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C-Reactive Protein

Test Code



Testing performed on Beckman Coulter DxC 700 AU analyzing serum.

Test Utility

C-reactive protein is an acute phase reactant and is used as a sensitive and quantitative measure of the body's acute phase response. Increased CRP levels are consistently found in patients with acute bacterial and viral infections, rheumatoid arthritis, acute myocardial infarction, and widespread malignant disease.

Specimen Storage and Stability

Serum, free from hemolysis, Gold Top or Tiger SST, minimum 4.0mL, is recommended. When used to evaluate patients with arthritis, serum is preferred. Avoid lipemic samples which may produce excessively high scatter signals. Refrigerate at 2-8C.

Specimen Collection and Preparation

C-reactive protein specimens are stable for 11 days at 20-25C and 2 months at 4-8C in serum. For longer storage, freeze serum to -20C. However, please note that it has been reported that frozen specimens may give false or positive results.

Specimen Rejection

  • Improperly labeled

  • Specimen grossly

  • Hemolyzed uncentrifuged

Reference Ranges

< 0.5mg/dL


Monday - Saturday, 16 hours a day.

Result available after getting the specimen in 5 hours.

STAT results available within 2 hours of receipt in the Laboratory.

*NOTE: All Specimen Refrigerated (2-8°C) for 7 days only.


Vibra Health Laboratory

Phone: (248) 846-0663

1307 Allen Dr, Suite A, Troy, MI 48083

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