Can you become a werewolf by being bit by one?

There are many theories as to how one can turn into a vampire. In the Twilight Series the venom caused the change therefore a single drop would kill.

In most theories, a person must exchange blood with a vampire and then killed with their blood (the vampires) in them. Other theories say that a person must be drained of all their blood except for the last drop, which then they would need a bit of vampire blood to survive. In the end they all turn.