[theholisticgoat]

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.”

Sources-of-Intramammary-Infections-from-Staphylococcus-aureus-in-Dairy-Heifers-at-First-Parturition.pdf 110 KB PDF - Click to view

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