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C-reactive protein in acute otitis media
Insights
Serum C-reactive protein (CRP) levels in children with acute otitis media (AOM) were analyzed. Higher CRP indicated a greater likelihood of major pathogens like S. pneumoniae or H. influenzae, though clinical correlation was limited.
Area of Science:
- Pediatrics
- Infectious Diseases
- Clinical Chemistry
Background:
- Acute otitis media (AOM) is a common childhood infection.
- Biomarkers like C-reactive protein (CRP) can aid in diagnosis and management.
- Understanding CRP levels in AOM is crucial for effective treatment strategies.
Purpose of the Study:
- To investigate the relationship between serum C-reactive protein (CRP) levels and the presence of pathogens in children with acute otitis media (AOM).
- To explore potential correlations between CRP levels and clinical parameters in AOM.
Main Methods:
- Serum CRP levels were measured in 79 children diagnosed with AOM.
- CRP levels were categorized (<10 mg/l, ≥20 mg/l, ≥40 mg/l).
- Association between CRP levels and identified pathogens (S. pneumoniae, H. influenzae) was analyzed.
Main Results:
- Higher CRP levels (≥20 mg/l and ≥40 mg/l) were significantly more frequent in AOM cases caused by S. pneumoniae or H. influenzae compared to those without major pathogens (p<0.01 and p<0.001).
- Statistically significant correlations between CRP and clinical parameters were infrequent, but a trend towards higher CRP with a more severe clinical picture was observed.
- AOM cases with very high CRP (≥100 mg/l) were associated with bilateral infections, major pathogens, preceding respiratory infections, high fever, and significant middle ear effusion, but did not show different overall morbidity.
Conclusions:
- Serum CRP levels can be a useful indicator for the presence of major bacterial pathogens in acute otitis media.
- While CRP correlates with severe clinical presentation, its direct correlation with specific clinical parameters in AOM is limited.
- Elevated CRP in AOM warrants consideration of bacterial etiology, particularly in severe cases.
Abstract:
Serum C-reactive protein (CRP) levels were studied in 79 children with acute otitis media (AOM), aged from 4 months to 5 years. The CRP was less than 10 mg/l in 27 children, greater than or equal to 20 mg/l in 34, and greater than or equal to 40 mg/l in 17 children, 25 of the 41 attacks caused by S. pneumoniae or H. influenzae showed a CRP of greater than or equal to 20 mg/l and 15 CRP greater than or equal to 40 mg/l, in 38 cases without major otitis pathogens, the respective figures were 9 (p less than 0.01) and 2 (p less than 0.001). Although statistically significant correlations between otitis-related clinical parameters and CRP levels were rare, there was a tendency toward higher CRP values among those with a more severe clinical picture. All five attacks with CRP greater than or equal to 100 mg/l were bilateral, caused by major pathogens, and preceded by a respiratory infection. They also tended to have high fever and a large amount of fluid in myringotomy. However, even in these the general course of AOM and other morbidity was not different from the others.