FLORIDA – Genetically modified mosquitoes have been released for the first time in the United States, taking flight in the Florida Keys in a pilot program intended to reduce the spread of deadly diseases such as dengue, yellow fever and the Zika virus.
After an odyssey spanning more than a decade to secure regulatory approval, British-based biotechnology firm Oxitec, along with the Florida Keys Mosquito Control District (FKMCD)launched the project in hope of reducing the Aedes aegypti species that spread the diseases.
While Oxitec and local authorities have high hopes for the program, local residents and environmental groups worry that not enough is known about the long-term effects of the new technology.
Nevertheless, the Environmental Protection Agency granted an experimental use permit (EUP) to Oxitecon May 1.
A half-dozen boxes containing the OX5034 mosquito created by Oxitec have been deployed in the Florida Keys, an archipelago stretching 120 miles (195 km) off the southern tip of the state.
Only female Aedes aegypti bite and spread disease, so Oxitec has created males that pass on a gene that kills female offspring before they mature. Their male offspring then continue mating and passing on the altered gene.
Meredith Fensom, Oxitec’s head of global public affairs, explained how the boxes work.
“Inside we have a small container, and this is what we put the mosquito eggs in. We also have a small container for food. We leave it open. And then we fill the box, less than halfway full, with water. We close the lid, and after a week or two, our non-biting male mosquitoes begin to emerge,” she said.
The company says similar projects have had over a 90 percent success rate in Brazil, Panama, the Cayman Islands and Malaysia.