Contagious, chronic, and often fatal, Johnes Disease is a bacterial infection that spreads stealthily throughout herds of ruminants such as cattle, sheep, and goats. Animals can be infected for years before presenting symptoms, which allows the disease to spread. There is no treatment for infected animals, which lose the ability to absorb nutrients. Sick animals must be removed from the herd. Learn more.
The Animal Health Institute (AHI) represents the companies that develop and produce animal medicines. Our industry is a global leader whose products improve the health of nearly 10 billion companion and food-producing animals in the U.S., which results in significant economic and social benefits for Americans.
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