Cryptosporidiosis, a prevalent gastrointestinal parasitic disease, causes diarrhea, lethargy, and poor growth rates, especially in young ruminants. Infectious oocysts in the feces of infected animals spread directly from animal to animal or through contaminated food, water, fomites, or the environment. Cryptosporidiosis is zoonotic, with infected animals serving as a potential reservoir for infection of susceptible people. Learn more: https://mrkmnls.co/4g8ZF8r | The Merck Veterinary Manual