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Related Experiment Videos

Subclinical mastitis in suckler cows

A C Hunter, D C Jeffrey

    The Veterinary Record
    |May 17, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Subclinical mastitis affects 18% of beef suckler cows, primarily caused by staphylococci. High somatic cell counts do not always indicate infection, especially in early lactation.

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    Area of Science:

    • Veterinary Medicine
    • Animal Health
    • Bovine Diseases

    Background:

    • Subclinical mastitis is a significant concern in dairy herds, but less is known about its incidence in beef suckler cows.
    • Udder health management practices can differ significantly between beef suckler and intensive dairy systems.
    • Understanding infection dynamics is crucial for herd health management and economic viability.

    Purpose of the Study:

    • To investigate the incidence and causative agents of subclinical mastitis in beef suckler cows.
    • To compare milk sample contamination levels with those from dairy herds.
    • To analyze the relationship between somatic cell counts, bacterial counts, and lactation stage.

    Main Methods:

    • A two-year study involving 2400 quarter milk samples from 180 beef suckler cows.

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  • Analysis of somatic cell counts (SCC) and total bacterial counts (TBC).
  • Isolation and identification of infecting organisms using sheep blood agar.

    • Main Results:

    • 18% of quarter milk samples showed infection, with staphylococci (67%) and streptococci (20%) as primary pathogens.
    • Lower contamination rates were observed compared to dairy herds, despite dirty udders.
    • High SCC (>1 million/ml) were not always linked to infection (36% of cases); staphylococcal infections were more frequently associated with lower SCC (<500,000/ml).
    • Infections and high SCC were more prevalent in early lactation.

    Conclusions:

    • Subclinical mastitis is present in beef suckler herds, with specific bacterial profiles.
    • Somatic cell counts alone may not be definitive indicators of infection in this population.
    • Lactation stage influences both infection prevalence and SCC levels, suggesting management considerations.