Step-by-Step Approach

Sequential invasive-bacterial-infection risk stratification using appearance, age, urine, PCT, CRP, and ANC.

What is Step-by-Step Approach?

Step-by-Step Approach: Sequential invasive-bacterial-infection risk stratification using appearance, age, urine, PCT, CRP, and ANC. Active calculation. Popul…

Population and scope

Febrile Infant. Infants up to 90 days old with fever without source

Also searched as

Step-by-Step · step-by-step · febrile infant · step by step · lactante febril

Calculator available

This page has an active local calculator in PedsCore. Entered values are processed in the browser, with references, limits and interpretation shown alongside the result.

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Clinical use

This PedsCore page brings together clinical information, implementation status and available evidence for Step-by-Step Approach. It is intended for Infants up to 90 days old with fever without source. The tool belongs to Pediatric emergency and should be interpreted in the appropriate clinical context.

Interpretation and validation

Local Step-by-Step implementation for infants up to 90 days with fever without source. Classification is sequential: ill appearance, age ≤21 days, leukocyturia, or PCT ≥0.5 ng/mL = high risk; if those are negative, CRP >20 mg/L or ANC >10,000/mm³ = intermediate risk; if all are negative = low risk.

PedsCore does not replace clinical judgement. Scores, rules and calculators are presented with evidence traceability and a visible implementation status.

Clinical review and maintenance

Implementation review and independent clinical review are shown separately. PedsCore does not attribute named reviewers or external endorsement without a public record supporting the claim. The repository preserves source, change and test history.

Editorial transparency

This page is part of an open-source project. Evidence level, implementation status, validation notes and sources are shown explicitly. It currently contains 2 catalog references. Content and calculation changes are reviewed through the public repository, automated tests and version traceability.

The absence of an active calculator is not a clinical recommendation: some tools remain reference-only while source, licensing, exact variant or validation still require review.

Each page lets you verify what is being assessed, which population the tool describes, whether local calculation is available, which limitations remain open and which references support implementation. This context matters when different publications, versions or adaptations share a similar name but are not interchangeable.