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Plasmodium falciparum Parasitemia
A life-threatening mosquito-borne infectious disease caused by Plasmodium parasites, characterized by febrile paroxysms, anemia, and microvascular sequestration.
Normal Parasite-Free Serum
Tissue Impact: Unobstructed microvascular blood flow.
Intraerythrocytic cytoadherence blocking microcapillaries.
Cyclic fever spikes occurring every 48 hours corresponding to synchronized RBC rupture
System: SystemicDefervescence phase following severe febrile paroxysm
System: SystemicMassive intraerythrocytic destruction releasing unconjugated bilirubin
System: HematologyEnlargement of spleen from macrophage clearance of parasitized red blood cells
System: LymphaticDiagnosed by microscopic examination of Giemsa-stained thick and thin blood films or Rapid Diagnostic Tests (RDTs) detecting PfHRP2 antigen.
| Test Name | Category | Normal Range | Pathological Value | Clinical Significance |
|---|---|---|---|---|
| Thin & Thick Blood Smear Microscopy | Blood | No parasites seen | Plasmodium ring forms & gametocytes present | Gold standard for species identification and parasitemia quantification. |
| Malaria Rapid Diagnostic Test (RDT) | Immunological | Negative | Positive (PfHRP2 / pLDH) | Point-of-care antigen test. |
| G6PD Activity Screen | Biochemical | > 7.0 U/g Hb | < 30% normal activity | Required before administering Primaquine/Tafenoquine to prevent hemolysis. |
Hepatosplenomegaly with homogeneous hypoechoic parenchyma.
Mechanism of Action: Artemether generates endoperoxide free radicals; Lumefantrine inhibits hemozoin polymerization.
Mechanism of Action: Rapid cleavage of endoperoxide bridge causing alkylation of malarial proteins.
Mechanism of Action: Eliminates dormant liver hypnozoites of P. vivax / P. ovale.
| Clinical Feature | MalariaICD: B50.9 | Diabetes MellitusICD: E11.9 |
|---|---|---|
| Category | INFECTIOUS | ENDOCRINE |
| Pathophysiology | Injected sporozoites invade hepatocytes (exoerythrocytic cycle). Merozoites emerge to infect red blood cells (erythrocytic cycle). PfEMP1 surface proteins on P. falciparum infected RBCs bind ICAM-1 and CD36, causing cytoadherence, rosetting, and microvascular occlusion in the brain and placenta. | Insulin resistance in skeletal muscle, liver, and adipose tissue decreases glucose uptake. In response, pancreatic beta cells hypersecrete insulin until exhaustion occurs. Hyperglycemia damages endothelial cell walls through advanced glycation end-products (AGEs) and oxidative stress. |
| Affected Organs | liver, spleen, brain, kidneys | pancreas, kidneys, eyes, heart, brain, nerves |
| Key Symptoms |
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| Gold Standard Diagnosis | Demonstration of asexual Plasmodium forms on blood film OR positive RDT in a febrile patient. | Fasting plasma glucose ≥ 126 mg/dL (7.0 mmol/L) on two separate occasions. |
| First-Line Medication | Artemether / Lumefantrine (Artemisinin-based Combination Therapy (ACT)) | Metformin (Biguanide) |