisco F. Ludueña-Almeida Mariela Ainete María Frias-Cespedes Michael Robert Moory M. Romero Walter R. Almirón |
| author_sort | Elizabet L. Estallo |
| collection | DOAJ |
| description | Background: Argentina is located at the southern temperate range of arboviral transmission by the mosquito Aedes aegypti and has experienced a rapid increase in disease transmission in recent years. Here we present findings from an entomological surveillance study that began in Córdoba, Argentina, following the emergence of dengue in 2009. Methods: From 2009 to 2017, larval surveys were conducted monthly, from November to May, in 600 randomly selected households distributed across the city. From 2009 to 2013, ovitraps (n = 177) were sampled weekly to monitor the oviposition activity of Ae. aegypti. We explored seasonal and interannual dynamics of entomological variables and dengue transmission. Cross correlation analysis was used to identify significant lag periods. Results: Aedes aegypti were detected over the entire study period, and abundance peaked during the summer months (January to March). We identified a considerable increase in the proportion of homes with juvenile Ae. aegypti over the study period (from 5.7% of homes in 2009–10 to 15.4% of homes in 2016–17). Aedes aegypti eggs per ovitrap and larval abundance were positively associated with temperature in the same month. Autochthonous dengue transmission peaked in April, following a peak in imported dengue cases in March; autochthonous dengue was not positively associated with vector or climate variables. Conclusions: This longitudinal study provides insights into the complex dynamics of arbovirus transmission and vector populations in a temperate region of arbovirus emergence. Our findings suggest that Córdoba is well suited for arbovirus disease transmission, given the stable and abundant vector populations. Further studies are needed to better understand the role of regional human movement. |
| first_indexed | 2024-12-12T15:23:52Z |
| format | Article |
| id | doaj.art-066f18bcb2c74cf9bc2d3ffcf05f3157 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-12-12T15:23:52Z |
| publishDate | 2020-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-066f18bcb2c74cf9bc2d3ffcf05f31572022-12-22T00:20:18ZengElsevierHeliyon2405-84402020-09-0169e04858A decade of arbovirus emergence in the temperate southern cone of South America: dengue, Aedes aegypti and climate dynamics in Córdoba, ArgentinaElizabet L. Estallo0Rachel Sippy1Anna M. Stewart-Ibarra2Marta G. Grech3Elisabet M. Benitez4Francisco F. Ludueña-Almeida5Mariela Ainete6María Frias-Cespedes7Michael Robert8Moory M. Romero9Walter R. Almirón10Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET- Universidad Nacional de Córdoba, Centro de Investigaciones Entomológicas de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba Capital, Córdoba, Argentina; Corresponding author.Institute for Global Health & Translational Sciences, SUNY Upstate Medical University, Syracuse, NY, USA; Department of Geography, University of Florida, Gainesville, FL, USAInstitute for Global Health & Translational Sciences, SUNY Upstate Medical University, Syracuse, NY, USA; InterAmerican Institute for Global Change Research (IAI), Montevideo, Department of Montevideo, UruguayCentro de Investigación Esquel de Montaña y Estepa Patagónica (CIEMEP), CONICET and Universidad Nacional de la Patagonia San Juan Bosco, Facultad de Ciencias Naturales y Ciencias de la Salud, Sede Esquel, Esquel, Chubut, ArgentinaInstituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET- Universidad Nacional de Córdoba, Centro de Investigaciones Entomológicas de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba Capital, Córdoba, ArgentinaInstituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET- Universidad Nacional de Córdoba, Centro de Investigaciones Entomológicas de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba Capital, Córdoba, Argentina; Cátedra de Matemática (Cs. Biológicas), Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba Capital, Córdoba, ArgentinaMinisterio de Salud de la Provincia de Córdoba- Dirección de Epidemiología, Hospital San Roque Viejo, Córdoba Capital, Córdoba, ArgentinaMinisterio de Salud de la Provincia de Córdoba- Dirección de