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Simple clinical score and laboratory-based method to predict bacterial etiology of acute diarrhea in childhood
M Fontana1, G Zuin, S Paccagnini
1Pediatric Department IV, University of Milan, Italy.
Insights
This study presents a two-step method to predict bacterial diarrhea in children. The approach effectively classifies patients, reducing the need for extensive stool cultures in pediatric practice.
Area of Science:
- Pediatrics
- Infectious Diseases
- Clinical Diagnostics
Background:
- Diarrhea is a common pediatric illness, with bacterial infections being a significant concern.
- Accurate identification of bacterial etiology is crucial for appropriate treatment and management.
- Current diagnostic methods, like stool culture, can be resource-intensive and may not be necessary for all cases.
Purpose of the Study:
- To develop and validate a predictive method for assessing the probability of bacterial etiology in pediatric diarrhea.
- To stratify patients into distinct risk groups (high, intermediate, low) for bacterial infection.
- To guide the judicious use of stool cultures in managing childhood diarrhea.
Main Methods:
- A two-step predictive model was developed, incorporating a clinical score and fecal leukocyte analysis.
- Patients were initially categorized into high, intermediate, or low probability groups based on clinical assessment.
- Individuals in the intermediate group were further classified using fecal leukocyte presence or absence.
Main Results:
- The predictive method demonstrated high accuracy in classifying patients in both development (86%) and validation (81%) cohorts.
- The two-step approach successfully differentiated children with a high probability of bacterial diarrhea.
- Fecal leukocytes proved valuable in refining risk stratification for the intermediate clinical score group.
Conclusions:
- The described two-step predictive method offers a reliable approach to identify children with a high likelihood of bacterial diarrhea.
- This strategy can help optimize the use of stool cultures, reserving them for selected cases.
- Implementation in pediatric practice may improve diagnostic efficiency and resource allocation for diarrhea management.
Abstract:
We describe a two-step predictive method to assess the probability of bacterial etiology in cases of diarrhea. The patients are divided into three probability groups (high, intermediate, low) according to a clinical score. Thereafter the patients in the intermediate group are further assigned to the high or low probability group according to the presence or absence of fecal leukocytes. We developed the method in an initial series of 157 children with acute diarrhea; the reproducibility of the method was tested in a second series of 180 cases. Eighty-six percent of patients in the first series and 81% in the second were correctly classified by our method. We suggest its use, especially in pediatric practice, to identify children with the highest probability of bacterial diarrhea, thus reserving stool culture to a few selected cases because only a minority of children with diarrhea have a recognized bacterial etiology.