Lab-grown mosquitoes bred to carry Wolbachia bacteria fight dangerous dengue fever, new research shows
A Pakistani patient suffering from dengue fever, rests in a hospital in Karachi, Pakistan, Wednesday, October 30, 2109.
It’s the first evidence from large-scale field trials that mosquitoes are less likely to spread dengue and similar viruses when they also carry a type of bacteria that’s common in insects and harmless to people. Dengue is transmitted when a mosquito bites someone who is infected, and then bites another person, but somehow Wolbachia blocks that — and local transmission has nearly disappeared in those North Queensland communities, Simmons said in an interview.
Researchers found a similar drop in a community near the southern Vietnamese city of Nha Trang. And preliminary results suggest large declines in dengue and a related virus, chikungunya, in a few neighbourhoods in Brazil near Rio de Janeiro. Reducing disease “is the ultimate success of our field,” added University of Maryland biologist Brian Lovett, who also wasn’t part of the project.
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