Which plasmodium causes Malignant and cerebral Malaria?

Appeared in: NHM UP Staff Nurse - 2016

Explanation

Plasmodium falciparum is the species responsible for the most severe forms of malaria, including malignant and cerebral malaria.
This is due to its ability to infect red blood cells of all ages, leading to very high parasite densities (hyperparasitemia).
A key pathogenic feature is cytoadherence, where infected red blood cells stick to the endothelium of small blood vessels.
This sequestration of parasites in the brain's microvasculature obstructs blood flow, causing the neurological complications of cerebral malaria.

Option A: P. ovale causes a milder form of malaria, known as tertian malaria. It is generally not associated with severe or life-threatening complications like cerebral malaria.
Option B: P. malariae causes quartan malaria, which is the mildest and most chronic form. It does not cause malignant or cerebral malaria.
Option D: While P. vivax can occasionally cause severe disease, it is not the typical cause of malignant and cerebral malaria. Its severity is generally less than that of P. falciparum.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Causative agent of malignant and cerebral malaria as background academic context rather than a clinical decision trigger.
A diagnosis of falciparum malaria is a medical emergency. Nurses must be vigilant in monitoring for signs of severity.
Key signs of severe malaria include altered consciousness (confusion, drowsiness, coma), repeated seizures, respiratory distress (acidosis), jaundice, and acute kidney injury (oliguria).
Immediate nursing actions include rapid diagnostic testing, prompt administration of antimalarials (e.g., IV artesunate for severe cases), monitoring vital signs, Glasgow Coma Scale (GCS), blood glucose, and urine output.

How to Approach the Question

First, identify the key terms in the question: "Malignant Malaria" and "Cerebral Malaria". These terms indicate the most severe form of the disease.
Next, recall the different species of Plasmodium that infect humans: P. falciparum, P. vivax, P. ovale, and P. malariae.
Associate each species with its typical disease severity. Remember that one species is known to be far more lethal than the others.
Recognize that P. falciparum is uniquely associated with the most severe complications due to its specific pathogenic mechanisms (cytoadherence and sequestration).
Select the option corresponding to P. falciparum as the cause of malignant and cerebral malaria.

Concept Tested & Keywords

Q3sqkIJUoq2AJ-mg_CavOE

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 pp. 2178-2180, 2177-2179

E6 Medicine Harrison 22e Part 1 p. 1801-1803

Practise the full NHM UP Staff Nurse - 2016

Attempt every question from this paper in a timed mock, then review the full solution for each one.