title: [Clinical features and contagiousness of influenza A(H1N1) in health care workers and hospitalized patients in a Mexico City hospital].
abstract: BACKGROUND
  Respiratory infections increased in Mexico in 2009 due to an epidemic of influenza.
  
  
  METHODS
  To compare symptoms and infectivity of influenza A(H1N1) and seasonal influenza we evaluated epidemiological data and microbiological sampling of health workers (HW) and patients who probably had influenza.
  
  
  RESULTS
  From April to November 2009 we studied 83 HW (29 with influenza A(H1N1) and 8 with seasonal influenza) and 71 patients (26 and 11, respectively). The subtypes of influenza had similar clinical data.
  
  
  CONCLUSIONS
  Fifteen patients with immunosuppression or chronic diseases developed fatal pneumonia; the infectivity was greater for influenza A(H1N1).
authors.affiliation: División de Epidemiología Hospitalaria, Hospital de Especialidades del Centro Médico La Raza, México DF, México. ulises.angeles@imss.gob.mx
authors.forename: Ulises
authors.initials: U
authors.lastname: Angeles-Garay
authors.forename: José A
authors.initials: JA
authors.lastname: Gayosso Rivera
authors.forename: Yazmín
authors.initials: Y
authors.lastname: Zacate-Palacios
authors.forename: Miguel
authors.initials: M
authors.lastname: Rechy-Luna
authors.forename: Juan J
authors.initials: JJ
authors.lastname: Terrazas Estrada
authors.forename: Rafael
authors.initials: R
authors.lastname: Arias-Flores
mesh_terms: D000328:Adult; D000368:Aged; D000998:Antiviral Agents / Q000627:therapeutic use; D015897:Comorbidity; D016358:Contact Tracing; D003428:Cross Infection / Q000453:epidemiology / Q000635:transmission / Q000821:virology; D004196:Disease Outbreaks; D005260:Female; D017052:Hospital Mortality; D006786:Hospitals, Urban / Q000706:statistics & numerical data*; D006801:Humans; D016867:Immunocompromised Host; D017758:Infectious Disease Transmission, Patient-to-Professional / Q000706:statistics & numerical data; D017757:Infectious Disease Transmission, Professional-to-Patient / Q000706:statistics & numerical data; D053118:Influenza A Virus, H1N1 Subtype / Q000302:isolation & purification / Q000472:pathogenicity*; D007251:Influenza, Human / Q000188:drug therapy / Q000453:epidemiology* / Q000517:prevention & control / Q000635:transmission / Q000821:virology; D007297:Inpatients / Q000706:statistics & numerical data*; D008297:Male; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D009369:Neoplasms / Q000453:epidemiology; D009784:Occupational Diseases / Q000188:drug therapy / Q000453:epidemiology / Q000821:virology; D053139:Oseltamivir / Q000627:therapeutic use; D010564:Personnel, Hospital / Q000706:statistics & numerical data*; D014774:Virulence; D053243:Zanamivir / Q000627:therapeutic use
chemical_list: D000998:Antiviral Agents; D053139:Oseltamivir; D053243:Zanamivir