Dracunculus (animal) - Rod of Asclepius

Rod of Asclepius

It has been suggested that the Rod of Asclepius (the symbol which represents medical practice since ancient times) once represented a worm wrapped around a rod; parasitic worms such as the guinea worm (Dracunculus medinensis) were common in ancient times, and were extracted from beneath the skin by winding them slowly around a stick. According to this theory, physicians might have advertised this common service by posting a sign depicting a worm on a rod. However plausible, no concrete evidence in support of this theory has been adduced.