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. 2002 Apr;86(4):282–285. doi: 10.1136/adc.86.4.282

Procalcitonin as a diagnostic marker of meningococcal disease in children presenting with fever and a rash

E Carrol 1, P Newland 1, F Riordan 1, A Thomson 1, N Curtis 1, C Hart 1
PMCID: PMC1719162  PMID: 11919107

Abstract

Background: Procalcitonin (PCT), a precursor of calcitonin, is a recognised marker of bacterial sepsis, and high concentrations correlate with the severity of sepsis. PCT has been proposed as an earlier and better diagnostic marker than C reactive protein (CRP) and white cell count (WCC). This comparison has never been reported in the differentiation of meningococcal disease (MCD) in children presenting with a fever and rash.

Aim: To determine if PCT might be a useful marker of MCD in children presenting with fever and rash.

Methods: PCT, CRP, and WCC were measured on admission in 108 children. Patients were classified into two groups: group I, children with a microbiologically confirmed clinical diagnosis of MCD (n = 64); group II, children with a self limiting illness (n = 44). Median ages were 3.57 (0.07–15.9) versus 1.75 (0.19–14.22) years respectively. Severity of disease in patients with MCD was assessed using the Glasgow Meningococcal Septicaemia Prognostic Score (GMSPS).

Results: PCT and CRP values were significantly higher in group I than in group II (median 38.85 v 0.27 ng/ml and 68.35 v 9.25 mg/l; p < 0.0005), but there was no difference in WCC between groups. Sensitivity, specificity, and positive and negative predictive values were higher for PCT than CRP and WCC. In group I, procalcitonin was significantly higher in those with severe disease (GMSPS ≥8).

Conclusions: PCT is a more sensitive and specific predictor of MCD than CRP and WCC in children presenting with fever and a rash.

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Figure 1 .

Figure 1

Box and whisker plot showing median, quartiles, and extreme values (log10) for WCC, CRP, and PCT. Box represents the interquartile range, and the whiskers extend from the lowest to the highest values, excluding outliers. Outliers are shown as Δ.

Figure 2 .

Figure 2

ROC plot comparing CRP and PCT as diagnostic markers of MCD in children presenting with fever and a rash.

Figure 3 .

Figure 3

Scatter plot of CRP versus PCT values. Axis taken back to -100 to allow better demonstration of spread of points around zero.

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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