Singapore is releasing millions [1] of male Aedes mosquitoes every week to suppress the local mosquito population and curb the spread of dengue.
This biological strategy aims to break the cycle of transmission in a city-state where dengue remains a persistent public health threat. By reducing the number of breeding females, the government seeks to lower the overall incidence of the disease across the island.
The program is managed by the National Environment Agency and partner research institutes [1]. The process involves the release of male Aedes mosquitoes infected with Wolbachia bacteria. These bacteria do not cause disease in humans but serve a specific reproductive purpose when introduced into the wild population [1].
When Wolbachia-infected male mosquitoes mate with wild females, the resulting eggs are non-viable [1]. Because the eggs cannot hatch, the total number of mosquitoes in the environment drops over time. This method targets the population growth without the use of widespread chemical insecticides, a sustainable approach to urban pest management.
Officials said millions [1] of these mosquitoes are released weekly as part of an ongoing effort that has been active for several years. The strategy focuses on the Aedes species, which is the primary vector for the dengue virus.
Reports said dengue cases in Singapore have reached a record low for the year [1]. While the specific number of cases was not provided, the trend suggests the Wolbachia program is contributing to a significant decline in transmission rates.
The National Environment Agency continues to monitor the effectiveness of the releases across various districts. The program relies on the consistent deployment of these males to ensure that wild females are more likely to mate with infected mosquitoes than with wild ones [1].
“Singapore is releasing millions of male Aedes mosquitoes every week”
The use of Wolbachia represents a shift toward biological control in public health, moving away from traditional chemical fogging. By targeting the reproductive viability of the Aedes mosquito, Singapore is attempting to create a long-term, self-sustaining reduction in disease vectors, which could serve as a model for other tropical urban centers facing similar dengue outbreaks.
