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Visualizing the Global Distribution of Aedes aegypti and Ae. albopictus

on Sun, 07/26/2015 - 21:19

Introduction

Aedes aegypti and Aedes albopictus are vectors of globally important arboviruses, such as dengue, yellow fever, and chikungunya viruses.

Dengue is the most prevalent human arboviral infection causing approximately 100 million apparent annual infections and almost 3.9 billion people in about 128 countries are at risk of infection with dengue viruses, according to the World Health Organization (WHO). Chikungunya has caused over 2.5 million infections over the past decade and recently has been spreading in the Americas (where recently caused over 1 million infections) and emerging in Europe. The public health impact of dengue and chikungunya virus has increased dramatically over the last 50 years, with both diseases spreading to new geographic areas and increasing disease burden. 

Aedes aegypti is a predominantly urban and domestic vector, utilizing mainly artificial containers as larval sites and feeding almost exclusively on humans. Meanwhile, Aedes albopictus can more often be found in peri-urban and rural environments, feeding readily on a variety of mammalian (including humans) and avian species.

From the public health perspective, knowing and understanding the geographical distribution and presence of both vectors is important for planning disease prevention and control interventions

The global geographic dataset of occurrence of Ae. aegypti and Ae. albopictus.

The global compendium of Aedes aegypti and Ae. albopictus occurence database was recently published in the Nature's Scientific Data, an open-access, peer-reviewed publication for descriptions of scientifically valuable datasets. The study describe the sources and process to compiles the larger and most comprehensive global geographic database of known global occurrences of adults, pupae, larvae or eggs of Ae. aegypti and Ae. albopictus between 1960 and 2014.

This visualization has the purpose of facilitating the exploration of known location of unique occurrences of Aedes aegypti and Ae. albopictus worldwide. Dataset is avalible to download from here.

The dataset contains a total of 42,066 spatially unique occurrences for both Aedes species, having 19,929 records for Ae. aegypti (47% of total records) and 22,137 records for Ae. albopictus (53% of total records). This includes 7,485 records from peer-reviewed literature and 34,581 up-to date records from national entomological surveys from Brazil and Taiwan for both species.

This dataset is useful for: 

  1. a variety of mapping and spatial analyses of the vectors,
  2. investigate the spatial and temporal patterns of Aedes distribution at multiple scales,  
  3. identify areas of risk for transmission of dengue, yellow fever and chikungunya viruses,
  4. identify and apply effective disease prevention and control interventions al local and national levels 

References

WHO. Dengue and severe dengue. Fact sheet No. 117. Updated May 2015. Accessed July 25, 2015 http://www.who.int/mediacentre/factsheets/fs117/en/

WHO. Chikungunya. Fact sheet No. 327. Updated May 2015. Accessed July 25, 2015. http://www.who.int/mediacentre/factsheets/fs327/en/

Kraemer MU, Sinka ME, Duda KA, Mylne A, Shearer FM, Brady OJ, Messina JP, Barker CM, Moore CG, Carvalho RG, Coelho GE, Van Bortel W, Hendrickx G, Schaffner F, Wint GR, Elyazar IR, Teng HJ, Hay SI. The global compendium of Aedes aegypti and Ae. albopictus occurrence.Sci Data. 2015 Jul 7;2:150035. doi: 10.1038/sdata.2015.35. eCollection 2015.

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Comments

Jack's picture

Not realistic and a huge biased!

Vladimir's picture

It is the Best!

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