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ID:71 C-Reactive Protein (CRP)
Search Links: General Info : Protocols : LabTestsOnline

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.

TubeSerum or Heparin
Tube Picture
Collection ConditionsUse Gold top (serum gel) tube except for Intensive care units, renal unit, transplant unit, patients on IV heparin (use Green/Yellow top tube for these patients).
Min. Vol2 mL

Ref. Range (Male)<10
Ref. Range (Female) <10
Ref. Range (Paed)
Ref. Range Notes
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. Review due on 21/06/2017 11:54:57. Published By Sylvia Bennett on 21/06/2016 11:54:57.