Listeriosis surveillance.
D017088:AIDS-Related Opportunistic Infections / Q000453:epidemiology; D003430:Cross-Sectional Studies; D004739:England / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D008088:Listeriosis / Q000453:epidemiology*; D011159:Population Surveillance; D014852:Wales / Q000453:epidemiology