Last updated on June 1st, 2015 at 10:31 pm
Four hundred years ago, the world was so afraid of Galileo’s scientific ideas that the Catholic Church put him under house arrest for the rest of his life. And he was just describing heliocentrism, the astronomical model where the earth revolves around the sun. Very important to our understanding of the universe, but it was not a life or death matter. You would assume that if a new scientific idea that would help people live longer and healthier, then there would be no fear. However, that assumption is disproven again and again with the antivaccine gang and the Big Pharma ad hominems that we hear frequently.
Over the past couple of years, I’ve written about an innovative an small UK based biotech firm, Oxitec, which has developed genetically modified male mosquitos, sometimes referred to as Frankensquitos (at term I fully embrace as being both ironic and descriptive) that would mate with wild females. Those females would produce offspring that would not survive to adults, because they require an antibiotic, tetracycline, in their diet, something that isn’t usually available in the the wild. Over time, with multiple releases of males, the population of the Aedes aegypti mosquito, which is the vector for transmitting Dengue fever. would fall to such a level that transmission of the the disease would be significantly reduced, if not completely stopped.
The benefits of this type of control of the mosquito are tremendous. First, and most important, is that it avoids the use of pesticides which has infinitely more downsides to the environment than any imagined beliefs about genetically modified mosquitoes. Pesticides also have effects on other species of insects that are not an issue, or even other organisms including birds and mammals. To significantly reduce a pest like a single species of mosquito without pesticides should be considered a huge environmental win.
Second, because the modified mosquito only lasts one generation, the net effect to the environment is only one generation, essentially 2-4 weeks, much shorter than any pesticide. So there isn’t a persistent population of genetically modified mosquitoes, all of the ones that descend from the modified males would perish before making a next generation.
Third, it is more efficient and effective than the dominant method for reducing insect populations–the “sterile insect technique” (SIT), which relies upon radiation to sterilize males, which are then released into infested areas to mate. Unfortunately this approach, which has been used since the middle of the last century, has not been effective with mosquitoes, as a result of the fragility of radiated males.
In an article about the technology, Oxitec seems truly devoted to finding solutions to problems that affect humans:
The company, Oxford Insect Technologies in its unabbreviated form, believes its technique is effective, cheap and far less damaging to the environment than the use of pesticides but its problem is the phrase “genetically modified” and the kneejerk fears it engenders. Critics see a ruthless corporate giant aiming to monopolise a market for commercial ends, which could have unknown effects on unknown things. For many critics, the mystery is often as potent as the evidence. Oxitec could not be more different from the multinationals. It employs 40 people, 35 of whom are scientists. It doesn’t have a public relations department, or even person, instead relying on Hadyn Parry and senior scientists to explain its work to the public.
A small company, made up of mostly scientists dedicated to helping people, is probably the most harmless group of people in the world. They probably sit around a table thinking of every possible issue, thinking through the science as good scientists do. They seek out evidence, test the null hypothesis, before they test in the wild. Again, the anti-science attitude is that science is something this side of magic, two or three experiments in a test tube, then throw it in a human. That’s not how it works. Oxitec has been doing this for at least 10 years before trying to it in the wild. This isn’t a random idea in a random idea.
Back to why we could use these Frankensquitos. Although Dengue fever is rare in the USA, there have been outbreaks in 2009 and 2010 in the Florida Keys, and one in 2005 in Texas. And with higher temperatures and sea level rises, the mosquito vectors for Dengue will move further and further north putting more of the world population at risk.
The principal symptoms of dengue fever are high fever, severe headache, severe pain behind the eyes, joint pain, muscle and bone pain, rash, and mild bleeding (e.g., nose or gums bleed, easy bruising). Generally, younger children and those with their first dengue infection have a milder illness than older children and adults. Dengue hemmorhagic fever (DHF) is a more severe form of dengue infection. It can be fatal if unrecognized and not properly treated in a timely manner. DHF is caused by infection with the same viruses that cause dengue fever. With good medical management, mortality due to DHF is still significant, but can be reduced to less than 1%.
But still, after several years of testing, the crazy internet still is opposed to the release of these so-called Frankensquitos. But the real science, published in one of the top scientific journals in the world, Nature Biotechnology, shows that it works.
We report data from the first open-field trial involving a strain of engineered mosquito. We demonstrated that genetically modified male mosquitoes, released across 10 hectares for a 4-week period, mated successfully with wild females and fertilized their eggs. These findings suggest the feasibility of this technology to control dengue by suppressing field populations of A. aegypti.
Sounds good to me. Except, the Luddites, those who must think that Dengue Fever is “nothing,” invented some ridiculous reasons for opposing the release:
What about our native species of Florida Keys Bats. Are there any studies being conducted to see if these mosquitoes will harm the native bat population?
I’m sorry, but what? Exactly how are these mosquitoes, which have a change in one gene so that they require tetracycline to survive, going to harm a bat. Because, as I’ve stated before, the DNA/RNA of food sources do not get transferred to the consuming species. It’s physiologically impossible, and betrays a high degree of biological ignorance for anyone who writes that. Oh but there’s more.
