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Thrombocytopenia in malaria: who cares?
Marcus Vinícius Guimarães Lacerda1, Maria Paula Gomes Mourão, Helena Cristina Cardoso Coelho
1Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, AM, Brasil. marcuslacerda.br@gmail.com
Memorias Do Instituto Oswaldo Cruz
|September 2, 2011
Summary
Thrombocytopenia, or low platelet count, is a common malaria complication affecting both Plasmodium vivax and Plasmodium falciparum. While its exact role remains unclear, platelet counts typically normalize after effective malaria treatment.
Area of Science:
- Hematology
- Infectious Diseases
- Parasitology
Background:
- Thrombocytopenia is a frequent complication in both Plasmodium vivax and Plasmodium falciparum malaria.
- Platelet counts below 150,000/mm³ occur in 24-94% of acute malaria patients, with similar frequencies across both species.
Purpose of the Study:
- To review the literature on thrombocytopenia in malaria.
- To explore potential mechanisms and management strategies for this complication.
Main Methods:
- Systematic review of existing literature.
- Analysis of data from experimental models.
Main Results:
- Thrombocytopenia is common in malaria, irrespective of Plasmodium species.
- Speculated mechanisms include coagulation issues, splenomegaly, bone marrow changes, immune destruction, oxidative stress, and platelet roles in severe malaria.
- Minor bleeding may occur, potentially compensated by megakaryocyte release of large platelets.
Conclusions:
- Thrombocytopenia is a common malaria complication but not a criterion for severity.
- Current management is largely conservative, with platelet counts usually recovering post-treatment.
- Further research is needed to determine if thrombocytopenia is a cause or consequence of malaria's clinical spectrum.
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