noun. an infectious disease of animals and humans (especially newborn or immunosuppressed persons) caused by the bacterium Listeria monocytogenes; in sheep and cattle the infection frequently involves the central nervous system and causes various neurological symptoms.
1. Noun, singular or mass Call your doctor immediately if you feel you might have listeriosis. 2. Adjective Usually listeriosis results in several days of nausea, low fever and diarrhea, but occasionally it's more severe.
