Synovial Fluid C-Reactive Protein as a Biomarker in Osteoarthritis, Immune-Mediated Polyarthritis and Bacterial Infective Arthritis
🔍 Key Findings
- Synovial CRP was significantly lower in osteoarthritis than both IMPA and bacterial infective arthritis (p=0.001 for both comparisons).
- Synovial CRP could not differentiate IMPA from bacterial infective arthritis (p=0.721), limiting its value as a stand-alone diagnostic test.
- Median synovial CRP concentrations were 0.2 mg/L (OA), 65.79 mg/L (IMPA), and 60.8 mg/L (infective arthritis).
- Synovial CRP is useful for distinguishing inflammatory from non-inflammatory arthropathies, but not infectious from sterile inflammatory disease.
- Synovial neutrophil count positively correlated with synovial CRP in IMPA and infective arthritis, supporting CRP as a marker of joint inflammation.
- Serum and synovial CRP showed a moderate positive correlation in IMPA cases (r=0.52), although not statistically significant.
- Higher synovial CRP was associated with increased lameness severity in osteoarthritis (r=0.91, p=0.004).
- Diagnosis of bacterial infective arthritis remains multifactorial, requiring integration of history, cytology, culture, and treatment response rather than CRP alone.
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🔍 Key Findings
- Synovial CRP was significantly lower in osteoarthritis than both IMPA and bacterial infective arthritis (p=0.001 for both comparisons).
- Synovial CRP could not differentiate IMPA from bacterial infective arthritis (p=0.721), limiting its value as a stand-alone diagnostic test.
- Median synovial CRP concentrations were 0.2 mg/L (OA), 65.79 mg/L (IMPA), and 60.8 mg/L (infective arthritis).
- Synovial CRP is useful for distinguishing inflammatory from non-inflammatory arthropathies, but not infectious from sterile inflammatory disease.
- Synovial neutrophil count positively correlated with synovial CRP in IMPA and infective arthritis, supporting CRP as a marker of joint inflammation.
- Serum and synovial CRP showed a moderate positive correlation in IMPA cases (r=0.52), although not statistically significant.
- Higher synovial CRP was associated with increased lameness severity in osteoarthritis (r=0.91, p=0.004).
- Diagnosis of bacterial infective arthritis remains multifactorial, requiring integration of history, cytology, culture, and treatment response rather than CRP alone.
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