ZyraDoc #45 - September 15, 2026

A 31-year-old male traveler returns to the emergency clinic 10 days after visiting an endemic sub-Saharan region, presenting with high-grade fever, severe rigors, profuse sweating, and progressive confusion.

On physical examination, he is febrile (39.8°C), jaundiced, tachypneic, and lethargic, with scleral icterus and palpable splenomegaly.

Thick and thin blood smears demonstrate heavy parasitemia (>5% infected erythrocytes) with ring-form trophozoites and banana-shaped gametocytes of Plasmodium falciparum.

Case Summary

Clinical Focus:

The diagnosis is Severe Plasmodium falciparum Malaria.

Aetiology/Cause:

Infection with the protozoan parasite Plasmodium falciparum, transmitted through the bite of an infected female Anopheles mosquito.
Erythrocytic schizogony causing widespread red blood cell destruction, cytoadherence, and sequestration of parasitized erythrocytes in microvascular beds.
Failure to take appropriate chemoprophylaxis during travel to malaria-endemic regions.

Clinical Features:

High-grade paroxysmal fevers, chills, rigors, diaphoresis, and severe generalized arthralgia/myalgia.
Cerebral malaria manifestations including lethargy, delirium, coma, or generalized convulsions.
Severe normocytic anemia, scleral icterus, jaundice, and dark urine (blackwater fever due to massive intravascular hemolysis).
Signs of vital organ dysfunction including dyspnea, oliguria, hypotension, and deep Kussmaul respirations (metabolic acidosis).

Diagnosis and Investigations:

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