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Related Experiment Video

Updated: Jun 18, 2026

Preparing Irradiated and Marked Male Aedes aegypti Mosquitoes for Release in an Operational Sterile Insect Technique Program

Preparing Irradiated and Marked Male Aedes aegypti Mosquitoes for Release in an Operational Sterile Insect Technique Program

Published on: March 12, 2021

Progressive decrease in Aedes aegypti distribution in Reunion Island since the 1900s.

Leïla Bagny¹, Hélène Delatte, Serge Quilici

¹Cirad, UMR Peuplements Végétaux et Bio-agresseurs en Milieu Tropical CIRAD/Université de la Réunion, Pôle de Protection des Plantes, 7 chemin de l'IRAT, 97410, Saint-Pierre, La Réunion, France. leila.bagny@cirad.fr

Journal of Medical Entomology

|December 8, 2009

Summary

The domestic form of Aedes aegypti has significantly decreased in Reunion Island, now absent from artificial containers. This decline may be due to competition with Aedes albopictus and past vector control efforts.

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Vector Competence Analyses on Aedes aegypti Mosquitoes using Zika Virus

Vector Competence Analyses on Aedes aegypti Mosquitoes using Zika Virus

Published on: May 31, 2020

Related Experiment Videos

Last Updated: Jun 18, 2026

Preparing Irradiated and Marked Male Aedes aegypti Mosquitoes for Release in an Operational Sterile Insect Technique Program

Preparing Irradiated and Marked Male Aedes aegypti Mosquitoes for Release in an Operational Sterile Insect Technique Program

Published on: March 12, 2021

Vector Competence Analyses on Aedes aegypti Mosquitoes using Zika Virus

Vector Competence Analyses on Aedes aegypti Mosquitoes using Zika Virus

Published on: May 31, 2020

Area of Science:

Medical entomology
Ecology
Vector-borne disease epidemiology

Background:

The domestic form of Aedes aegypti (L.) in Reunion Island was historically restricted to natural habitats on the west coast.
Aedes aegypti co-occurs with Aedes albopictus, a common species and major arbovirus vector, in rock hole breeding sites.

Purpose of the Study:

To document and understand the changes in Aedes aegypti distribution on Reunion Island since the early 20th century.
To analyze the factors contributing to the observed decline in Aedes aegypti populations.

Main Methods:

Comparative analysis of Aedes aegypti distribution data from 1985–1986 and 2007–2008.
Review of previously published reports on Aedes aegypti distribution.
Ecological and historical data analysis to infer population dynamics.

Main Results:

A progressive decrease in the number of Aedes aegypti breeding sites and relative abundance was observed.
Aedes aegypti is no longer found in artificial containers on Reunion Island.
The species' distribution has become increasingly restricted over the past 50 years.

Conclusions:

Ecological factors, particularly competitive interactions between Aedes aegypti and Aedes albopictus, likely initiated the decline in the 1950s.
Vector control campaigns may have accelerated the decrease in Aedes aegypti populations.
The findings highlight shifts in mosquito vector populations and potential implications for arbovirus transmission.