C-reactive protein (CRP) Serum < 1 mg/dl Used as a nonspecific indicator of infection or inflammation To monitor the response to antibiotic or anti-inflammatory medication To help with the diagnosis of Rheumatoid Arthritis and Rheumatic Fever Rheumatoid Arthritis Rheumatic Fever Systemic Lupus Erythematosus Bacterial Sepsis Tuberculosis Pneumococcal Pneumonia Crohn's Disease Myocardial Infarction Oral contraceptives Intrauterine device Hemolysis