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Scientific
Publications - Work Done by Microbiology Reader
Kaartinen, L. and Pyörälä, S., Changes in milk plasminogen, plasmin and in vitro bacterial growth in whey during early lactation, Journal of Dairy Research, 1989, vol. 56, (5), pp. 719-725 ABSTRACT The activity of milk plasmin, plasminogen and
N-acetyl-beta-glucosaminidase (NAGase) and the trypsin-inhibitor capacity (TIC)
were monitored in 40 quarters during the first month of lactation. TIC and
NAGase activity decreased rapidly and plasmin activity more slowly during the
first week. Conversely milk plasminogen increased as time elapsed from
parturition. When the quality of whey was analysed as a growth medium for
mastitis pathogens, a slight inhibition in the growth of Escherichia coli,
Staphylococcus aureus and Streptococcus agalactiae was seen at the day of
parturition. There was a distinct stimulatory effect on the growth of Str.
agalactiae during the second week of lactation. No relationship was found
between in vitro bacterial growth and respective plasmin or plasminogen activity
in milk.
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