Bacteria-Treated Mosquitoes Released in More Locations

Infected with Wolbachia, the insects are expected to reduce the spread of dengue and Zika. But scientists say the approach may have limitations.

kerry grens
| 2 min read

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WIKIMEDIA, SCOTT O'NEILLAedes mosquitoes infected with the bacterium Wolbachia can slow the spread of dengue and Zika viruses carried by the insects, and several nations have launched early programs to deploy the mosquitoes, while others plan to introduce or expand their deployment.

Earlier this month (January 6), Eliminate Dengue announced its intention to expand from field trials to pilot sites in Nha Trang, Vietnam this coming March, a few months after the organization unveiled plans to increase the release of bacteria-treated mosquitoes in Colombia and Brazil. “The release of mosquitos with Wolbachia has been implemented on a trial basis in the city’s Tri Nguyen island, and has proved effective,” according to Xinhua, “no dengue fever outbreaks have been reported in the island.”

In December, Radio New Zealand reported that the island of New Caledonia would also release Wolbachia-laced mosquitoes. Indonesia and Australia, too, are expanding the number of sites where researchers are releasing bacteria-bearing mosquitoes.

Eliminate Dengue’s approach reduces the transmissibility of the virus among mosquitoes. Another ...

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Meet the Author

  • kerry grens

    Kerry Grens

    Kerry served as The Scientist’s news director until 2021. Before joining The Scientist in 2013, she was a stringer for Reuters Health, the senior health and science reporter at WHYY in Philadelphia, and the health and science reporter at New Hampshire Public Radio. Kerry got her start in journalism as a AAAS Mass Media fellow at KUNC in Colorado. She has a master’s in biological sciences from Stanford University and a biology degree from Loyola University Chicago.

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