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C-reactive protein in acute otitis media.
Pediatric Infectious Disease
|September 1, 1986
Summary
C-reactive protein (CRP) levels in children with acute otitis media (AOM) were evaluated. Elevated CRP did not reliably distinguish bacterial AOM, suggesting it is not useful for guiding antibiotic treatment decisions.
Area of Science:
- Pediatrics
- Infectious Diseases
- Clinical Diagnostics
Background:
- Acute otitis media (AOM) is a common childhood infection.
- Differentiating bacterial AOM from viral or sterile cases is crucial for appropriate antibiotic use.
- Biomarkers like C-reactive protein (CRP) are investigated for diagnostic utility.
Purpose of the Study:
- To determine if serum C-reactive protein (CRP) levels aid in the etiologic diagnosis of acute otitis media (AOM) in children.
- To assess the diagnostic accuracy of CRP in identifying bacterial AOM.
- To evaluate the utility of CRP in guiding antimicrobial therapy decisions for AOM.
Main Methods:
- Serum CRP levels were measured using radial immunodiffusion in 67 children with AOM and 67 controls.
- AOM cases were categorized based on bacterial culture results from middle ear fluid.
- CRP concentrations were compared between bacterial AOM, sterile AOM, and control groups.
Main Results:
- CRP levels were elevated in both bacterial (71% > 15 mg/liter) and sterile (67% > 15 mg/liter) AOM cases.
- CRP > 15 mg/liter showed a sensitivity of 72% but low specificity (33%) for bacterial AOM.
- The predictive value of a positive CRP test was 66%, and a negative test was 40%.
Conclusions:
- Serum CRP levels are not sufficiently specific to differentiate bacterial from non-bacterial acute otitis media in children.
- CRP measurement should not be the sole basis for initiating antimicrobial therapy in pediatric AOM cases.
- Further research may explore combinations of markers or different diagnostic approaches for AOM.