Individual quarter samples from some 19 cows on average were investigated monthly over 12 months for
determining the udder health status of cows and the glucose concentrations of foremilk and strippings.
Foremilk showed a mean 0,1311 mM concentration of glucose which remained fairly stable during the
period of investigation and lactation. A fluctuating mean value of 0,2037 mM was determined in strippings in
which glucose levels were consistently and appreciably higher than those of foremilk. Foremilk from completely normal quarters and others affected by non-specific cellular reaction, relevant or irrelevant teat canal infection and aseptic or septic subclinical mastitis, showed mean glucose concentrations of 0,1410; 0,1392; 0,1337; 0,1417; 0,1262 and 0,1248 mM, respectively. Strippings from the same quarters
showed corresponding values of 0,2056; 0,2861 ; 0,2100; 0,1733; 0,1661 and 0,1617 mM glucose.
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