Scope of this summary
Children from birth through 59 months presenting with measured or reported fever. The current sources are Children’s Hospital of Philadelphia institutional pathways, not a national federal or AAP traffic-light guideline. Infants 56 days or younger require the dedicated febrile-infant pathway; immunocompromise, central lines, major chronic disease, recent surgery and a concerning travel exposure can place any child outside a routine fever pathway.
The Bottom Line
- Begin with appearance and physiology rather than temperature height alone: airway or breathing compromise, poor perfusion, altered interaction, petechiae or purpura, dehydration or a positive sepsis screen requires immediate stabilization and senior assessment.
- Use exact age in days for young infants. A well-appearing infant 56 days or younger still needs a structured febrile-infant assessment because history and appearance cannot reliably exclude invasive bacterial infection.
- For children older than 56 days through 24 months, seek a recognizable bacterial or viral source, assess urinary-tract-infection probability, consider occult pneumonia when respiratory findings justify it and account for immunization status.
- For children older than 24 months, direct testing from history and examination rather than ordering a uniform panel. Most uncomplicated viral illnesses need supportive care, not empiric antibiotics or routine laboratory testing.
- A safe outpatient decision requires improving or acceptable physiology, adequate hydration, a caregiver able to observe the child, explicit return precautions and reliable access to follow-up and pending results.
Practical clinical workflow
1
Confirm the highest measured temperature, method, duration and antipyretic timing; record immunizations, exposures, travel, focal symptoms, intake, urine output, medicines, underlying disease and prior healthcare or antibiotic exposure.
2
Perform a sepsis screen and full age-appropriate examination, including mental state, work of breathing, circulation, skin, hydration, neck, ears, mouth, lungs, abdomen, joints and neurologic findings while using infection-control precautions indicated by symptoms and travel.
3
Route infants 56 days or younger to the local febrile-infant algorithm. In older infants and children, order urine, respiratory, blood, cerebrospinal-fluid or imaging studies only when age, examination, source probability and illness severity support them.
4
Treat the identified source with current local antimicrobial guidance when bacterial infection is likely; otherwise support fluids and comfort, and do not use response to an antipyretic as proof that serious illness is absent.
5
Before discharge, reassess observations, breathing, perfusion, interaction and oral intake; assign ownership for culture follow-up and tell caregivers exactly when and where to return if the child worsens.
Safety boundaries and escalation
- Any fever in a neonate or very young infant warrants prompt clinician-directed evaluation; do not apply the older-child outpatient branch simply because the infant looks well after feeding or antipyretic medicine.
- Meningeal signs can be absent in infants. Bulging fontanelle, inconsolability, marked lethargy, seizure, focal neurologic change, rapidly progressive rash or shock requires immediate invasive-infection and meningitis assessment.
- Bilious vomiting, a surgical abdominal examination, focal bone or joint pain, refusal to bear weight, respiratory failure or suspected toxic ingestion needs an alternative emergency pathway rather than a generic fever label.
- Children with sickle cell disease, asplenia, immune suppression, indwelling vascular devices or incomplete immunization may need cultures, empiric treatment and admission thresholds different from the routine pathway.
Localization
CHOP’s March 2026 all-settings pathway and December 2025 febrile-infant pathway provide current, transparent institutional examples; clinicians must use their own hospital age bands, laboratory thresholds, antibiogram and follow-up system.
Source documents
Use the linked source documents for complete recommendations, evidence grading, exclusions and implementation detail.
- Children's Hospital of PhiladelphiaFever Clinical Pathway — All SettingsPosted October 2018; last revised March 2026 · updated 2026-03-01 · accessed 2026-08-20view source
- Children's Hospital of PhiladelphiaFebrile Infant Clinical Pathway — Emergency Department and InpatientInfants 56 days or younger; last revised December 2025 · updated 2025-12-01 · accessed 2026-08-20view source
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