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The article describes the antibacterial properties of a clay found in France which has been successfully used to treat the skin disease Mycobacterium ulcerans. After a series of tests, researchers found that the clay is high in iron, causing its green color, and is strongly alkaline. They tested the clay on other bacterias and found it to stop the growth of Escherichia coli, salmonella and staphylococcus.

The article reports on a study published in the journal "Environmental Geochemistry and Health,"conducted by Lynda Williams and colleagues that reveals the potential of clays with antibacterial properties found near Crater Lake in Oregon as new agents in the fight against antibiotic-resistant superbugs. The study shows the effectivity of the clays against other strains of bacteria including beta-lactamase-resistant Escherichia coli and the potential of the clays in the pharmaceutical industry.