Laboratory test
CRP
Other names and abbreviations: C-reactive protein
A marker of inflammation in the body. It rises quickly with bacterial infections and injuries.
CRP is produced by the liver in response to inflammation. The result helps distinguish a bacterial from a viral infection and monitor treatment. A raised CRP alone doesn't show where the inflammation is.
Typical ranges in adults
| Parameter | Typical range | What a deviation may mean |
|---|---|---|
| CRP | below 5 mg/l | several dozen or more: more often a bacterial infection or another acute inflammation |
The ranges are approximate and differ between laboratories; they also depend on age, sex and pregnancy. A result outside the range doesn't always mean illness – discuss it with a doctor.
When it is done
With fever, suspected infection, in rheumatic diseases, to assess how well treatment is working.
How to prepare
Usually no special preparation is needed. In the morning before the blood draw, it's best not to eat a heavy breakfast – ask at reception.
