Abstract: Dairy ketosis is a group-occuring metabolic disease proceed from carbohydrate and fat metabolism disorders in the transition period in the dairy cow. The main pathological characteristics are ketonemia, ketonuria, ketone breast disease, and ketosis is associated with hypoglycemia, elevated plasma NEFA, fatty liver disease, and low concentration of blood glycogen. Dairy ketosis can be seen frequently on high producing dairy cow and caused heavy loss for dairy farm. It is very important meaning that ketosis is prevented and treated timely and effectively for increasing breeding level of dairy cow.

Key words: dairy cow; ketosis; negative energy balance