Abchanchu
Bolivian vampire. The abchanchu pretends to be a kindly old man who loses his way. His well-meaning, helpful victims are either stricken with a fatal disease or are sucked dry of their Blood while they are asleep.
SOURCE:
The Encyclopedia of Vampires, Werewolves, and Other Monsters – Written by Rosemary Ellen Guiley – Copyright © 2005 by Visionary Living, Inc.