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Related Experiment Videos

Comparison of some screening tests for detecting mastitis.

U Emanuelson, T Olsson, O Holmberg

    Journal of Dairy Science
    |April 1, 1987
    PubMed
    Summary

    Somatic cell counts, ATP, and NAGase best predict udder infection. Combining diagnostic tests slightly improves prediction accuracy for mastitis detection in dairy cows.

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    Area of Science:

    • Veterinary Medicine
    • Dairy Science
    • Animal Health

    Background:

    • Subclinical mastitis poses significant economic challenges in the dairy industry.
    • Accurate and early detection of udder infections is crucial for effective treatment and herd management.
    • Various milk components and diagnostic tests are explored for their efficacy in identifying infection status.

    Purpose of the Study:

    • To evaluate the predictive ability of different milk components and diagnostic tests for udder infection.
    • To compare the effectiveness of individual tests versus combinations of tests.
    • To assess the utility of interquarter comparisons in predicting infection.

    Main Methods:

    • Analysis of quarter milk samples for somatic cell counts, ATP, NAGase, bovine serum albumin, antitrypsin, and conductivity.

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  • Bacteriological examination to determine infection status.
  • Logistic regression analysis to evaluate the predictive power of each diagnostic test.

    • Main Results:

    • All measured components (somatic cell counts, ATP, NAGase, etc.) were elevated in infected quarters.
    • ATP, somatic cell counts, and NAGase demonstrated the highest predictive ability for infection.
    • Combinations of tests generally offered minor improvements in predictive accuracy compared to individual tests.

    Conclusions:

    • ATP, somatic cell counts, and NAGase are reliable indicators for predicting udder infection status.
    • While combining diagnostic tests can offer slight improvements, individual test performance is substantial.
    • Interquarter ratios did not consistently enhance prediction accuracy, except possibly for conductivity.