Biotechnology firm Oxitec ran the first open-air test of genetically modified mosquitoes in the United States by placing boxes of its eggs in selected spots in the Florida Keys. Credit: Joe Raedle/Getty

Genetically modified this and that have been concerns of ours for most of the time we have been posting on environmental issues and nature news. This news below may be the best test of how tolerant one might become about a technology that is inherently full of danger–of the unintended consequences variety more than the known in advance variety–and yet could tame some of the greatest natural pests that mankind suffers from:

Biotech firm announces results from first US trial of genetically modified mosquitoes

Oxitec reports that its insects behaved as planned — but a larger trial is needed to learn whether they can reduce wild mosquito populations.

Researchers have completed the first open-air study of genetically engineered mosquitoes in the United States. The results, according to the biotechnology firm running the experiment, are positive. But larger tests are still needed to determine whether the insects can achieve the ultimate goal of suppressing a wild population of potentially virus-carrying mosquitoes.

The experiment has been underway since April 2021 in the Florida Keys, a chain of tropical islands near the southern tip of Florida. Oxitec, which developed the insects, released nearly five million engineered Aedes aegypti mosquitoes over the course of seven months, and has now almost completed monitoring the release sites.

Based in Abingdon, UK, the firm reported the first results from the experiment during a webinar on 6 April, although it has not yet published the data.

Following the plan

Wild A. aegypti mosquitoes can carry viruses such as chikungunya, dengue, Zika and yellow fever, so scientists have sought ways to reduce their populations. Oxitec’s engineered males carry a gene that is lethal to female offspring. If all goes to plan, when released into the environment, the engineered males should mate with wild females, and their female offspring will die before they can reproduce. Male offspring will carry the gene and pass it on to half of their progeny. As each generation mates, more females die, and the A. aegypti population should dwindle…

Read the entire article here.