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Posted Thu Nov 11 2010: from Huffington Post:
GM Mutant Mosquitoes Fight Dengue Fever In Cayman Islands, But Experiment Could Wreak Havoc On Environment, Critics Say http://apocadocs.com/s.pl?1289497432
Scientists have released genetically modified mosquitoes in an experiment to fight dengue fever in the Cayman Islands, British experts said Thursday. It is the first time genetically altered mosquitoes have been set loose in the wild, after years of laboratory experiments and hypothetical calculations. But while scientists believe the trial could lead to a breakthrough in stopping the disease, critics argue the mutant mosquitoes might wreak havoc on the environment. "This test in the Cayman Islands could be a big step forward," said Andrew Read, a professor of biology and entomology at Pennsylvania State University, who was not involved in the project. "Anything that could selectively remove insects transmitting really nasty diseases would be very helpful," he said.... Researchers at Oxitec Limited, an Oxford-based company, created sterile male mosquitoes by manipulating the insects' DNA. Scientists in the Cayman Islands released 3 million mutant male mosquitoes to mate with wild female mosquitoes of the same species. That meant they wouldn't be able to produce any offspring, which would lower the population. Only female mosquitoes bite humans and spread diseases.... He said mosquito larvae might be food for other species, which could starve if the larvae disappear. Or taking out adult mosquito predators might open up a slot for other insect species to slide in, potentially introducing new diseases. Humans have a patchy track record of interfering with natural ecosystems, Riley said. In the past, such interventions have led to the overpopulation of species including rabbits and deer. "Nature often does just fine controlling its problems until we come along and blunder into it."
[Read more stories about: GMOs, unintended consequences]

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