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Exogenous influences on quarter milk cell counts with special emphasis on udder health status



Exogenous influences on quarter milk cell counts with special emphasis on udder health status



Milchwissenschaft 45(5): 286-290



The influence of exogenous factors on the milk cell count with regard to prior udder health was investigated on 29 German Holstein Friesian cows, which were exposed to the stress factor "turning out to pasture" (25 cows) or treated subcutaneously with 5 ml of a foot and mouth vaccination without any disturbance of the cows. The stress factor "turning out to pasture" did not cause any changes in cell count in healthy quarters (< 125.000 cells/ml), but it did so in subclinical diseased quarters. The vaccination with a foot and mouth vaccine did not lead to changes in cell count independently of the udder health status of the cows. It is concluded that increases in cell count as reported in connection with vaccinations against foot and mouth disease in the field are due to exogenous influences, e.g., stress during herd vaccination, and not to reaction caused by the vaccine itself.

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Accession: 001831247

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