Malaria: Incubation, Treatment Duration, and Complications of Delay

Malaria Timeline and Treatment

Incubation Period

Typically 10 days to 4 weeks post-infection; range 7 days–1 year (longer for P. vivax/ovale due to hypnozoites).

Treatment Duration

• Uncomplicated malaria: 3-day ACT course (artemether-lumefantrine, artesunate-amodiaquine, etc.).
• Severe malaria: IV artesunate ≥24 hrs, then oral ACT completion; total 7 days. ICU care often needed.
• P. vivax/ovale: Add 14-day primaquine (after G6PD testing) to eradicate hypnozoites.

Complications of Untreated/Delayed Treatment

• Cerebral malaria (seizures, coma, death)
• Severe anemia (hemolysis + dyserythropoiesis)
• Acute respiratory distress syndrome (ARDS)
• Acute kidney injury
• Hepatic dysfunction/jaundice
• Hypoglycemia
• Death (case-fatality up to 20% in severe cases without treatment)

Early diagnosis and full-course ACT are critical.