Blood borne pathogens are bacteria, viruses and other microorganisms that live in the bloodstream and can cause disease. They are found in blood, semen, vaginal secretions, cerebrospinal fluid, fluid in the chest and joints and oral secretions during dental procedures. Any human tissue, alive or dead can carry these pathogens. Hepatitis B, hepatitis C and the human immunodeficiency virus (HIV) are the most common blood borne pathogens.
