Caduceus
Citing the history of the caduceus, some physicians are critical of the symbol, because Hermes also happens to be the god that leads the dead to the underworld and is not only associated with wealth and commerce, but happens to be the patron of thieves (he is a classic trickster figure in Greek myths). It only makes sense that doctors wouldn't want to be associated with trickery, death, and the accumulation of wealth! Medical purists suggest we should go back to the staff of Aesculapius, which is depicted as a single serpent coiled around a cypress branch. http://www.endicott-studio.com/rdrm/forcaduc.html