The study investigated the incidence of Listeria monocytogenes in ready- to- eat ( RTE ) vegetables: (Cucumber, Cucumis sativas ; Cabbage, Brassica olerecea ; Carrot, Daucus carota ; Tomato, Solanum lycopersicum ; Lettuce, Lactuca sativa ) in six states in South- Western Nigeria . A total of 555 composite samples were collected from 30 traditional markets within the states and only 244 L. monoc…