The onset of infectious pathologies during the first weeks of lactation (60-80% of total pathologies in a dairy herd) is linked to immunosuppressior derived from nutritional/metabolic stressors and hormonal changes that take place around calving.Thisimmunosuppression is seen as a decreased activity of phagocytic cells, in several studies a reduction of 50% in the activity of neutrophils is being confirmed; and as a reduced ability of immune cells to migrate to infection sites.
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