Will the more virulent Asian tiger mosquito that also carries dengue fill the void left by reductions in A. aegypti? Will the dengue virus mutate (think antibiotic resistant MRSA) and become even more dangerous?
Wow, that’s like every logical fallacy wrapped together. How is antibiotic MRSA related to dengue virus. Dengue virus needs an appropriate vector to transmit it, and the symbiotic relationship between the mosquito and the virus occurred over 100 million years. Dengue cannot suddenly switch to another mosquito, like the Asian tiger mosquito which happens to actually be a much poorer vector for the virus. Besides Oxitec also has Asian tiger Frankensquitos. So there you go.
There has been substantial scientific research to develop products such as Oxitec mosquitoes proceeds progressively from the laboratory to confined trials to limited field trials. In each case, Oxitec formally informed the governing authorities of their actions, and received approval to do so. Oxitec has conducted field trials in the Cayman Islands, Malaysia, and Brazil, it is preparing to conduct trials in other countries, including the United States. Oxitec’s trials are always appropriately controlled and monitored, by its own and independent scientists, to ensure that they are safe and effective, and are frankly closely monitored by various regulatory bodies.
But, as you know, when anyone starts discussing how genetic engineering can actually help our lives, science gets set aside and politics matters more. Activists, using the same techniques as all science deniers, whether creationists or global warming deniers, try to create a debate that sounds scientific, but never really is. The fact is that molecular genetic engineering is more precise and predictable than older, cruder techniques like irradiation, for mosquitos. Ironically, the SIT method, using radiation, is mostly unregulated with little or no science that supports the safety and effectiveness of SIT. On the other hand, the regulatory reviews of genetically engineered living organisms have tended to be drawn out and excessively cumbersome throughout the world, with political debate delaying or preventing approvals. As a consequence, lifesaving technology, like the genetically modified mosquitoes, becomes more expensive, and possibly may never be employed to protect human health.
The World Health Organization, by no means in the “pocket” of Big Pharma or Big Chemical (or Big Mosquito, I suppose) has requested that regulatory agencies emphasize “science-based, case-by-case targeted requirements with a degree of practical parsimony,” instead of relying on “a precautionary approach that can require data to address all theoretical risks.” In other words, quit delaying technology that can help mankind because of an oversensitivity to political debates that can be largely dismissed by real science.
There are no convincing arguments, at least from a scientific point of view, that genetically modified mosquitoes pose any danger to humans, other animals, plant life, the environment, anything. However, we have boatloads of scientific evidence that shows that mosquito-borne illnesses, like Dengue fever, harm and kill human beings. We have boatloads of scientific evidence that these Frankensquitos can save lives by crushing the numbers of disease carrying mosquitos. Regulators have got to stand up for science and reject the ridiculous populist rhetoric that puts up pseudoscientific roadblocks to progress.
The elitist anti-biotechnology cult seems to have one goal in mind, and it’s not to help humanity. They want to block anything that doesn’t support their narrow-minded view of the planet, that only some Naturalistic Fallacy, an Appeal to Nature, that the only right way doesn’t include biotechnology, because it’s not natural. That kind of arrogance is going to kill us all.
- Centers for Disease Control and Prevention (CDC). Dengue hemorrhagic fever–U.S.-Mexico border, 2005. MMWR Morb Mortal Wkly Rep. 2007 Aug 10;56(31):785-9. Erratum in: MMWR Morb Mortal Wkly Rep. 2007 Aug 17;56(32):822. PubMed PMID: 17687243.
- Graham AS, Pruszynski CA, Hribar LJ, DeMay DJ, Tambasco AN, Hartley AE, Fussell EM, Michael SF, Isern S. Mosquito-associated dengue virus, Key West, Florida, USA, 2010. Emerg Infect Dis. 2011 Nov;17(11):2074-5. doi: 10.3201/eid1711.110419. PubMed PMID: 22099104; PubMed Central PMCID: PMC3310564. Impact factor: 5.993
- Harris AF, Nimmo D, McKemey AR, Kelly N, Scaife S, Donnelly CA, Beech C, Petrie WD, Alphey L. Field performance of engineered male mosquitoes. Nat Biotechnol. 2011 Oct 30;29(11):1034-7. doi: 10.1038/nbt.2019. PubMed PMID: 22037376. Impact factor: 32.44
- Racloz V, Ramsey R, Tong S, Hu W. Surveillance of dengue fever virus: a review of epidemiological models and early warning systems. PLoS Negl Trop Dis. 2012;6(5):e1648. doi: 10.1371/journal.pntd.0001648. Epub 2012 May 22. Review. PubMed PMID: 22629476; PubMed Central PMCID: PMC3358322. Impact factor: 4.569.
- Radke EG, Gregory CJ, Kintziger KW, Sauber-Schatz EK, Hunsperger EA, Gallagher GR, Barber JM, Biggerstaff BJ, Stanek DR, Tomashek KM, Blackmore CG. Dengue outbreak in Key West, Florida, USA, 2009. Emerg Infect Dis. 2012 Jan;18(1):135-7. doi: 10.3201/eid1801.110130. PubMed PMID: 22257471; PubMed Central PMCID: PMC3310087. Impact factor: 5.993.
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