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Florida releases genetically modified mosquitoes in hopes to reduce spread of disease

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Genetically modified mosquitoes have been launched for the primary time in the United States, chickening out in the Florida Keys in a pilot program supposed to reduce the spread of lethal ailments comparable to dengue, yellow fever and the Zika virus.

After an odyssey spanning greater than a decade to safe regulatory approval, British-based biotechnology firm Oxitec, together with the Florida Keys Mosquito Control District (FKMCD)launched the venture in hope of decreasing the Aedes aegypti species that spread the ailments.

While Oxitec and native authorities have excessive hopes for this system, native residents and environmental teams fear that not sufficient is thought concerning the long-term results of the brand new know-how.

Nevertheless, the Environmental Protection Agency granted an experimental use allow (EUP) to Oxitecon May 1.

A half-dozen bins 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 feminine Aedes aegypti chunk and spread disease, so Oxitec has created males that cross on a gene that kills feminine offspring earlier than they mature. Their male offspring then proceed mating and passing on the altered gene.

Meredith Fensom, Oxitec’s head of international public affairs, defined how the bins 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 mentioned.

The firm says comparable tasks have had over a 90 p.c success fee in Brazil, Panama, the Cayman Islands and Malaysia.

Some 12,000 mosquitoes shall be launched in the preliminary stage, however later this yr tens of thousands and thousands of genetically modified Aedes aegypti will fan out throughout the area.

The mosquitoes have additionally been designed to emit a fluorescent glow, in order that when they’re captured, they are often extra simply recognized and studied.

“That’s how we monitor for the project before, during and after to understand the mosquito population,” mentioned Fensom.

The venture received a lift in 2016, when it was authorised in a referendum in the Keys, regardless of opposition from some residents.

A handbook is seen at Florida Keys Mosquito Control District headquarters, in Marathon, Florida, U.S. May 4, 2021. REUTERS/Marco Bello

FKMCD Executive Director Andrea Leal says she understands neighborhood issues however that conventional strategies like fumigation from vehicles and helicopters have develop into more and more ineffective.

“We are seeing resistance in some of our current control methods, which has made our job at Mosquito Control that much harder,” mentioned Leal at FKMCD headquarters in Marathon, Florida.

“We’re looking to integrate whatever we can into our current control methods just to make sure that we can suppress that population below disease transmission thresholds.”


The authorities first turned to Oxitec after a dengue fever outbreak slammed Key West in 2009 and 2010, USA Today reported.

But environmentalists like Barry Wray, who heads the Florida Keys Environmental Coalition, will not be persuaded by the lengthy regulatory approval course of.

He says it was haphazard and leaves too many questions unanswered. “You’re going to risk our community, you’re going to ask the people in our community to be sacrificial lambs, really.”

There even have been issues that as a result of the genetically altered females are initially uncovered to the antibiotic tetracycline, it might not directly enhance the possibilities of antibiotic-resistant infections in people, USA Today reported.

But native residents like veterinary scientist Doug Mader says the science is sound.

“There haven’t been any side effects to the environment or people reported. So to say that we can’t use GMOs is like saying: ‘Hey, let’s not vaccinate for COVID,'” mentioned Mader.

Leal says that whereas the Aedes aegypti are liable for nearly all mosquito-borne disease transmission, they make up solely 4 p.c of the whole inhabitants.

“We have over 45 species in the Florida Keys. This particular mosquito is an invasive mosquito, it’s not from here…So, it’s not part of our natural ecosystem,” she mentioned.

If the Florida Keys venture succeeds, Oxitec plans to submit the outcomes to the EPA in order that this system will be utilized in different components of the United States, the journal Nature reported.

(This story has been refiled to appropriate byline.)

Our Standards: The Thomson Reuters Trust Principles.

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