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Human cerebral malaria: a pathological study.

M M Oo, M Aikawa, T Than

    Journal of Neuropathology and Experimental Neurology
    |March 1, 1987
    PubMed
    Summary
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    Cerebral malaria, caused by Plasmodium falciparum, blocks brain capillaries with infected red blood cells. This blockage, linked to immune responses, leads to capillary damage and hemorrhages in the brain.

    Area of Science:

    • Neurology
    • Immunology
    • Infectious Diseases

    Background:

    • Cerebral malaria is a severe complication of Plasmodium falciparum infection.
    • Pathological mechanisms underlying cerebral malaria remain incompletely understood.

    Purpose of the Study:

    • To investigate the ultrastructural and immunological changes in cerebral capillaries of patients with cerebral malaria.

    Main Methods:

    • Light and electron microscopy were used.
    • Immunoperoxidase techniques were employed.
    • The study analyzed tissues from 19 patients who died of cerebral malaria.

    Main Results:

    • Blockage of cerebral capillaries by Plasmodium falciparum-infected erythrocytes was the principal finding.

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  • Electron-dense knobs on infected erythrocytes formed junctions with endothelial cells, causing capillary obstruction.
  • Ring hemorrhages, segmental capillary necrosis, and cerebral edema were observed.
  • P. falciparum antigens and IgG deposits were found in the capillary basement membrane.

    • Conclusions:

    • Cerebral capillary obstruction by infected erythrocytes is a key pathological feature.
    • Immune mechanisms, indicated by antigen and IgG deposition, may contribute to cerebral capillary damage in malaria.