Comparative study on 3 oral potassium formulations for treatment of hypokalemia in dairy cows.

Background: Hypokalemia is of clinical relevance in cattle. Different mostly empirical treatment options are suggested.

Hypothesis/objectives: To evaluate if oral administration of potassium influences the plasma concentration, the intracellular concentration in erythrocytes and in muscle, renal excretion of potassium, and to assess if there are differences in the efficacy of the potassium formulations.

Distinct phenotypic traits of Staphylococcus aureus are associated with persistent, contagious bovine intramammary infections.

Staphylococcus aureus causing persistent, recurrent bovine intramammary infections are still a major challenge to dairy farming. Generally, one or a few clonal lineages are predominant in dairy herds, indicating animal-to-animal transfers and the existence of distinct pathotypic traits. The aim of this study was to determine if long term persistence and spreading of S.