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Giardiasis Treatment — RACP Paediatrics MCQ

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EasyInfectious DiseaseGiardiasis TreatmentRACP Paediatrics

A 3-year-old presents with chronic diarrhoea after returning from overseas travel. Stool microscopy shows Giardia lamblia cysts. He has no other symptoms. What is the treatment?

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Correct answer: C — Oral metronidazole (or tinidazole)

Giardiasis causing symptoms should be treated with metronidazole (30 mg/kg/day in 3 doses for 5-7 days) or tinidazole (50 mg/kg single dose, max 2 g). Treatment of asymptomatic carriage is debated but generally recommended in children (to prevent transmission and potential symptoms).

Reference: Therapeutic Guidelines – 2024 – Antibiotic: Giardiasis