A bacterial infection caused by Listeria monocytogenes. It occurs in newborns, elderly, and immunocompromised patients. The bacteria are transmitted through ingestion of contaminated food. Clinical manifestations include fever, muscle pain, respiratory distress, nausea, diarrhea, neck stiffness, irritability, seizures, and lethargy. The disease is listeriosis (MONDO_0005828). Also known as: Listeria infection, Listeria monocytogenes caused disease or disorder, Listeria monocytogenes disease or disorder, Listeria monocytogenes infectious disease, infection by Listeria monocytogenes.