Vrkolak

In Bulgaria, in the Demir-Haskov region,there is a type of vampire known as a vrkolak. Described as looking like a shadow, this vampire is created when the blood from a person who was murdered with a gun or a knife falls to the ground. Fourteen days later, the blood that was spilt will become a vrkolak and immediately set out to spread diseases to the local livestock. The vrkolak can only be slain by a type of vampire seer known as a SÂBOTNIK, who will kill the vampire in the same method that it was created. For example, if the vrkolak was created through a murder committed with a knife, then the SÂBOTNIK must use a knife to slay the vampire. Additionally, a dog that is a SÂBOTNIK can destroy a vrkolak with its bite.

Source: Alexander, Mythology of All Races, 229; Baring-Gould, Book of Were-Wolves, 64; Mc Clelland, Slayers and Their Vampires, 105; Summers, Werewolf in Lore and Legend, 16