CD Diagnostics is developing a series of immunoassays to detect the cause of joint pain using joint fluid. An immunoassay is a test that measures the presence of a substance. This is a proven technology that has been well established in the medical community for many years. A very common example of an immunoassay is an over-the-counter home pregnancy test, which detects the presence of human chorionic gonadotropin. Our immunoassays use a small sample of a patient’s joint fluid (called synovial fluid) to measure the presence of proteins (also known as biomarkers) that are produced by the body and are specific to a particular joint disease. The presence of these biomarkers in elevated levels indicates that the patient is reacting to a specific joint disease and serves as a positive diagnosis. Results are very accurate and available within five to ten minutes. Our first immunoassay will be for joint infection because this is a very serious condition that must be ruled out with any joint disease. Tests for other joint diseases are in development.