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Related Experiment Videos

Chicken (Gallus gallus) hemolytic complement: optimal conditions for its titration.

O Barta, V Barta

    Immunological Communications
    |January 1, 1975
    PubMed
    Summary

    Optimal conditions for measuring chicken complement (C) activity involve specific pH, ionic strength, and cation concentrations. Using sensitized swine erythrocytes provides the most sensitive assay for chicken C titers.

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    Area of Science:

    • Immunology
    • Biochemistry

    Background:

    • Complement (C) activity in avian sera is crucial for immune response.
    • Standardized assays are needed for accurate measurement of chicken C.

    Purpose of the Study:

    • To determine optimal conditions for titrating hemolytic complement (C) activity in chicken (Gallus gallus) sera.
    • To identify the most sensitive erythrocyte (E) and antibody combination for chicken C assays.

    Main Methods:

    • Systematic variation of pH, ionic strength, cation (Mg2+, Ca2+) concentration, and ethylenediaminetetraacetic acid trisodium salt (Na3EDTA).
    • Testing chicken sera against sensitized erythrocytes from various species.
    • Optimization of temperature and incubation time for maximal C titer detection.

    Main Results:

    • Sensitized swine erythrocytes were most sensitive for chicken C titration.
    • Optimal conditions included NaCl-barbital buffer (ionic strength 0.15), final Mg2+ at 1 X 10(-3) M, Ca2+ at 3 X 10(-4) M, and pH 8.
    • Maximal titers were observed at 30 degrees C with a 60-minute incubation time.

    Conclusions:

    • Established optimal parameters for reliable and sensitive quantification of chicken complement activity.
    • The findings provide a standardized protocol for future studies on chicken innate immunity and complement function.

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