Caduceus eloquence). The caduceus is often incorrectly used as a symbol of healthcare organizations and medical practice, particularly in North America, due to confusion with the traditional medical symbol, the Rod of Asclepius, which has only one snake and is never depicted with wings. It is thought that this symbol's long lasting association with the medical profession stems from early use of twigs to draw out long bodied inter muscular parasitic worms by wrapping them slowly around the twig so as not to break them or allow them to escape back into the body, a successful treatment still in use today,
Caduceus as a symbol of medicine appears in a general medical context in the printer's device used by the Swiss medical printer Johann Frobenius (1460–1527), who depicted the staff entwined with serpents and surmounted by a dove, with a biblical epigraph in Greek, "Be ye therefore wise as serpents and harmless as doves" (Matthew 10:16, here in the KJV translation), in keeping with the connotations of the caduceus as a symbol of messengers and publishers based on the association of Hermes or Mercury with eloquence and negotiation. Friedlander observed that Frobenius could hardly be considered a medical printer, as had previously been asserted, noting that in