Severe malarial anaemia in children — DTM&H MCQ

Correct answer: E — Immediate blood transfusion

The correct answer is E, immediate blood transfusion. This child has severe malarial anaemia (Hb 38 g/L, well below the 40 g/L threshold for automatic transfusion) plus cerebral malaria (GCS 8) and hyperparasitaemia (15%), all of which independently mandate urgent transfusion alongside IV artesunate. Severe anaemia in falciparum malaria reflects haemolysis, marrow suppression and splenic sequestration, and rapidly worsens tissue oxygen delivery in a child already compromised by impaired consciousness. UK and international severe malaria guidance treats transfusion as a time critical supportive measure that runs in parallel with, not instead of, antiparasitic treatment, since neither artesunate nor any other option corrects the oxygen deficit caused by profound anaemia. Waiting for parasitological response before correcting Hb of 38 g/L in a comatose child would risk fatal hypoxic organ injury. Why the other options are wrong: B. Urgent exchange transfusion: exchange transfusion has no proven mortality benefit in severe falciparum malaria and is not recommended by current guidelines; it delays definitive treatment and diverts resources without addressing the anaemia specifically. A. Prophylactic phenobarbitone: anticonvulsant prophylaxis (particularly phenobarbitone) has been shown to increase mortality in cerebral malaria trials and is not indicated in the absence of active seizures. C. Intravenous dexamethasone: corticosteroids do not improve outcomes in cerebral malaria and have been associated with harm (prolonged coma, increased complications), so they are specifically contraindicated. D. Oral folic acid supplementation: folic acid is a reasonable adjunct for haematological recovery but is not urgent, is enterally absorbed too slowly to matter acutely, and does nothing for the immediate life-threatening anaemia and hypoxia. Key point: In severe falciparum malaria, life-threatening anaemia (Hb well under 40 to 60 g/L with impaired consciousness) requires immediate blood transfusion as an emergency measure alongside, not instead of, IV artesunate.

Reference: Lalloo DG, Shingadia D, Bell DJ, et al. UK malaria treatment guidelines 2016. Journal of Infection 2016;72(6):635-649. Available at: https://www.journalofinfection.com/article/S0163-4453(16)00047-5/fulltext