title: Salmonella Cerro isolated over the past twenty years from various sources in the US represent a single predominant pulsed-field gel electrophoresis type.
abstract: Salmonella Cerro prevalence in US dairy cattle has increased significantly during the past decade. Comparison of 237 Salmonella isolates collected from various human and animal sources between 1986 and 2009 using pulsed-field gel electrophoresis, antimicrobial resistance typing, and spvA screening, showed very limited genetic diversity, indicating clonality of this serotype. Improved subtyping methods are clearly needed to analyze the potential emergence of this serotype. Our results thus emphasize the critical importance of population-based pathogen surveillance for the detection and characterization of potentially emerging pathogens, and caution to critically evaluate the adequacy of diagnostic tests for a given study population and diagnostic application.
authors.affiliation: Department of Food Science, Cornell University, Ithaca, NY 14850, USA. kh294@cornell.edu
authors.forename: K
authors.initials: K
authors.lastname: Hoelzer
authors.forename: K J
authors.initials: KJ
authors.lastname: Cummings
authors.forename: E M
authors.initials: EM
authors.lastname: Wright
authors.forename: L D
authors.initials: LD
authors.lastname: Rodriguez-Rivera
authors.forename: S E
authors.initials: SE
authors.lastname: Roof
authors.forename: A I Moreno
authors.initials: AI
authors.lastname: Switt
authors.forename: N
authors.initials: N
authors.lastname: Dumas
authors.forename: T
authors.initials: T
authors.lastname: Root
authors.forename: D J
authors.initials: DJ
authors.lastname: Schoonmaker-Bopp
authors.forename: Y T
authors.initials: YT
authors.lastname: Grohn
authors.forename: J D
authors.initials: JD
authors.lastname: Siler
authors.forename: L D
authors.initials: LD
authors.lastname: Warnick
authors.forename: D D
authors.initials: DD
authors.lastname: Hancock
authors.forename: M A
authors.initials: MA
authors.lastname: Davis
authors.forename: M
authors.initials: M
authors.lastname: Wiedmann
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology*; D016521:Electrophoresis, Gel, Pulsed-Field; D006801:Humans; D012480:Salmonella Infections / Q000382:microbiology*; D012481:Salmonella Infections, Animal / Q000382:microbiology*; D019779:Salmonella enterica / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D012703:Serotyping; D014481:United States