A test that identifies either antigens or antibodies to diagnose an infection. No obvious signs or symptoms of illness or disease. Fluid made by the liver to help digest foods containing fat and cholesterol. A procedure in which a small piece of body tissue is removed for inspection by microscope to diagnose a disease or the stage of infection. Liquids produced by the body, such as blood, saliva, or semen.
Body fluids carry both useful and harmful substances.
A person who can give a disease to others, and who may or may not have any symptoms of that disease. It provides safety guidelines and information on human disease and other health topics. One of the forms of hepatitis that clears up within a few years, leaving many patients free of outward symptoms. However, patients remain carriers of the virus and still can transmit the disease without feeling sick themselves. A progressive disease of the liver where large amounts of scar tissue replace working liver tissue.