title: Detection of hospital outbreaks of influenza-like illness based on excess of incidence rates compared to the community.
abstract: The risk of nosocomial influenza-like illness (noso-ILI) compared with that of community-acquired ILI was calculated during 3 influenza seasons (2004-2007) at a 1100-bed university hospital with a total of 21,519 hospitalized patients. Outbreaks of noso-ILI occurred in each season, although a protective effect against noso-ILI was also identified for other wards.
authors.affiliation: Epidemiology and Public Health Unit, Lyon 1 University, Lyon, France; Infection Control and Epidemiology Unit, Edouard Herriot Hospital, Lyon University Hospitals, Lyon, France. Electronic address: philippe.vanhems@chu-lyon.fr.
authors.forename: Philippe
authors.initials: P
authors.lastname: Vanhems
authors.affiliation: Epidemiology and Public Health Unit, Lyon 1 University, Lyon, France; Infection Control and Epidemiology Unit, Edouard Herriot Hospital, Lyon University Hospitals, Lyon, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Voirin
authors.affiliation: Epidemiology and Public Health Unit, Lyon 1 University, Lyon, France; Infection Control and Epidemiology Unit, Edouard Herriot Hospital, Lyon University Hospitals, Lyon, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Bénet
authors.affiliation: Department of Biostatistics, Lyon University Hospitals, Lyon, France; Biometry and Evolutive Biology Laboratory, Biostatistics and Health Unit, Lyon 1 University, Villeurbanne, France; National Center for Scientific Research, Mixt Research Unit 5558, Villeurbanne, France.
authors.forename: Sylvain
authors.initials: S
authors.lastname: Roche
authors.affiliation: National Reference Center for Influenzae Viruses, Virology Laboratory, Lyon University Hospitals, Bron, France; Viral Pathogenesis Laboratory (VIRPATH), Mixt Team of Research 4610, Claude Bernard University of Lyon, René-Théophile-Hyacinthe Laennec School of Medicine, Lyon 1 University, Lyon, France.
authors.forename: Vanessa
authors.initials: V
authors.lastname: Escuret
authors.affiliation: Epidemiology and Public Health Unit, Lyon 1 University, Lyon, France.
authors.forename: Corinne
authors.initials: C
authors.lastname: Régis
authors.affiliation: Infection Control and Epidemiology Unit, Edouard Herriot Hospital, Lyon University Hospitals, Lyon, France.
authors.forename: Marine
authors.initials: M
authors.lastname: Giard
authors.affiliation: National Reference Center for Influenzae Viruses, Virology Laboratory, Lyon University Hospitals, Bron, France; Viral Pathogenesis Laboratory (VIRPATH), Mixt Team of Research 4610, Claude Bernard University of Lyon, René-Théophile-Hyacinthe Laennec School of Medicine, Lyon 1 University, Lyon, France.
authors.forename: Bruno
authors.initials: B
authors.lastname: Lina
authors.affiliation: Department of Geriatrics, Edouard Herriot Hospital, Lyon University hospitals, Lyon, France.
authors.forename: Brigitte
authors.initials: B
authors.lastname: Comte
authors.affiliation: Department of Internal Medicine, Edouard Herriot Hospital, Lyon University Hospitals, Lyon, France.
authors.forename: Brigitte
authors.initials: B
authors.lastname: Coppéré
authors.affiliation: Department of Biostatistics, Lyon University Hospitals, Lyon, France; Biometry and Evolutive Biology Laboratory, Biostatistics and Health Unit, Lyon 1 University, Villeurbanne, France; National Center for Scientific Research, Mixt Research Unit 5558, Villeurbanne, France.
authors.forename: René
authors.initials: R
authors.lastname: Ecochard
mesh_terms: D017714:Community-Acquired Infections / Q000453:epidemiology* / Q000821:virology; D003428:Cross Infection / Q000453:epidemiology* / Q000821:virology; D004196:Disease Outbreaks; D005602:France / Q000453:epidemiology; D006761:Hospitals; D006801:Humans; D015994:Incidence; D007251:Influenza, Human / Q000453:epidemiology*; D011159:Population Surveillance; D011446:Prospective Studies
keywords: Clusters; Nosocomial; Respiratory; Viral infection