Where do most complications develop in humans infected with malaria?

Where do most complications develop in humans infected with malaria?

• A. Liver
• B. Heart
• C. Brain
• D. Spleen

Answer: (C)

Most severe malaria complications come from the brain, especially with falciparum malaria. Parasitized red blood cells adhere to the lining of small brain vessels and become stuck, narrowing flow and triggering inflammation. This microvascular obstruction and inflammatory response disrupt blood flow to brain tissue, damage the blood–brain barrier, and lead to cerebral malaria—characterized by coma, seizures, and potentially death if not treated quickly. While the liver is the site where the parasite first multiplies, these early stages don’t drive the life-threatening complications; they arise from the blood stage and its effects in the brain. The spleen can enlarge as part of the immune response, and heart involvement can occur but is less common. Thus, the brain is where most complications develop.

Most severe malaria complications come from the brain, especially with falciparum malaria. Parasitized red blood cells adhere to the lining of small brain vessels and become stuck, narrowing flow and triggering inflammation. This microvascular obstruction and inflammatory response disrupt blood flow to brain tissue, damage the blood–brain barrier, and lead to cerebral malaria—characterized by coma, seizures, and potentially death if not treated quickly. While the liver is the site where the parasite first multiplies, these early stages don’t drive the life-threatening complications; they arise from the blood stage and its effects in the brain. The spleen can enlarge as part of the immune response, and heart involvement can occur but is less common. Thus, the brain is where most complications develop.