• Dr. Kaitlin Dupuis MD CCFP

Do You Know This Must-Ask Croup Question?


1. List five differential diagnoses, other than croup, that may cause stridor in a child.

2. What is the most common causative organism responsible for croup?

3. What is the primary management priority for a patient with suspected croup?

4. List three treatments for suspected mild croup (if medications, give route, dose and frequency)

Infectious respiratory illnesses, such as croup, peak in the fall and winter...but don’t get tricked by a SAMP stem involving stridor in a child if the season is mentioned! Make sure to rule out foreign body ingestion, a commonly overlooked differential diagnosis for stridor in a child.


1. a) Foreign body ingestion

b) Epiglottitis

c) Congenital airway anomalies

d) Retropharyngeal abscess

e) Upper airway injury

2. Parainfluenza virus type 1

3. Airway protection

4. a) Fever control with acetaminophen 15mg/kg PO/PR q 6h PRN

b) Dexamethasone 0.15-0.6 mg/kg PO x 1 dose

c) Oral fluid hydration

As well, check out Dr. Dupuis' other blog post on Croup to learn other viruses that cause croup, and other important management steps!

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The only Canada-Wide CCFP exam course - created by two Family Doctors who wished this existed when we were residents, and are on a mission to help CCFP exam candidates. Disclosures: The Review Course founders have no conflicting commercial interests. As is the case with any private events hosted on a university campus or hospital, this event is not affiliated with nor endorsed by the host venues. Our materials are peer-reviewed and prepared by Canadian physicians; we do not guarantee that our preparation materials are representative of any Canadian examination and we do not provide questions from any other examination nor are they intended as medical advice. The College of Family Physicians of Canada does not affiliate with nor endorse any exam preparation course.