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Use of Procalcitonin for Identification of Cobacterial Pneumonia in Pediatric Patients
Insights
Procalcitonin (PCT) effectively identifies bacterial pneumonia in children with viral respiratory infections. Other markers like temperature and white blood cell count were not significant predictors.
Area of Science:
- Pediatric Infectious Diseases
- Biomarker Research
- Respiratory Medicine
Background:
- Distinguishing bacterial pneumonia from viral respiratory infections in children is clinically challenging.
- Accurate diagnosis is crucial for appropriate antibiotic stewardship and patient outcomes.
- Procalcitonin (PCT) is a biomarker investigated for its potential role in bacterial infection detection.
Purpose of the Study:
- To assess the diagnostic utility of procalcitonin (PCT) in identifying concurrent bacterial pneumonia (cobacterial pneumonia) in pediatric patients presenting with a known viral respiratory infection.
- To compare the predictive value of PCT against traditional inflammatory markers.
Main Methods:
- A retrospective cohort study analyzed 374 pediatric patients admitted with upper respiratory tract infections.
- Procalcitonin (PCT) levels were measured, with values <0.5 ng/mL considered normal and >1.5 ng/mL suggestive of cobacterial pneumonia.
- Receiver-operator characteristic curves and logistic regression were employed to evaluate predictive variables.
Main Results:
- Cobacterial pneumonia was identified in 23% of pediatric patients.
- Median PCT levels were significantly higher in patients with cobacterial pneumonia (1.41 ng/mL initially, 4.55 ng/mL subsequently) compared to viral pneumonia (0.14 ng/mL initially, 0.26 ng/mL subsequently).
- Elevated PCT levels increased the odds of cobacterial pneumonia by 17.5 times (95% CI, 5.2, 59.1).
Conclusions:
- Procalcitonin (PCT) demonstrates a strong association with cobacterial pneumonia in pediatric patients with underlying viral respiratory infections.
- Traditional markers including temperature, white blood cell (WBC) count, and C-reactive protein were not significant predictors in differentiating between viral and cobacterial pneumonia.
Objective:
To evaluate the utility of procalcitonin (PCT) in identifying cobacterial pneumonia in pediatric patients with known viral respiratory infection.
Methods:
A retrospective cohort study was conducted in a stand-alone children's hospital during 2 time periods (period 1: October 1, 2014, to March 31, 2015; period 2: October 1, 2015, to March 31, 2016). Patients admitted with any upper respiratory tract infection were included. Exclusion criteria included any condition compromising lung function, age <30 days or >18 years, or lack of PCT (period 2). PCT values of <0.5 ng/mL were considered normal, whereas values of >1.5 ng/mL were used to identify cobacterial pneumonia. Receiver-operator characteristic curves were used with multiple logistic regression to evaluate patient variables.
Results:
Of the 374 pediatric patients evaluated, 64% were classified as having viral pneumonia and 23% as having cobacterial pneumonia across both study time periods. Non-significant predictors of cobacterial pneumonia included temperature (p = 0.0795, p = 0.1466), WBC count (p = 0.8774, p = 0.6675), and C-reactive protein (p = 0.7115, p = 0.3835). Median initial PCT for patients with viral pneumonia was 0.14 ng/mL compared with 1.41 ng/mL in patients with cobacterial pneumonia; median second PCTs were 0.26 ng/mL (viral pneumonia) and 4.55 ng/mL (cobacterial pneumonia). Patients with an elevated PCT had 17.5 times (95% CI, 5.2, 59.1) greater odds of having a cobacterial pneumonia.
Conclusions:
PCT was found to be strongly associated with cobacterial pneumonia with an underlying viral etiology. Temperature, WBC, and C-reactive protein failed to be significant predictors in differentiating between viral and cobacterial pneumonia.
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