They gathered 20 samples of medical marijuana from across California and took them apart, pulling out a range of dangerous bacteria and fungi which they analyzed right down to their DNA.
Even Land was surprised by the results. “We were a little bit startled that ninety percent of those samples had something on them. Some DNA of some pathogen,” he told KPIX 5.
http://hempbeach.com/fungus-in-medical-marijuana-eyed-as-possible-cause-in-california-mans-death/