Epidemiología, Hospital San Roque Viejo, Córdoba Capital, Córdoba, ArgentinaDepartment of Mathematics, Statistics, and Physics, University of the Sciences, Philadelphia, PA, USA; Department of Mathematics and Applied Mathematics, Virginia Commonwealth University, Richmond, VA, USAInstitute for Global Health & Translational Sciences, SUNY Upstate Medical University, Syracuse, NY, USA; Department of Environmental Studies, State University of New York College of Environmental Science and Forestry (SUNY ESF), Syracuse, NY, USAInstituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET- Universidad Nacional de Córdoba, Centro de Investigaciones Entomológicas de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba Capital, Córdoba, ArgentinaBackground: Argentina is located at the southern temperate range of arboviral transmission by the mosquito Aedes aegypti and has experienced a rapid increase in disease transmission in recent years. Here we present findings from an entomological surveillance study that began in Córdoba, Argentina, following the emergence of dengue in 2009. Methods: From 2009 to 2017, larval surveys were conducted monthly, from November to May, in 600 randomly selected households distributed across the city. From 2009 to 2013, ovitraps (n = 177) were sampled weekly to monitor the oviposition activity of Ae. aegypti. We explored seasonal and interannual dynamics of entomological variables and dengue transmission. Cross correlation analysis was used to identify significant lag periods. Results: Aedes aegypti were detected over the entire study period, and abundance peaked during the summer months (January to March). We identified a considerable increase in the proportion of homes with juvenile Ae. aegypti over the study period (from 5.7% of homes in 2009–10 to 15.4% of homes in 2016–17). Aedes aegypti eggs per ovitrap and larval abundance were positively associated with temperature in the same month. Autochthonous dengue transmission peaked in April, following a peak in imported dengue cases in March; autochthonous dengue was not positively associated with vector or climate variables. Conclusions: This longitudinal study provides insights into the complex dynamics of arbovirus transmission and vector populations in a temperate region of arbovirus emergence. Our findings suggest that Córdoba is well suited for arbovirus disease transmission, given the stable and abundant vector populations. Further studies are needed to better understand the role of regional human movement.http://www.sciencedirect.com/science/article/pii/S2405844020317011Aedes aegyptiArgentinaDengueOvitrapLarval surveysSurveillance |
| spellingShingle | Elizabet L. Estallo Rachel Sippy Anna M. Stewart-Ibarra Marta G. Grech Elisabet M. Benitez Francisco F. Ludueña-Almeida Mariela Ainete María Frias-Cespedes Michael Robert Moory M. Romero Walter R. Almirón A decade of arbovirus emergence in the temperate southern cone of South America: dengue, Aedes aegypti and climate dynamics in Córdoba, Argentina Heliyon Aedes aegypti Argentina Dengue Ovitrap Larval surveys Surveillance |
| title | A decade of arbovirus emergence in the temperate southern cone of South America: dengue, Aedes aegypti and climate dynamics in Córdoba, Argentina |
| title_full | A decade of arbovirus emergence in the temperate southern cone of South America: dengue, Aedes aegypti and climate dynamics in Córdoba, Argentina |
| title_fullStr | A decade of arbovirus emergence in the temperate southern cone of South America: dengue, Aedes aegypti and climate dynamics in Córdoba, Argentina |
| title_full_unstemmed | A decade of arbovirus emergence in the temperate southern cone of South America: dengue, Aedes aegypti and climate dynamics in Córdoba, Argentina |
| title_short | A decade of arbovirus emergence in the temperate southern cone of South America: dengue, Aedes aegypti and climate dynamics in Córdoba, Argentina |
| title_sort | decade of arbovirus emergence in the temperate southern cone of south america dengue aedes aegypti and climate dynamics in cordoba argentina |
| topic | Aedes aegypti Argentina Dengue Ovitrap Larval surveys Surveillance |
| url | http://www.sciencedirect.com/science/article/pii/S2405844020317011 |
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