title: Occurrence of Yersinia pseudotuberculosis in iceberg lettuce and environment.
authors.affiliation: Department of Food and Environmental Hygiene, Faculty of Veterinary Medicine, University of Helsinki, Finland.
authors.forename: Taina
authors.initials: T
authors.lastname: Niskanen
authors.forename: Maria
authors.initials: M
authors.lastname: Fredriksson-Ahomaa
authors.forename: Hannu
authors.initials: H
authors.lastname: Korkeala
mesh_terms: D000391:Air Microbiology; D016022:Case-Control Studies; D004196:Disease Outbreaks; D005387:Finland / Q000453:epidemiology; D006801:Humans; D018545:Lactuca / Q000382:microbiology*; D012722:Sewage / Q000382:microbiology; D012988:Soil Microbiology; D014871:Water Microbiology; D014881:Water Supply; D015011:Yersinia pseudotuberculosis / Q000302:isolation & purification*; D015012:Yersinia pseudotuberculosis Infections / Q000453:epidemiology*
chemical_list: D012722:Sewage