C reactive protein

C-reactive protein (CRP) is an acute-phase protein produced by the liver in response to inflammation. Measured in serum or plasma, CRP is one of the most widely used markers of systemic inflammation. It rises rapidly (within hours) in response to bacterial infections, autoimmune flares, tissue injury, and malignancy. High-sensitivity CRP (hs-CRP) at lower levels is used for cardiovascular risk stratification. CRP is valuable for monitoring treatment response in rheumatologic conditions, infections, and post-surgical recovery. Unlike ESR, CRP responds quickly to changes in inflammatory status.