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Related Experiment Videos

Coagulation studies in Gambian trypanosomiasis

B M Greenwood, H C Whittle

    The American Journal of Tropical Medicine and Hygiene
    |May 1, 1976
    PubMed
    Summary

    Advanced Trypanosoma gambiense infection did not show disseminated intravascular coagulation. However, many patients experienced thrombocytopenia and elevated fibrin degradation products in cerebrospinal fluid, suggesting vascular damage.

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    Area of Science:

    • Medical Research
    • Parasitology
    • Hematology

    Background:

    • Trypanosoma gambiense infection, also known as Human African Trypanosomiasis, can affect multiple organ systems.
    • Coagulation abnormalities have been anecdotally reported in advanced stages of the disease.

    Purpose of the Study:

    • To investigate coagulation profiles in patients with advanced Trypanosoma gambiense infection.
    • To determine the presence or absence of disseminated intravascular coagulation (DIC).
    • To explore potential mechanisms for observed hematological changes.

    Main Methods:

    • Coagulation studies were performed on 18 patients with advanced Trypanosoma gambiense infection.
    • Platelet counts were assessed.
    • Levels of fibrin degradation products (FDPs) in cerebrospinal fluid (CSF) were measured.
    • In vitro experiments exposed human and rat blood to trypanosomes and trypanosome extracts.

    Main Results:

    • No evidence of disseminated intravascular coagulation (DIC) was detected in the patients.
    • A moderate degree of thrombocytopenia (low platelet count) was observed in many patients.
    • Elevated levels of fibrin degradation products (FDPs) were found in the cerebrospinal fluid (CSF) of most patients.
    • In vitro addition of trypanosomes or their extracts did not induce significant thrombocytopenia.

    Conclusions:

    • Advanced Trypanosoma gambiense infection is not associated with disseminated intravascular coagulation (DIC).
    • Thrombocytopenia in these patients may result from increased platelet sequestration in the spleen.
    • Elevated FDPs in CSF suggest potential cerebral and meningeal vascular damage in advanced stages of the infection.

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