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Hi, I'm Scientific American podcast editor Steve Merski.

Here's a short piece from the August 2018 issue of the magazine in the section called Advances, Dispatches from the Frontiers of Science, Technology, and Medicine.

Bloodthirsty by Rachel Neuer

Mosquitoes are the world's deadliest animals, transmitting diseases that

kill hundreds of thousands of people annually. Only the females bite to acquire protein to make

their eggs. But blood can also serve as a refreshing beverage on a hot, dry day. A new study finds

that dehydrated mosquitoes are more aggressive, land more

often on hosts, and feed more frequently than those with ready access to water. In quenching

their thirst, they may also increase the spread of disease. The studies by Joshua Benoit,

a biologist at the University of Cincinnati and his colleagues.

It appeared in the journal Scientific Reports. Because some mosquitoes lay their eggs on water,

researchers have long assumed that wetter conditions lead to more mosquito-borne illness.

Yet recent studies have hinted at the opposite, linking increased transmission of diseases such as West Nile fever

to droughts. Benoit and his colleague's discovery helps to resolve these counterintuitive findings.

Benoit became interested in the impact of dehydration on mosquito feeding behavior by accident.

A worker dropped a container of water-deprived mosquitoes and noticed that they

dive-bombed him with much greater vigor than usual. The researchers studied three mosquito species

...