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The objective of this study was to evaluate the effects of the procedure followed for udder drying-off (i.e.,progressive or abrupt cessation of lactation) on subsequent mammary infection and development of mastitis.In ewes of group A (n = 19),drying-off took place progressively during a period of 22 days while in ewes of group B (n = 12),udder drying-off took place abruptly.