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Related Experiment Videos

Testing of hemolytic complement components in domestic animals

O Barta, N L Hubbert

    American Journal of Veterinary Research
    |August 1, 1978
    PubMed
    Summary
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    Complement component levels vary significantly across domestic animal species. Carnivores and omnivores show higher levels of late-acting complement components (C6-C9) and C1, unlike herbivores, indicating species-specific differences in immune responses.

    Area of Science:

    • Immunology
    • Veterinary Medicine
    • Comparative Biology

    Background:

    • The complement system (C) is crucial for innate and adaptive immunity.
    • Understanding complement component levels in domestic animals is vital for comparative immunology and disease research.
    • Previous studies have not comprehensively compared complement profiles across diverse domestic animal species.

    Purpose of the Study:

    • To assay total complement and its components in eight domestic animal species.
    • To identify species-specific differences in complement component presence and activity.
    • To evaluate potential interferences in complement testing due to species-specific serum factors.

    Main Methods:

    • Serum samples from eight domestic animal species were tested for complement components.

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  • Commercially prepared cellular intermediates and purified human/guinea pig complement components were utilized.
  • Standardized laboratory methods, adapted from human complement testing protocols, were employed.

    • Main Results:

    • Late-acting complement components (C6-C9) and C1 were detected in dogs, cats, and swine.
    • Low or undetectable levels of C4, C2, C3, and C5 were observed in cattle, horses, sheep, and goats.
    • Porcine serum exhibited an inhibitory substance affecting C2 and later component testing.
    • All complement components except C2 were found in chicken serum.
    • Complement component activation (C4, C2, C3, C5) demonstrated significant species specificity.

    Conclusions:

    • Significant inter-species variations exist in complement component profiles among domestic animals.
    • Herbivores exhibit distinct complement system characteristics compared to carnivores and omnivores.
    • Species-specific factors can influence complement component assays, necessitating careful methodological adaptation.