Suppression of Aedes aegypti may not affect sympatric Aedes albopictus populations: findings from two years of entomological surveillance in Singapore
Abstract Globally, multiple trials have successfully demonstrated the effectiveness of novel tools, such as the sterile and incompatible insect techniques, in suppressing Aedes aegypti populations. However, there is concern that Aedes albopictus, another arbovirus-competent vector, may occupy the ni...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-86139-z |
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| author | Wei Jian Wong Cheong Huat Tan Matthew Gregory Verkaik Lee Ching Ng Ary Anthony Hoffmann Chee-Seng Chong |
| author_facet | Wei Jian Wong Cheong Huat Tan Matthew Gregory Verkaik Lee Ching Ng Ary Anthony Hoffmann Chee-Seng Chong |
| author_sort | Wei Jian Wong |
| collection | DOAJ |
| description | Abstract Globally, multiple trials have successfully demonstrated the effectiveness of novel tools, such as the sterile and incompatible insect techniques, in suppressing Aedes aegypti populations. However, there is concern that Aedes albopictus, another arbovirus-competent vector, may occupy the niches vacated by Ae. aegypti in areas where these species occur in sympatry. Here we investigate these concerns within the context of a Wolbachia-based Ae. aegypti suppression programme in highly urban Singapore, where general mosquito management is sustained through environmental management. Using nationally representative and longitudinal Aedes surveillance data, we show (1) no consistent association of increase in Ae. albopictus abundance with Ae. aegypti population suppression within Wolbachia-Aedes release sites, and (2) no significant change in the vertical spatial distribution of Ae. albopictus in high-rise residential apartment blocks even after two years of Ae. aegypti suppression. Finally, we report that dengue viruses were less prevalent in field Ae. albopictus than in Ae. aegypti, which is consistent with previous findings that Ae. albopictus is a lesser vector than Ae. aegypti in Singapore. Together, these results indicate that suppression of Ae. aegypti in the community may not be directly associated with any increase of Ae. albopictus population or capacity. Nonetheless, the risk of increase in Ae. albopictus population is anticipated if the reduction in disease transmission leads to less aggressive source reduction efforts and environmental management for mosquito control. |
| format | Article |
| id | doaj-art-27fae2704c6a460fb557e1752602cd08 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-27fae2704c6a460fb557e1752602cd082025-01-19T12:17:44ZengNature PortfolioScientific Reports2045-23222025-01-0115111010.1038/s41598-025-86139-zSuppression of Aedes aegypti may not affect sympatric Aedes albopictus populations: findings from two years of entomological surveillance in SingaporeWei Jian Wong0Cheong Huat Tan1Matthew Gregory Verkaik2Lee Ching Ng3Ary Anthony Hoffmann4Chee-Seng Chong5Environmental Health Institute, National Environment AgencyEnvironmental Health Institute, National Environment AgencyEnvironmental Health Institute, National Environment AgencyEnvironmental Health Institute, National Environment AgencySchool of Biosciences, University of MelbourneEnvironmental Health Institute, National Environment AgencyAbstract Globally, multiple trials have successfully demonstrated the effectiveness of novel tools, such as the sterile and incompatible insect techniques, in suppressing Aedes aegypti populations. However, there is concern that Aedes albopictus, another arbovirus-competent vector, may occupy the niches vacated by Ae. aegypti in areas where these species occur in sympatry. Here we investigate these concerns within the context of a Wolbachia-based Ae. aegypti suppression programme in highly urban Singapore, where general mosquito management is sustained through environmental management. Using nationally representative and longitudinal Aedes surveillance data, we show (1) no consistent association of increase in Ae. albopictus abundance with Ae. aegypti population suppression within Wolbachia-Aedes release sites, and (2) no significant change in the vertical spatial distribution of Ae. albopictus in high-rise residential apartment blocks even after two years of Ae. aegypti suppression. Finally, we report that dengue viruses were less prevalent in field Ae. albopictus than in Ae. aegypti, which is consistent with previous findings that Ae. albopictus is a lesser vector than Ae. aegypti in Singapore. Together, these results indicate that suppression of Ae. aegypti in the community may not be directly associated with any increase of Ae. albopictus population or capacity. Nonetheless, the risk of increase in Ae. albopictus population is anticipated if the reduction in disease transmission leads to less aggressive source reduction efforts and environmental management for mosquito control.https://doi.org/10.1038/s41598-025-86139-z |
| spellingShingle | Wei Jian Wong Cheong Huat Tan Matthew Gregory Verkaik Lee Ching Ng Ary Anthony Hoffmann Chee-Seng Chong Suppression of Aedes aegypti may not affect sympatric Aedes albopictus populations: findings from two years of entomological surveillance in Singapore Scientific Reports |
| title | Suppression of Aedes aegypti may not affect sympatric Aedes albopictus populations: findings from two years of entomological surveillance in Singapore |
| title_full | Suppression of Aedes aegypti may not affect sympatric Aedes albopictus populations: findings from two years of entomological surveillance in Singapore |
| title_fullStr | Suppression of Aedes aegypti may not affect sympatric Aedes albopictus populations: findings from two years of entomological surveillance in Singapore |
| title_full_unstemmed | Suppression of Aedes aegypti may not affect sympatric Aedes albopictus populations: findings from two years of entomological surveillance in Singapore |
| title_short | Suppression of Aedes aegypti may not affect sympatric Aedes albopictus populations: findings from two years of entomological surveillance in Singapore |
| title_sort | suppression of aedes aegypti may not affect sympatric aedes albopictus populations findings from two years of entomological surveillance in singapore |
| url | https://doi.org/10.1038/s41598-025-86139-z |
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