750 million genetically engineered mosquitoes approved for release in Florida Keys

CNN  — 

A genetically modified male mosquito named OX5034 has received both state and federal approval to be released into the Florida Keys now through 2022, against the objection of many local residents and a coalition of environmental advocacy groups.

“With all the urgent crises facing our nation and the State of Florida — the Covid-19 pandemic, racial injustice, climate change — the administration has used tax dollars and government resources for a Jurassic Park experiment,” said Jaydee Hanson, policy director for the International Center for Technology Assessment and Center for Food Safety, in a statement released Wednesday.

“Now the Monroe County Mosquito Control District has given the final permission needed. What could possibly go wrong? We don’t know, because EPA unlawfully refused to seriously analyze environmental risks, now without further review of the risks, the experiment can proceed,” she added.

“What could possibly go wrong? We don’t know, because they unlawfully refused to seriously analyze environmental risks,” she said.

The mosquito OX5034 has been altered to produce female offspring that die in the larval stage, well before hatching and growing large enough to bite and spread disease. Only the female mosquito bites for blood, which she needs to mature her eggs. Males feed only on nectar, and are thus not a carrier for disease.

The mosquito is also approved to be released into Harris County, Texas, beginning in 2021, according to Oxitec, the US-owned, British-based company that developed the genetically modified organism (GMO).

The Environmental Protection Agency granted Oxitec’s request last month, after years of investigating the impact of the genetically altered mosquito on human and environmental health.

“This is an exciting development because it represents the ground-breaking work of hundreds of passionate people over more than a decade in multiple countries, all of whom want to protect communities from dengue, Zika, yellow fever, and other vector-borne diseases,” Oxitec CEO Grey Frandsen said in a statement.

However, state and local approval for the Texas release has not been granted, said Sam Bissett, a communication specialist with Harris County Public Health.

“Local health officials confirm that there is no agreement in place or plans to move forward with the project at this time,” Bissett told CNN. “Our focus is on our efforts with the Covid-19 pandemic.”

A long fight in Florida

The state of Florida issued an Experimental Use Permit in June 2020 after seven state agencies unanimously approved the project. But it took over a decade to obtain that approval.

The local outbreaks of dengue fever a decade ago left the Florida Keys Mosquito Control District desperate for new options. Despite an avalanche of effort – including aerial, truck and backpack spraying and the use of mosquito-eating fish – local control efforts to contain Aedes aegypti with larvicide and pesticide had been largely ineffective.

And costly, too: Even though Aedes aegypti is only 1% of its mosquito population, Florida Keys Mosquito Control typically budgets more than $1 million a year, a full tenth of its total funding, to fighting it.

The district reached out to Oxitec for help in 2012. The company had developed a male mosquito named OX513A, programmed to die before adulthood unless it was grown in water that contained the antibiotic tetracycline.

Batches of the OX513A would be allowed to live and mate with females; however, their male and female offspring would both inherit the “kill” programming and die, thus limiting population growth. Because few offspring survived, mass production and release of the GMO male was consistent to control local populations.

The OX513A mosquito had been field-tested in the Cayman Islands, Panama and Brazil, with Oxitec reporting a large success rate with each release. For example, a trial in an urban area of Brazil reduced the presence of local Aedes aegypti by 95%.

But when word spread in the Florida Keys that a GMO mosquito was on the way, public backlash was swift. More than 100,000 people signed a Change.org petition against the proposal; that number has grown to more than 237,000.

The EPA and US Food and Drug Administration spent years investigating the mosquito’s impact on both human health and the environment, allowing time for public input along the way, Frandsen said.

The EPA spent years investigating the mosquito’s impact on both human health and the environment, allowing time for public input. But in the midst of the evaluation, Oxitec developed a second-generation “Friendly Mosquito” technology and withdrew the application for the first.

Today, environmental groups and local advocates worry that the new “Friendly” mosquito has not been as rigorously tested as the first generation, a claim that Oxitec roundly refutes.

Despite a lengthy, ongoing public education campaign by local officials, including monthly webinars designed to address citizen concerns, critics like Barry Wray believe that many Florida Key residents have no idea that “mutant” mosquitoes are coming.

However, environmental groups worry that the spread of the genetically modified male genes into the wild population could potentially harm threatened and endangered species of birds, insects and mammals that feed on the mosquitoes.

“The Florida Keys and Houston and the surrounding communities are home to some of the most diverse and threatened species in our country. Once again, the Trump administration is callously disregarding scientific experts and the will of communities to force this risky experiment through,” said Dana Perls, program manager for the food and technology campaign of Friends of the Earth, in a statement.