Cannabis extracts have an antibacterial effect upon the following microbes: Staphylococcus pyogenes aureus, Streptococcus alpha haemolyticus, Streptococcus beta haemolyticus, Enterococcus, Diplococcus pneumoniae, B. subtilis, B. anthracis, Corynebacterium diphtheria, and Corynebacterium cutis. Note-worthy was the effect upon Staphylococcus aureus strains, which are developed resistance to penicillin and other antibiotics in the 1940s.