A C-Reactive Protein (CRP) Quantitative test is used to aid in the diagnosis of infections or diseases which cause inflammation. CRP is a protein produced by the liver. Higher than normal concentrations of CRP are often an indicator of infection or inflammation in the body. This test can help determine if an infection is present but not the source of the infection. Condition which can cause elevated CRP levels include but are not limited to Sepsis, Pelvic Inflammatory Disease, Arthritis, Lupus, Vasculitis, and Inflammatory Bowel Disease. This test is most effective at detecting elevated levels of CRP. A cardiac CRP test (also offered by this site) may be more appropriate for someone who is checking CRP levels to assess their risk for heart disease. Cardiac CRP test can detect lower levels of CRP which may indicate an increased risk for events like heart attack or stroke.