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Magnesium and milk fever.

B F Sansom, R Manston, M J Vagg

    The Veterinary Record
    |May 7, 1983
    PubMed
    Summary

    Subclinical hypomagnesaemia (low magnesium) in dairy cows is linked to milk fever. This condition impairs calcium mobilization, increasing milk fever incidence and impacting herd health.

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    Area of Science:

    • Veterinary Medicine
    • Animal Nutrition
    • Biochemistry

    Background:

    • Milk fever (parturient hypocalcemia) is a significant metabolic disorder in dairy cows.
    • Subclinical hypomagnesaemia is frequently observed in high-risk herds.
    • The precise mechanisms linking low magnesium to milk fever require further elucidation.

    Purpose of the Study:

    • To explore the evidence connecting subclinical hypomagnesaemia to milk fever incidence.
    • To investigate the physiological impact of hypomagnesaemia on calcium regulation in cows.
    • To consider the implications for effective milk fever prevention strategies.

    Main Methods:

    • Review of clinical observations in dairy herds.
    • Analysis of experimental data on magnesium's role in calcium homeostasis.
    • Examination of theoretical biochemical pathways involving magnesium and calcium.

    Main Results:

    • Clinical evidence shows subnormal blood magnesium in cows from herds with high milk fever rates.
    • Experimental findings indicate subclinical hypomagnesaemia impairs calcium mobilization during hypocalcemia.
    • Theoretical studies highlight magnesium's essential role in calcium metabolism pathways.

    Conclusions:

    • Subclinical hypomagnesaemia is a significant risk factor for milk fever in dairy cows.
    • Maintaining adequate magnesium levels is crucial for preventing milk fever.
    • Understanding these connections can improve herd management and milk fever prevention.

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