People with malaria give off a distinctive "breath-print" that could be used as a test for the disease, according to American scientists.
They had already tried out a crude prototype breathalyser in Africa, a tropical medicine conference heard.
The test was reasonably good at detecting cases in children, but needs developing to become a routine device.
One of the odours it sniffs out is identical to a natural smell that attracts insects that spread malaria.
Pine trees and conifers emit these terpenes to summon mosquitoes and other pollinating insects, say the researchers, from Washington University in St Louis.
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