Every plant has some medicinal properties and many are yet to be discovered.
Indeed, it was only in 1910, that a scientist named W. H. Martindale documented that the essential oil of oregano is the most powerful plant-derived antiseptic known. In 1977, at the second International Congress of Phytotherapy and Aromatherapy in Monaco, a French doctor named Belaiche unveiled his Oregano Index that uses Oregano oil as the base reference to compare the bactericidal action of other substances. The reason he chose Oregano oil is because he determined by rigorous laboratory experimentation that, out of all natural essential oils, Oregano was the closest to an ideal antibacterial agent. He tested both the ability of essential oils to inhibit bacterial growth as well as to kill bacteria. Belaiche also chose to use bacterial cultures taken from sick persons rather than cultures grown in laboratories.