Count Yorga, Vampire

Count Yorga, Vampire is a movie starring Robert Quarry, Roger Perry, and Michael Murphy. A couple invites a Count from Hungary, who recently immigrated to America, to conduct a seance for the woman's recently deceased mother,...
Sixties couples Michael and Donna and Paul and Erica become involved with the intense Count Yorga at a Los Angeles séance, the Count having latterly been involved with Erica's just-dead mother. After taking the Count home, Paul and Erica are waylayed, and next day a listless Erica is diagnosed by their doctor as having lost a lot of blood. When she is later found feasting on the family cat the doctor becomes convinced vampirism is at work, and that its focus is Count Yorga and his large isolated house.