There was a conference some months ago about books and one of the speakers brought the colour out of space from the story of the same name by H.P. Lovecraft as the cosmic vampire; it is a supernatural entity that sucks the life force out of everything around it while turning them infected by its nature and consuming them till the end. Meanwhile (he argued) the shambler from the stars by Robert Bloch mentions a creature that is popularly called "vampire" but the only vampiric thing it does is drinking the victim's blood and we are not given other charachteristics so it should not be called a "vampire".
What's your take on this? Do you know about creatures that could be called "vampires" but are not humans turned by a curse or disease but an weird thing like the colour mentioned above?