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[Quantitative cytological findings in mixed milk samples].

M Pospísil

    Veterinarni Medicina
    |January 1, 1981
    PubMed
    Summary

    Cytological examination of mixed milk samples is unreliable for detecting mastitis. Elevated cell counts above 500,000 cells/ml in bulk milk only signal potential mastitis outbreaks in dairy herds.

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    Area of Science:

    • Veterinary Medicine
    • Dairy Science
    • Microbiology

    Context:

    • Mastitis is a significant concern in dairy farming, impacting milk quality and animal welfare.
    • Accurate detection of mastitis is crucial for effective herd management and economic viability.
    • Cytological examination of milk is a common diagnostic tool.

    Purpose:

    • To evaluate the reliability of cytological examination of mixed milk samples for mastitis detection in dairy cows.
    • To determine the threshold for cellular elements in mixed milk samples indicative of udder health status.

    Summary:

    • Over a ten-month period, 5851 udder-quarter and 141 can milk samples were analyzed using cytological and bacteriological methods.
    • Mixed milk samples with cell counts ≤ 500,000 cells/ml did not reliably indicate udder health.
    • Counts > 500,000 cells/ml in mixed samples suggested increased secretion from infected quarters but did not quantify the number of affected quarters or the disease severity.

    Impact:

    • Cytological examination of mixed milk samples is not a reliable indicator of individual udder quarter health.
    • A cell count threshold of 500,000 cells/ml in bulk milk serves only as a preliminary signal for potential mastitis prevalence within a herd.
    • Results from mixed milk samples should be interpreted cautiously, primarily for identifying herds with high mastitis occurrence.

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