“A new study says that marijuana appears to fight infections. According to research published in the Journal of Natural Products,  the five most common cannabinoid compounds in weed—tetrahydrocannabinol (THC), cannabidiol, cannabigerol, cannabinol and cannabichromene—can kill antibiotic-resistant bacteria.”

More: http://www.scientificamerican.com/blog/post.cfm?id=whoa-the-stuff-in-pot-kills-germs-2008-08-27