A human who seemingly dies at the hand of a "Bokor" (a practitioner of Voodoo who performs Black Magick, for financial gain) then comes back to life after three days and serves a master as a mindless, but strong slave.
The celebrated, Dr. Wade Davis, an ethno-botanist, presented a pharmacological case for zombies in the contemporary classic, The Serpent and the Rainbow. Dr. Davis traveled to Haiti and reported that a living person could be Zombified by the ingestion of two unique powders: Coup de Poudre ('Powder Strike') induced a 'death-like' state, the key ingredient of which was tetrodotoxin, which is found in puffer-fish. The second powder of is a concoction of hallucinogens that holds the person in a helpless state. Dr. Davis made famous the story of Clairvius Narcisse, who was reported to have succumbed to this Zombification.
The practice of Zombification is practiced primarily in Haiti and the United States.