Human body fluids that are considered potentially contagious are amniotic fluid, cerebrospinal fluid, pericardial fluid, peritoneal fluid, pleural fluid, saliva, semen, synovial fluid, vaginal secretions, any body fluid that is contaminated with blood, and all body fluids where it is difficult to differentiate among body fluids. Infectious material also refers to unfixed tissue or organ from a human (living or dead), cell or tissue cultures containing human immunodeficiency virus (HIV) and blood, and organs or tissues from animals infected with HIV or hepatitis B virus (HBV).