Plasma lipid profiles discriminate bacterial from viral infection in febrile children

Area of Science:

• Biochemistry
• Clinical Medicine
• Pediatrics

Background:

• Fever is a common pediatric emergency department presentation.
• Differentiating bacterial from viral infections is clinically challenging due to non-specific symptoms.
• Host-response 'omics' approaches show promise for identifying infection biomarkers.

Purpose of the Study:

• To investigate lipidomic profiles in febrile children with confirmed bacterial versus viral infections.
• To identify potential lipid biomarkers for distinguishing between bacterial and viral infections.
• To assess the diagnostic potential of these biomarkers in a pediatric population.

Main Methods:

• Plasma samples from 40 febrile children (20 bacterial, 20 viral infections) were analyzed using lipidomic techniques.
• Comparative analysis of lipid species between bacterial and viral infection groups was performed.
• Receiver operating characteristic (ROC) curve analysis was used to evaluate diagnostic performance.

Main Results:

• Distinct lipidomic profiles were observed between bacterial and viral infections in children.
• Specific lipid species (e.g., glycerophosphoinositol, sphingomyelin, lysophosphatidylcholine, cholesterol sulfate) were elevated in viral infections.
• Other lipids (e.g., fatty acids, glycerophosphocholine, glycerophosphoserine, lactosylceramide, bilirubin) were lower in viral infections compared to bacterial infections.
• A combination of three lipids achieved a high diagnostic accuracy (ROC curve area of 0.911).

Conclusions:

• Lipidomic analysis can differentiate between bacterial and viral infections in febrile children.
• Metabolic biomarkers hold potential for aiding clinical diagnosis and management decisions.
• This approach may help limit the inappropriate use of antibiotics in pediatric febrile illnesses.