Grisi Siknis

The Grisi Siknis is a supernatural creature or event from Nicaragua. Its name translates to “plague of madness” and has been reported as recently as 2003. It has caused some to roam around naked holding knives or machetes. Victims of the Grisi Siknis have wild eyes and rarely recognize even their own family. It often affects women most, and those afflicted rarely have a memory of their actions after being cured. Sometimes it is described as an evil creature having settled upon a location and supposedly feeds off the negative energy of those who have gone mad. It is thought that this can be stopped by shamans from the Miskito tribe.

Citations:

Maberry, Jonathan. Vampire Universe: The Dark World of Supernatural Beings That Haunt Us, Hunt Us, and Hunger for Us. United States, Kensington Publishing Corporation, 2006.