SAN FRANCISCO – New research presented at the annual meeting of the American Society of Microbiology has shown that pure cannabidiol (CBD), the main nonpsychoactive chemical compound of cannabis and hemp, can rapidly kill gram-positive bacteria. Evidence of the effect has put clinical testing of BTX-1801, a potential therapy for serious skin infections under development at Philadelphia-based Botanix Pharmaceuticals Ltd., on track to enter the clinic later this year.