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This is Scientific Americans' 60-second science. I'm Karen Hopkins. This will just take a minute.

It may sound strange, but scientists are celebrating the survival and spread of tens of thousands

of mosquitoes they released in Northeastern Australia. The whole thing makes more sense when you

know that these mosquitoes are not just any run-of-the-mill bloodsuckers.

They're weaponized, infected with a type of bacteria that prevents the spread of Zika, Dengay,

and other mosquito-borne viruses.

The bacterium, called Wolbachia, is present naturally in nearly two-thirds of all insect species.

Although it's not usually found in 80s Egypti, the mosquito responsible for spreading zika, dengue, yellow fever, and chicken gunia. But when researchers introduced Wolbachia into

mosquitoes in the lab a decade ago, the bacteria bollocks the skeeters, making them unable to transmit

their viruses to humans, which gives public health experts hope that by releasing

big groups of Wolbachia infected mosquitoes into problem areas, they'll spread Wolbachia to the local

populations, making them incapable of transmitting viral diseases to people. But a big question was,

will the weaponized mosquitoes remain contained where they're let loose,

or will they move enough to mingle with their wild brethren?

So researchers in Australia ran a test.

In 2013, they released some 35,000 Wolbachia carrying 80s Egypti at one site, 131,000 at a second

site and 286,000 at a third site, all in the city of Cairns.

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