About the Author

Listeriosis, also called Circling Disease and Silage sickness, is a life-threatening disease caused by bacteria Listeria monocytogenes and Listeria
ivanovii. Listeria is zoonotic and can be transferred to humans. It thrives in aerobic conditions and can withstand temperatures from 34-113 degrees F. It persists almost anywhere, including soil, manure piles, gastrointestinal tracts, the top layer of silage, and moldy hay or feed. It is also commonly found in the feces of infected birds, animals, fish, and insects as well as sewage.