If your doctor suspects you have one of several diseases, they may want to perform an “enzyme-linked immunosorbent assay” test. This is more commonly known as an ELISA test, and it can help to confirm ...

Your doctor may recommend the creatine phosphokinase (CPK) test if there's a need to measure CPK enzyme levels in your blood. The cells in your body require this creatine kinase enzyme to generate ...

In 1985, graphic novelist Alison Bechdel came up with criteria for whether she'd watch a movie. It's become known as the Bechdel test, and it's surprisingly hard for films to pass these days. After ...

Doctors may order a cyclic citrullinated peptide (CCP) antibody test and other exams to confirm or rule out a rheumatoid arthritis (RA) diagnosis. A positive CCP antibody test doesn’t necessarily mean ...

Antigen tests can identify the presence of antigens within the body, which are substances that cause immune responses, such as the release of antibodies. The immune system, and antibodies specifically ...

A polymerase chain reaction (PCR) test detects genetic material from a pathogen or abnormal cell sample. Ways of collecting samples include a nasal swab, a saliva swab, or taking a sample of blood.