Mosquito Control Technique Enters New Phase in Reunion
Mosquito Control Technique Enters New Phase in reunion Island
Reunion Island braces for a wider deployment of a groundbreaking mosquito control technique aimed at curbing the spread of dengue adn chikungunya.
the technique, known as the Sterile Insect Technique (SIT), involves releasing large numbers of sterile male mosquitoes into the environment. These males mate with wild females,but the eggs they produce are infertile,leading to a reduction in the mosquito population.
Thierry Baldet, a research director at CIRAD, a leading agricultural research center, confirmed that the SIT program will enter a new, larger-scale phase in early 2025. This phase, dubbed OPTIS (Operationalization of the SIT), will demonstrate the effectiveness of the approach on a broader scale.
From Small-Scale Success to island-Wide Deployment
Starting in late January 2025, 200 hectares of an urban area in Saint-Joseph, a commune in southern Reunion Island, will be targeted for SIT implementation. The program will utilize both irradiated and biocide-treated sterile male mosquitoes, followed by solely irradiated males, over a two-year period.
This expansion builds on the success of a smaller-scale pilot project conducted in Vincendo, a neighborhood in Saint-Joseph, in 2021. During that trial, 60,000 sterile mosquitoes were released, resulting in an 88% reduction in the mosquito population by July 2021.
Addressing a Growing Health Threat
The SIT program comes at a crucial time for Reunion Island, which is currently experiencing a resurgence of chikungunya cases. As of December 2,2024,26 locally acquired cases have been confirmed as August 23rd. Dengue fever also continues to circulate at low levels, with 22 cases reported since the end of August, primarily in the south.
A Multi-Faceted Approach
The OPTIS project will include comprehensive studies to assess the impact of SIT on target and non-target insect populations, and also its effects on dengue transmission and public acceptance. A communication strategy will be implemented in collaboration with the local municipality to inform and engage the community.
Long-Term Vision for Sustainable Mosquito Control
The ultimate goal of the OPTIS project is to establish the scientific foundation for a local start-up that will operationalize the enhanced SIT from the third year onwards. This initiative will not only benefit Reunion Island but also pave the way for the wider adoption of SIT in the Indian Ocean region.
The success of this expanded SIT program holds significant promise for Reunion Island’s fight against mosquito-borne diseases, offering a sustainable and environmentally friendly approach to protecting public health.
Reunion Island Targets Mosquitoes with Expanded Sterile Insect Technique
Reunion Island is preparing for a major expansion of a groundbreaking mosquito control program aimed at tackling dengue and chikungunya.
The Sterile Insect Technique (SIT), which involves releasing sterile male mosquitoes to prevent reproduction, will be implemented on a larger scale starting in January 2025. Known as the OPTIS (Operationalization of the SIT) project, this new phase will target a 200-hectare area in Saint-Joseph, following a accomplished pilot project in the neighborhood of Vincendo in 2021.
The pilot project, which released 60,000 sterile mosquitoes, resulted in an 88% reduction in the mosquito population by July 2021. The OPTIS project will utilize both irradiated and biocide-treated sterile males initially, eventually transitioning to solely irradiated males over a two-year period.
This expansion comes at a critical time as Reunion Island experiences a resurgence of chikungunya cases, with 26 locally acquired cases confirmed as of December 2, 2024. Dengue fever also remains present, with 22 cases reported since the end of August, primarily in the south.
The OPTIS project will include comprehensive studies to analyze the impact of SIT on both target and non-target insect populations, its effect on dengue transmission, and public perception. A communication strategy in collaboration with local authorities will ensure community engagement and awareness.
The long-term vision for OPTIS is the establishment of a local start-up to manage the enhanced SIT program from year three onwards. This initiative could have broad implications, not only for Reunion Island but also for the wider Indian Ocean region, offering a enduring and environmentally kind approach to mosquito control.