Reply To: Mastitis In Sheep and Goats

  • theholisticgoat

    May 13, 2023 at 10:06 am

    I was particularly interested in whether or not we could confirm that mastitis infected milk fed to heifers could be linked to mastitis in the heifer.

    Sources of Intramammary Infections
    from Staphylococcus aureus
    in Dairy Heifers at First Parturition

    “Mode of Transmission
    The consumption of milk containing S. aureus by
    preweaned heifer calves is one obvious route of S.
    aureus transmission. However, results from a previous study do not support this premise because no
    preweaned heifers with S. aureus isolated from a body
    site were persistently colonized from birth to first
    parturition (17). Although S. aureus from milk may
    be an important source of S. aureus from heifer colostrum, little evidence was gained as to how this transmission occurs (in 41% of 61 heifers, only S. aureus
    from milk were the same). One plausible explanation
    is social contact among prepartum heifers. Evidence
    to support this explanation is presented in Table 4, in
    which the strain identified in heifer colostrum at
    parturition was also identified on body sites of multiple heifers of similar age. Prepartum heifers in herd
    G were partially raised in a heifer rearing feedlot,
    and social contact with heifers from numerous other
    dairies may explain the presence of newly acquired
    strains in this low prevalence dairy herd.”