Preventing the spread early is an excellent time to begin a control program. The calving area must be kept very clean and dry. The calving pen should only be used for calving by one animal at a time. The calf should be removed immediately from the dam, because she may be shedding bacteria. Infected beef dams and calves can be isolated until the cow can be salvaged and the calf placed in a feedlot for slaughter-only.
Some dams shed the bacteria in their colostrum and milk.
Negative-testing dams should be selected as sources of colostrum. Milk replacer is recommended in highly infected dairy herds. Young Breeding Stock Separation of young breeding animals from older stock must continue as they mature. Greater distances and longer separations from older, infected animals decrease the likelihood of infection. When field isolation is not possible, walls, panels, or double fences can create barriers or buffer zones.