Boston Criteria (febrile infant)
Boston criteria for the febrile infant 28-89 days (Baskin 1992).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age 28-89 days
- No
- Well-appearing
- No
- No focal source on exam
- No
- WBC < 20 x10^9/L
- No
- UA < 10 WBC/HPF
- No
- CSF < 10 WBC/mm^3
- No
- Chest x-ray clear or not obtained
- No
Result: Boston: 0 of 7 criteria met -> NOT eligible for outpatient ceftriaxone management per Baskin 1992.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- <7 criteria met
- Not eligible for outpatient ceftriaxone management per Baskin 1992.
- all 7 criteria met
- Eligible for outpatient ceftriaxone management per Baskin 1992.
What you enter
- Age 28-89 days
- Well-appearing
- No focal source on exam
- WBC < 20 x10^9/L
- UA < 10 WBC/HPF
- CSF < 10 WBC/mm^3
- Chest x-ray clear or not obtained
How this is calculated
Baskin MN, O'Rourke EJ, Fleisher GR. Outpatient treatment of febrile infants 28 to 89 days of age with intramuscular administration of ceftriaxone. J Pediatr. 1992;120(1):22-27. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.