Fungus-impregnated fabric could soon replace chemically-soaked bed-nets as a defence against malaria, researchers claim. As a week-long international malaria conference wrapped up in the Cameroonian capital of Yaounde this weekend, researchers unveiled findings that showed a fungus could be used to kill malaria carrying mosquitoes. Researchers sprayed black fabric with fungi spores which infected and killed mosquitoes in tests in a Tanzanian village.