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標題: 山羊乳之體細胞數、導電度、乳清乳酸去氫活性與乳量之變化
The Variation of Milk Somatic Cell Counts, Electrical Conductivities, Milk Serum Lactate Dehydrogenase Activities and Milk Production in Goats
作者: 劉文博
Liu, Wen-Bor
關鍵字: 山羊;dairy goat;體細胞數;導電度;乳清乳酸去氫;同功;乳量;somatic cell counts;electrical conductivities;lactate dehydrogenase activities;isoenzymes;milk production
出版社: 畜產學系

The purposes of this study were conducted to investigate the variation of milk somatic cell counts (SCC), electrical conductivities (EC), milk serum lactate dehydrogenase activities and milk production in goats for monitoring the health of udder and the quality of goat milk. Individual half udder samples of morning and evening milking were taken from twenty does weekly. In addition, milk production of individual doe was recorded weekly, and the bacterial isolation of each half udder milk sample was tested monthly. The result showed that the milk production of morning milking in individual doe was significantly higher than those in evening milking, the electrical condutivites of morning milking samples were higher than those in the evening milking samples, but there were no significant difference can be seen, while the somatic cell counts and lactate dehydrogenase activities of evening milking samples were significantly higher than those in the morning milking samples (P<0.05 ). The correlation coefficients of somatic cell counts, lactate dehydrogenase activities and electrical conductivities with milk production were —0.42, -0.52 and —0.12 respectively, while the correlation coefficients of somatic cell counts with lactate dehydrogenase activities, somatic cell counts with electrical conductivites, and lactate dehydrogenase activities with electrical conductivities were 0.65, 0.15 and 0.21 respectively. The correlation coefficients of LDH1 and LDH2 with SCC were —0.57 and —0.20 respectively, while the coefficients of LDH3, LDH4 and LDH5 with SCC were 0.66, 0.37 and 0.28 respectively. In does, the LDH3, LDH4 and LDH5 activities of infected half udder were significantly higher than those in the normal half udder (p<0.01), while the LDH1 activities in half udder were significantly lower than those in the normal half udder (p<0.01). The result of this study indicated that the analysis of somatic cell counts and lactate dehydrogenase activities can be used as an indicator for monitoring the subclinical mastitis of dairy goat.
Appears in Collections:動物科學系

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