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Dengue fever — RACP Written MCQ

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ModerateInfectious DiseasesDengue feverRACP Written

A 24-year-old backpacker returns from Bali with fever, severe myalgia and retro-orbital pain. Platelets are 62 x 10^9/L, haematocrit is rising and transaminases are mildly elevated. There is no malaria on repeated films and symptoms began 3 days ago. What is the most appropriate investigation?

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Correct answer: DDengue NS1 antigen or PCR testing

Early dengue is best confirmed with NS1 antigen or PCR testing, while thrombocytopenia and haemoconcentration help identify severity and monitoring needs.

Reference: Therapeutic Guidelines: Antibiotic; Australian infectious diseases practice principles