This is how they did it in the olden days. Slap on the clay. Watch wounds heal. Some animals still do (foxes that dig themselves into clay banks to heal wounds and/or broken limbs). Anyway, new research out of Arizona State University, reported by the Geological Society of America finds that one kind of French clay kills several kinds of disease-causing bacteria. Including Mycobacterium ulcerans, a germ related to leprosy and tuberculosis, which causes the flesh-eating disease Buruli ulcer. Currently, advanced cases of Buruli ulcer can only be cured by surgical excision or amputation. In lab tests, the French clay also killed bacteria responsible for many human illnesses, including: Staphylococcus aureus, methicillin-resistant S. aureus (MRSA), penicillin-resistant S. aureus (PRSA), and pathogenic Escherichia coli (E. coli). In other words, the really bad stuff we've bred through egregious overuse of antibiotics.
Julia Whitty is Mother Jones' environmental correspondent. You can read from her new book, The Fragile Edge, and other writings, here.