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The Quantitative C-Reactive Protein (CRP) test measures the precise concentration of CRP — an acute-phase protein produced by t...
Also known as: CRP Test · C Reactive Protein Blood Test · Quantitative CRP · High-Sensitivity CRP (hs-CRP) · Inflammation Blood Test
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*Inclusive of home collection charges
The Quantitative C-Reactive Protein (CRP) test measures the precise concentration of CRP — an acute-phase protein produced by the liver within hours of tissue damage, infection, or inflammation — in the blood. CRP is the most sensitive and rapidly responding marker of systemic inflammation available in routine clinical practice. It rises within 6–8 hours of an inflammatory stimulus, peaks at 36–50 hours, and returns to normal within days of resolution — making it far more useful than ESR for monitoring acute infections and treatment response. The quantitative CRP provides an exact numerical value for precise clinical management. No fasting required.
Key benefits of this package include:
What Does the C-Reactive Protein (CRP) Test — Quantitative Measure?
| Level / Result | Possible Interpretation |
|---|---|
| < 5 mg/L (Normal) | No significant systemic inflammation — normal CRP |
| 5–20 mg/L (Mild elevation) | Mild inflammation — viral infection, minor bacterial infection, tissue injury, or early autoimmune flare |
| 20–100 mg/L (Moderate elevation) | Significant inflammation — moderate bacterial infection, significant autoimmune disease activity, post-surgical response |
| > 100 mg/L (Severe elevation) | Severe bacterial infection or sepsis — urgent medical evaluation and treatment required |
| > 200 mg/L (Very severe) | Overwhelming bacterial sepsis, severe tissue necrosis, or hyperinflammatory state — critical care setting |
| hs-CRP < 1 mg/L (Cardiovascular) | Low cardiovascular risk from inflammatory pathway |
| hs-CRP 1–3 mg/L (Cardiovascular) | Average cardiovascular risk — lifestyle optimisation recommended |
| hs-CRP > 3 mg/L (Cardiovascular — not acutely ill) | Elevated cardiovascular risk — consider statin therapy, lifestyle modification, further cardiological assessment |
Important Note: CRP is sensitive but not specific — it rises in any inflammatory condition and cannot identify the cause. Very high CRP (> 100 mg/L) strongly favours bacterial rather than viral infection. CRP must be interpreted alongside clinical history, symptoms, white cell count, and targeted investigations. For cardiovascular risk assessment using hs-CRP, acute illness must be excluded — an elevated hs-CRP due to active infection does not reflect cardiovascular risk. All results must be reviewed by a physician.
CRP vs. ESR — Fast vs. Slow Inflammation Marker: CRP and ESR both measure inflammation but differ critically in kinetics. CRP rises within 6–8 hours and normalises within 4–7 days of resolution — making it superior for: acute infection monitoring, distinguishing bacterial from viral illness, and assessing treatment response within days. ESR rises slowly (24–48 hours) and remains elevated for weeks after resolution — making it superior for: monitoring chronic inflammatory conditions (RA, PMR), TB surveillance, and detecting indolent disease over time. Together, CRP and ESR provide complementary acute and chronic inflammatory information.
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Trusted by millions of Customers across South India — these are the tests our doctors recommend most.
Screens for anaemia, infections, and immune health
