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Changes in IgG2 levels with age in British cattle

M R Williams, P Millar

    Research in Veterinary Science
    |July 1, 1978
    PubMed
    Summary

    Bovine immunoglobulin G2 (IgG2) levels significantly increase with age in cattle, unlike immunoglobulin G1 (IgG1) and immunoglobulin M (IgM). This study analyzed 282 cattle, finding no immunodeficiencies but wide IgG2 variations.

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    Area of Science:

    • Veterinary Immunology
    • Animal Science
    • Immunoglobulin Research

    Background:

    • Immunoglobulins (IgG1, IgG2, IgM) are crucial for bovine immune function.
    • Understanding age-related changes in immunoglobulin levels is vital for herd health management.
    • Previous research on age-specific immunoglobulin profiles in cattle is limited.

    Purpose of the Study:

    • To investigate the impact of age on serum IgG1, IgG2, and IgM levels in cattle.
    • To identify potential differences in immunoglobulin concentrations between breeds and environmental factors.
    • To establish baseline immunoglobulin levels and assess the prevalence of immunodeficiency in the studied cattle population.

    Main Methods:

    • Serum samples were collected from 282 cattle of various ages.
    • Quantification of IgG1, IgG2, and IgM levels using established laboratory assays.
    • Statistical analysis of immunoglobulin data, including least squares analysis, to determine age and breed effects.

    Main Results:

    • Serum IgG2 levels showed a marked increase with age in bulls and dairy cattle.
    • IgG2 levels increased by approximately 300% between one and eight years of age, while IgG1 increased by only 20%.
    • No significant effect of age was observed on IgM levels. No breed differences were found between Hereford and Friesian bulls, but environmental factors influenced IgG1 and IgM levels.

    Conclusions:

    • Age is a significant factor influencing IgG2 levels in cattle, with a notable increase observed in older animals.
    • The wide range of IgG2 levels (1-35 mg/ml) suggests considerable individual variation, though no immunodeficiency was detected.
    • Environmental factors, such as artificial insemination (AI) centers, can impact IgG1 and IgM levels, highlighting the need for considering such variables in herd health studies.

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