Johne’s disease is caused by the bacterium Mycobacterium paratuberculosis, and has a significant impact on dairy herds causing a drop in milk production and the need to cull infected animals. It is estimated that it can cause losses of as much as $200,000 per year in a herd of 1,000 dairy cows. The increasing number of cases of Johne's disease suggests that there may be unknown sources of contamination on farms.
Research by the Agricultural Research Service (ARS) has suggested two tips for preventing Johne's disease on dairy farms: Use stainless steel water troughs and add chlorine to the water.
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