C-REACTIVE PROTEIN (QUALITATIVE), SERUM

C-Reactive Protein (Qualitative), Serum

What it is

The C-Reactive Protein (CRP) Qualitative test is a blood test that detects the presence of CRP in the serum. CRP is a protein produced by the liver in response to inflammation. Unlike quantitative CRP tests that provide exact levels, the qualitative test simply indicates whether CRP is present (positive) or absent (negative), making it useful for rapid screening of inflammatory conditions.

Uses

This test is used to detect acute or chronic inflammation, infection, and certain autoimmune disorders. It helps doctors quickly identify if an inflammatory process is occurring in the body. The test is also sometimes used to monitor treatment response in conditions such as infections, rheumatic diseases, or post-surgical recovery.

Symptoms That May Lead to the Test

Doctors may order this test if you present with fever, joint pain, unexplained swelling, persistent fatigue, body aches, or symptoms suggestive of infection or inflammatory disease. It is also sometimes used in patients suspected of having rheumatic fever or autoimmune conditions like rheumatoid arthritis or lupus.

Abnormal Results

Positive CRP (Qualitative): Indicates the presence of inflammation or infection. Causes may include bacterial or viral infections, autoimmune disorders, tissue injury, or inflammatory diseases.

Negative CRP (Qualitative): Suggests no significant inflammation at the time of testing. However, it does not completely rule out disease, and further tests may be needed depending on clinical symptoms.

Risks

The test involves a routine blood draw with minimal risks. These include slight discomfort, bruising, or dizziness at the needle site, which typically resolve quickly.