A-307 Clinical utility of serum calprotectin in febrile infants presenting to the Emergency Department
Notice bibliographique
Résumé
Abstract Background Antimicrobial stewardship involves a delicate balance between the risk of undertreating individuals and the potential societal burden of overprescribing antimicrobials. However, early and accurate diagnosis of bacterial infections in critically ill patients is challenging, as the clinical manifestation is non-specific. Furthermore, the results from microbial cultures may be delayed, resulting in delayed antibiotic treatment, which is associated with increased mortality. Neutrophil activation is a major response to bacterial infection and calprotectin is the most abundant protein in the cytosolic fraction of neutrophils, shown as an early marker for neutrophil activation. The objective of this study was to evaluate the clinical performance of serum calprotectin in identifying bacterial infection in febrile infants presenting to an Emergency Department (ED) relative to other common biomarkers of infection. Methods 141 infants aged 28-90 days with suspected infectious disease presenting to the ED at The Hospital for Sick Children in Toronto, were included in this non-interventional investigation. All biomarkers except calprotectin were used in the routine clinical adjudication of the final diagnosis. Residual serum specimens collected as part of the standard care pathway were stored at -80°C prior to analysis of serum calprotectin using GCAL® assay (Gentian AS, Norway). Chart review was completed for key variables including, age (days), sex, chief complaint and temperature at ED presentation, and available laboratory test results (i.e., C-reactive protein and procalcitonin (Architect, Abbott Diagnostics), WBC count and neutrophil count (XN3000, Sysmex Europe GmbH), urinary leukocytes and nitrates, blood and/or urine bacterial culture). Final diagnosis, admission status, and antibiotic prescription at ED discharge were also extracted. Results Final discharge diagnosis in patient population included bacterial infection (n=23), viral infection (n=22), fever of unknown source (n=54) and other/unknown diagnosis (n=42). Antibiotics were prescribed in 36 cases, although bacterial infection could only be confirmed in 23 cases when final diagnosis was made. Statistically significant differences were observed in serum calprotectin (p<0.001), procalcitonin (p<0.001), and CRP (p<0.001) in patients with bacterial infections compared to patients with other discharge diagnoses. ROC curve analysis was performed for the identification of bacterial infections in the entire clinical cohort (n=141) and in only patients with laboratory confirmed bacterial or viral infection (n=41). Calprotectin and procalcitonin showed higher specificity than CRP and WBC count for differentiation between bacterial and viral infection in both cohorts. Performance of calprotectin in detection of bacterial infections was comparable to the performance of CRP, slightly better than performance of procalcitonin and superior to WBC count. Conclusions In this cohort, one third of the children that were prescribed antibiotics did not have confirmed bacterial infection. Hence, there is a need for adequate diagnostic tools to help discriminate between various kinds of infections. This study confirms serum calprotectin as a valuable biomarker for differentiation between types of infection and estimation of disease severity in febrile infants. Access to fast and accurate analysis of circulating calprotectin, combined with good clinical performance has the potential to make this biomarker a valuable complement to the current diagnostics of patients with bacterial infections and sepsis.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,002 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,002 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».