Thermometer Pediatric FeverIn part 3 of this “Pediatric Fever Without a Source” Paucis Verbis cards, we now cover febrile infants 3 months to 3 years old (PV cards for birth-28 days and 29 days-3 months old).


  • The algorithm below is a guideline for NON-toxic patients. More ill-appearing children require a more broad workup.
  • For the under-immunized (<2 PCV immunizations) and temperature ≥39.5C, blood cultures may be falling out of favor in the near future, because the incidence of blood culture contaminants is close to exceeding the true incidence of occult bacteremia.

PV Card: Pediatric Fever Without a Source (3 Months-3 Years)

Go to ALiEM (PV) Cards for more resources.

Thanks to Dr. Hemal Kanzaria (UCSF-SFGH resident) for helping design this PV card and Dr. Christine Cho, Dr. Andi Marmor, and Dr. Ellen Laves (UCSF Pediatrics) for the content.

Michelle Lin, MD
ALiEM Founder and CEO
Professor and Digital Innovation Lab Director
Department of Emergency Medicine
University of California, San Francisco
Michelle Lin, MD


Professor of Emerg Med at UCSF-Zuckerberg SF General. ALiEM Founder @aliemteam #PostitPearls at Bio:
Michelle Lin, MD