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Relationship between Climate Variables and Dengue Incidence in Argentina
BACKGROUND: Climate change is an important driver of the increased spread of dengue from tropical and subtropical regions to temperate areas around the world. Climate variables such as temperature and precipitation influence the dengue vector’s biology, physiology, abundance, and life cycle. Thus, a...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Environmental Health Perspectives
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10208431/ https://www.ncbi.nlm.nih.gov/pubmed/37224070 http://dx.doi.org/10.1289/EHP11616 |
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author | López, María S. Gómez, Andre A. Müller, Gabriela V. Walker, Elisabet Robert, Michael A. Estallo, Elizabet L. |
author_facet | López, María S. Gómez, Andre A. Müller, Gabriela V. Walker, Elisabet Robert, Michael A. Estallo, Elizabet L. |
author_sort | López, María S. |
collection | PubMed |
description | BACKGROUND: Climate change is an important driver of the increased spread of dengue from tropical and subtropical regions to temperate areas around the world. Climate variables such as temperature and precipitation influence the dengue vector’s biology, physiology, abundance, and life cycle. Thus, an analysis is needed of changes in climate change and their possible relationships with dengue incidence and the growing occurrence of epidemics recorded in recent decades. OBJECTIVES: This study aimed to assess the increasing incidence of dengue driven by climate change at the southern limits of dengue virus transmission in South America. METHODS: We analyzed the evolution of climatological, epidemiological, and biological variables by comparing a period of time without the presence of dengue cases (1976–1997) to a more recent period of time in which dengue cases and important outbreaks occurred (1998–2020). In our analysis, we consider climate variables associated with temperature and precipitation, epidemiological variables such as the number of reported dengue cases and incidence of dengue, and biological variables such as the optimal temperature ranges for transmission of dengue vector. RESULTS: The presence of dengue cases and epidemic outbreaks are observed to be consistent with positive trends in temperature and anomalies from long-term means. Dengue cases do not seem to be associated with precipitation trends and anomalies. The number of days with optimal temperatures for dengue transmission increased from the period without dengue cases to the period with occurrences of dengue cases. The number of months with optimal transmission temperatures also increased between periods but to a lesser extent. CONCLUSIONS: The higher incidence of dengue virus and its expansion to different regions of Argentina seem to be associated with temperature increases in the country during the past two decades. The active surveillance of both the vector and associated arboviruses, together with continued meteorological data collection, will facilitate the assessment and prediction of future epidemics that use trends in the accelerated changes in climate. Such surveillance should go hand in hand with efforts to improve the understanding of the mechanisms driving the geographic expansion of dengue and other arboviruses beyond the current limits. https://doi.org/10.1289/EHP11616 |
format | Online Article Text |
id | pubmed-10208431 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Environmental Health Perspectives |
record_format | MEDLINE/PubMed |
spelling | pubmed-102084312023-05-25 Relationship between Climate Variables and Dengue Incidence in Argentina López, María S. Gómez, Andre A. Müller, Gabriela V. Walker, Elisabet Robert, Michael A. Estallo, Elizabet L. Environ Health Perspect Research BACKGROUND: Climate change is an important driver of the increased spread of dengue from tropical and subtropical regions to temperate areas around the world. Climate variables such as temperature and precipitation influence the dengue vector’s biology, physiology, abundance, and life cycle. Thus, an analysis is needed of changes in climate change and their possible relationships with dengue incidence and the growing occurrence of epidemics recorded in recent decades. OBJECTIVES: This study aimed to assess the increasing incidence of dengue driven by climate change at the southern limits of dengue virus transmission in South America. METHODS: We analyzed the evolution of climatological, epidemiological, and biological variables by comparing a period of time without the presence of dengue cases (1976–1997) to a more recent period of time in which dengue cases and important outbreaks occurred (1998–2020). In our analysis, we consider climate variables associated with temperature and precipitation, epidemiological variables such as the number of reported dengue cases and incidence of dengue, and biological variables such as the optimal temperature ranges for transmission of dengue vector. RESULTS: The presence of dengue cases and epidemic outbreaks are observed to be consistent with positive trends in temperature and anomalies from long-term means. Dengue cases do not seem to be associated with precipitation trends and anomalies. The number of days with optimal temperatures for dengue transmission increased from the period without dengue cases to the period with occurrences of dengue cases. The number of months with optimal transmission temperatures also increased between periods but to a lesser extent. CONCLUSIONS: The higher incidence of dengue virus and its expansion to different regions of Argentina seem to be associated with temperature increases in the country during the past two decades. The active surveillance of both the vector and associated arboviruses, together with continued meteorological data collection, will facilitate the assessment and prediction of future epidemics that use trends in the accelerated changes in climate. Such surveillance should go hand in hand with efforts to improve the understanding of the mechanisms driving the geographic expansion of dengue and other arboviruses beyond the current limits. https://doi.org/10.1289/EHP11616 Environmental Health Perspectives 2023-05-24 /pmc/articles/PMC10208431/ /pubmed/37224070 http://dx.doi.org/10.1289/EHP11616 Text en https://ehp.niehs.nih.gov/about-ehp/licenseEHP is an open-access journal published with support from the National Institute of Environmental Health Sciences, National Institutes of Health. All content is public domain unless otherwise noted. |
spellingShingle | Research López, María S. Gómez, Andre A. Müller, Gabriela V. Walker, Elisabet Robert, Michael A. Estallo, Elizabet L. Relationship between Climate Variables and Dengue Incidence in Argentina |
title | Relationship between Climate Variables and Dengue Incidence in Argentina |
title_full | Relationship between Climate Variables and Dengue Incidence in Argentina |
title_fullStr | Relationship between Climate Variables and Dengue Incidence in Argentina |
title_full_unstemmed | Relationship between Climate Variables and Dengue Incidence in Argentina |
title_short | Relationship between Climate Variables and Dengue Incidence in Argentina |
title_sort | relationship between climate variables and dengue incidence in argentina |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10208431/ https://www.ncbi.nlm.nih.gov/pubmed/37224070 http://dx.doi.org/10.1289/EHP11616 |
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