Go check out the alledged link between the snake wrapped staff that's used to represent medicine and the treatment for guinea worms. Googling puts that theory with the Ebers papyrus from 1500 BC if it's true!
Confusingly, there's actually two similar staves that get mixed up. The helix patterned one with two winged snakes I think you have in mind is called the Caduceus, but the the single wingless version I meant is the staff of Aesculapius (multiple spellings out there).