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Related Experiment Videos

The 'small spleen' in malaria

R Chauhan1, V Kapoor, P A Vohra

  • 1Dept of Medicine, SSG Hospital and Medical College, Baroda.

The Journal of the Association of Physicians of India
|July 1, 1996
PubMed
Summary

Past Plasmodium falciparum malaria infection significantly reduces spleen size in adults, a finding termed "Small Spleen." This contrasts with P. vivax malaria, where spleen size reduction is not significant.

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Area of Science:

  • Tropical Medicine
  • Parasitology
  • Medical Imaging

Background:

  • Splenomegaly is a common malaria symptom, but often absent in adults with prior falciparum malaria exposure or from endemic areas.
  • Previous malaria episodes, particularly falciparum malaria, are associated with reduced spleen size.

Purpose of the Study:

  • To ultrasonographically evaluate spleen size and echotexture in healthy adult males with a history of malaria (P. vivax or P. falciparum) or from endemic areas.
  • To investigate the 'Small Spleen' phenomenon and its association with Plasmodium falciparum malaria.

Main Methods:

  • Ultrasonographic spleen evaluation in 90 healthy adult males.
  • Comparison of spleen size and echotexture between groups: P. vivax malaria history (n=28), P. falciparum malaria history (n=25), controls (n=22), and endemic falciparum area natives (n=15).

Main Results:

  • Spleen size was significantly decreased (p < 0.01) in individuals with a history of P. falciparum malaria.
  • Spleen size reduction was not statistically significant (p < 0.1) in the P. vivax group.
  • A highly significant decrease in spleen size (p < 0.001) was observed in natives from endemic falciparum regions.

Conclusions:

  • The study establishes the 'Small Spleen' as a distinct ultrasonographic finding, particularly associated with P. falciparum malaria.
  • Ultrasonography can reveal variations in spleen echotexture patterns related to malaria history.
  • Prior P. falciparum malaria exposure leads to a significant and measurable reduction in spleen size.

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