It can be observed from Table 2 and 3 that the
concentration of Cu, Mn and AST were comparable in
infected and normal milk, which agrees with the previous
findings. Insignificant increase in Cu might be due to
redistribution of the metal from liver to blood and finally to
udder tissues and believed to be initiated by leukocytic
endogenous mediators (Gera et al., 2011).
Significant
elevation of ALP (Tables 2 and 3) in SCM milk might be
due to both mammary epithelial damage and a breach in the
blood-milk barrier selectively damaged by bacterial toxins
(Katsoulos et al., 2010).
The origin of LDH in SCM milk is
attributed to the presence of leucocytes and epithelial cells
from the udder (Mohammadian, 2011).
Katsoulos et al.
(2010) reported that the origin of elevated LDH and ALP
activity was from leukocyte and mammary epithelial and
interstitial cells damaged during inflammation, particularly
from disintegrated leukocytes.