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Measles — MCCQE Part 1 MCQ

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EasyRash in ChildMeaslesMCCQE Part 1

A 5-year-old newcomer with incomplete vaccination has fever, cough, coryza, conjunctivitis, Koplik spots and a descending maculopapular rash. Which of the following is the most appropriate next step?

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Correct answer: A — Isolate and notify public health while arranging diagnostic testing

Isolate and notify public health while arranging diagnostic testing is the single best answer because the age, timing, examination findings and investigations in the vignette fit Measles better than the alternatives. The most tempting distractor is less appropriate because it either treats a neighbouring presentation, delays a time-critical intervention, or ignores a key discriminator in the stem. The remaining options are suboptimal because they would miss the diagnosis, use an investigation or treatment in the wrong sequence, or fail to address safety and follow-up. Canadian practice should be anchored to Canadian Immunization Guide and public health guidance, with attention to acuity, safety-netting and local provincial pathways.

Reference: Canadian Immunization Guide and public health guidance