The vampire symbiote is a mysterious organism that maintains a complex endosymbiotic relationship with animals in order to survive, and brings about vampiric tendencies in its hosts. Though thought to be compatible with most animals, the only known examples so far have been humans and dogs. When a human becomes host to the symbiont, the individual becomes a Vampire (Homo sapiens vampiris), when with a dog, the term Chupacabra (Canis lupus vampiris) has been applied. A changed individual is counted as a separate subspecies because of the degree of genetic recombination that comes with becoming host.
Its evolutionary history is untraceable, because it appears unrelatable to any other form of life ever known to exist on Earth. It must have been present on Earth since at least the classical era, however, as it is known to have inspired vampire lore. It is unknown if the symbiote is a single species or more than one variety exists, as its existence is widely undocumented nor has it yet been biologically classified.
The vampire symbiote isn't thought to be self-aware, nor can it sustain its physical form outside of the body of an animal host. Like a virus, it imposes its own genetic material upon the DNA of its host. The altercations it makes are carried over into all new cells, and spread to affect most pre-existing cells as well, ultimately leading to changes in the nervous system, muscular system, and certain glands as well as the creation of a whole-new organ system that allows for the digestion of materials carried in the blood to be used as an additional source of energy.
After a victim first becomes infected, the symbiote's reproductive cells will circulate throughout the blood stream for about a week, until the first pieces of alien tissue begin to build up around the cerebellum of the brain and the thyroid gland of the neck. From these control stations, the symbiontt
The transformation of the body of the host can take place over the period of one month to one year. Over this period of time, the victim will often become sickly from a significantly weakened immune system, and lack of nutrition.
The vampire symbiote plants outgrowths from The common, asexual method is carried out through the host exposing its own saliva or blood to an open wound on the body of a living victim for an extended period of time. This occurs naturally when the host is feeding, only the chances of the symbiote through exposed saliva is usually very thin b