Total and differential bulk cow milk somatic cell counts and their relation with antioxidant factors - 15/02/08
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Abstract |
In the present study, the relationship between total bulk milk somatic cell counts (BMSCC), differential BMSCC (macrophage, lymphocyte, and polymorphonuclear leukocytes), and antioxidant enzymes was investigated. Forty-three samples of bulk milk were selected randomly from eight dairy farms in the region of Sfax (Tunisia) in winter, from November 2005 to February 2006. Bulk milk samples were analyzed for antioxidant enzymes such as catalase, SOD and GSHPx activity and differential SCC. After that, milks were allotted according to their total SCC to: group 1, bulk milk with SCC below 
; group 2, bulk milk with SCC from 
to 
; group 3, bulk milk with SCC above 
. BMSCC levels ranged from 
to nearly 
. Lymphocytes were the predominant cell type in all groups, but their proportion declined with the total BMSCC. Catalase and GSHPx activities were found to be significantly (
) correlated with total BMSCC and with the PMN population. In contrast, a weak correlation between the activity of the SOD and total or differential bulk milk somatic cells was observed. It has been suggested that milk cells, especially PMN, could generate a situation of oxidative stress in the mammary gland. Specifically, hydrogen peroxide and hydroxyl radicals were probably the most important reactive oxygen metabolites released by PMN. To cite this article: H. Hamed et al., C. R. Biologies 331 (2008).
Keywords : Bulk milk somatic cell counts, Differential somatic cell counts, Polymorphonuclear leukocytes, Oxidative stress
Plan
Vol 331 - N° 2
P. 144-151 - février 2008 Retour au numéro
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