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Animal Reproduction and Physiology
Asian-Australasian Journal of Animal Sciences 1990;3(4): 293-298.
https://doi.org/10.5713/ajas.1990.293    Published online December 1, 1990.
The phenotypic relations between somatic cell counts and milk constituents of clinical and non-clinical mastitis milk of dairy cows
S. Kobayashi, T. Ohtani
Pathogen infections or mastitis inflammations usually develop differently on each udder of lactating cow. Although healthy udders will be attacked by the mastitis pathogens or the pathogens from blood in a long term, they would not be always inflamed. Somatic cell counts (SCC) in milk, which is utilized as an index of mastitis diagnosis, and the relation among SCC and milk constituents will have to be examined on each udder individually. Twelve cows of a Holstein cow herd in Nasu Research Station, which were suffering clinical or non-clinical mastitis, were selected, and SCC and milk constituents on each udder milk were measured. The effects of mastitis infection on udder milk components were relatively small except lactose content on udder milks of non-clinical mastitis (SCC < 10.0 횞 105 per ml milk). On udder milks of clinical mastitis, however, high negative correlations were recognized between SCC and milk components. On different sampling days, high contents of fat and protein corresponded to that of total solids.
Keywords: Somatic Cell Counts; Milk Constituents; Non-Clinical Mastitis; Daily Cow
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