Philadelphia Criteria (febrile infant)
Philadelphia criteria for the febrile infant 29-60 days (Baker 1993).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age 29-60 days
- No
- Well-appearing
- No
- WBC < 15 x10^9/L
- No
- Band:neutrophil ratio < 0.2
- No
- UA < 10 WBC/HPF and few bacteria
- No
- CSF < 8 WBC/mm^3 and Gram stain negative
- No
- Chest x-ray clear or not obtained
- No
- Stool studies normal or no diarrhea
- No
Result: Philadelphia: 0 of 8 criteria met -> NOT low risk per Baker 1993 (any failed criterion disqualifies).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- <8 criteria met
- Not low risk per Baker 1993 (any failed criterion disqualifies).
- all 8 criteria met
- Low risk; safe outpatient management without empiric antibiotic per Baker 1993.
What you enter
- Age 29-60 days
- Well-appearing
- WBC < 15 x10^9/L
- Band:neutrophil ratio < 0.2
- UA < 10 WBC/HPF and few bacteria
- CSF < 8 WBC/mm^3 and Gram stain negative
- Chest x-ray clear or not obtained
- Stool studies normal or no diarrhea
How this is calculated
Baker MD, Bell LM, Avner JR. Outpatient management without antibiotics of fever in selected infants. N Engl J Med. 1993;329(20):1437-1441. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.