Materials that could be potentially infected with bloodborne pathogens, even if they are not visibly mixed with human blood, include the following:

• Certain human body fluids such as semen, vaginal secretions, cerebrospinal fluid, synovial fluid, pleural fluid, pericardial fluid, peritoneal fluid, amniotic fluid, and saliva during dental procedures.
• Any body fluid that is visibly contaminated with blood.
• All body fluids in situations where it is difficult or impossible to differentiate between body fluids.
• Any unfixed human tissue or organ other than intact skin.
• HIV- or HBV-containing cell or tissue cultures, culture media, or other solutions.
• Blood, organs, or other tissues from experimental animals infected with HIV or HBV.

Other materials that may be contaminated with bloodborne pathogens include contaminated items such as test tubes, needles, syringes, tubing, culture dishes, gloves, and other personal protective equipment if exposed to these infectious materials.

Substances like sweat, tears, saliva, feces, nasal secretions, urine, or vomitus are generally not considered to carry bloodborne pathogens unless visibly contaminated with blood, although they can transmit other infectious diseases.