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Immune complexes in healthy Nigerians

I I Onyewotu

    Transactions of the Royal Society of Tropical Medicine and Hygiene
    |January 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Circulating immune complexes were detected in Nigerian sera but not Caucasian sera. Malaria prophylaxis reduced anti-complementary activity, suggesting malaria-related complexes in Nigerians.

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    Area of Science:

    • Immunology
    • Tropical Medicine
    • Clinical Chemistry

    Background:

    • Circulating immune complexes (CICs) are implicated in various diseases.
    • Prevalence and significance of CICs in healthy populations in endemic regions are less understood.

    Purpose of the Study:

    • To investigate the presence and characteristics of CICs in healthy Nigerian and Caucasian populations.
    • To explore the potential association of CICs with malaria in Nigerians.

    Main Methods:

    • Sera from 50 healthy Nigerians and 50 healthy Caucasians were analyzed for CICs using three methods.
    • Radio-bioassay was used to detect CICs, with further analysis of anti-complementary activity.
    • Malaria parasitaemia and serum IgM levels were assessed.

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    Main Results:

    • CICs were detected in Nigerian sera but not in Caucasian sera.
    • A subset of CIC-positive Nigerian sera exhibited anti-complementary activity, strongly associated with malarial parasitaemia.
    • Malarial prophylaxis led to a decrease in anti-complementary activity and IgM levels in affected Nigerian subjects.

    Conclusions:

    • Healthy Nigerians exhibit CICs, unlike healthy Caucasians.
    • Complement-fixing CICs may be linked to malaria in apparently healthy Nigerians.
    • Assays for complement-fixing CICs could aid in identifying significant infections in this population.