tomato sauce: sauce made with a puree of tomatoes (or strained tomatoes) with savory vegetables and other seasonings; can be used on pasta
sauce: flavorful relish or dressing or topping served as an accompaniment to food
listeria monocytogenes: the type species of the genus Listeria; can cause meningitis, encephalitis, septicemia, endocarditis, abortion, abscesses, listeriosis