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This is Scientific American's 60-second science.

I'm Christopher in Taliatta.

It's bad enough the mosquitoes suck our blood and sometimes pass on disease, but there's more.

They can actually give you a disease and pee on you at the same time, so adding insult to injury, if you will.

Jared Denton, a pharmacologist at Vanderbilt University Medical Center.

If you look up almost any picture on Google of mosquito taking a blood meal, you will see a

clear droplet of fluid hanging out of the rear end of the mosquito, and that's actually

the urine that the mosquito has made from your blood.

That pea production is vital to the mosquito's survival because blood is salty.

And as these mosquitoes digest the red blood cells to get at the proteins and other nutrients

hiding there, they release potassium chloride, which can cause depolarization of the membrane potential of excitable cells

and induce cytotoxic death.

Translation, not good.

So mosquitoes and other bloodsuckers have evolved a rapid diuretic process to expel salt from

their bodies using kidney-like structures. Basically, while still

sucking blood, they start peeing. But Denton and his colleagues found a way to block all that.

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