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ID:71 C-Reactive Protein (CRP)
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DescriptionAn acute phase protein synthesised in the liver.
IndicationDetection and monitoring of inflammatory disease. Distinguishing between bacterial and viral infections.
Additional InfoA normal CRP does not rule out inflammatory disease. A greater increase in CRP is seen with rheumatoid arthritis, vasculitis, trauma and certain malignant conditions. Less change occurs with ulcerative colitis, SLR, viral illness and osteoarthritis. Bacterial versus viral : A CRP >100 mg/L is suggestive of bacterial infection. In children with suspected meningitis a CRP >25mg/L is indicative of bacterial meningitis.
Concurrent Testsna
Dietary Requirementsna

InterpretationAn increase to 10 - 40mg/L can occur with mild inflammatory or viral infections. In acute or significant inflammation or bacterial infections CRP >40 mg/L.

Ref. Range (Male)<10
Ref. Range (Female) <10
Ref. Range (Paed)
Ref. Range Notes
Unitsmg/L


IP Acute TATRefer to Website
IP Routine TATRefer to Website
GP Acute TAT- Contact Laboratory
GP Routine TATRefer to Website
Turnround CommentMinimum retest interval = 24 hours
Originally edited by : MC. Last edited on 21/06/2017 11:54:57. Published By Sylvia Bennett on 21/06/2016 11:54:57.