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C-Reactive Protein (CRP)


This procedure measures the rate of decrease in light intensity due to immune-complex formation.

Test Utility

C-reactive protein (CRP) levels increase when there's inflammation in the body. Inflammation can be due to injury, infection, or chronic disease.

Specimen Collection and Preparation

Serum sample in the following tubes:

  • Serum separator tube (gold or tiger top)

Specimen Storage and Stability

Store serum at the following temperatures:

  • Room temperature: 20°C to 25°C for up to 11 days

  • Refrigerated: 4°C to 8°C for up to 2 months

  • Frozen: -20°C or lower. Please note that frozen samples may produce false-positive results.

Specimen Rejection

  • Insufficient sample volume

  • Sample not stored at proper temperature

  • Frozen whole blood

  • Severely hemolyzed samples

  • Severely lipemic specimens

  • Specimen labeled incorrectly or not labeled

Reference Pages


Monday – Saturday

Result available within 24 hours of receipt in laboratory

NOTE: Specimens are refrigerated (2-8°) for 7 days before disposal

STAT results available within 2 hours of receipt in the laboratory


Vibra Health Laboratory

1307- A, Allen Dr

Troy, MI 48083

(248) 846-0663

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