A study of mastitis bacteria and herdmanagement practices to identify their relationship to high somatic cell counts in bulk tank milk

摘要: Summary Thirty dairy herds, selected to cover a wide range of bulk tank somatic cell count (BTSCC) values, were used study the relationship between levels principal species mastitis-causing bacteria, herd management practices and BTSCC. A good. correlation was found number mastitis streptococci (Streptococcus agalactiae, S. dysgalactiae uberis) in milk Staphylococcus aureus less significantly correlated BTSCC, but increasing importance borderline BTSCC where lower excretion into unlikely trigger hygiene penalties so alert producers presence significant problem. High herds had yields likely use post-milking teat dip or have regular programme milking machine maintenance automatic cluster removal. These also tended buy replacements rather than breed their own. Overall high showed commitment implementing control procedures with consistently low