title: [Influenza-A as etiology of fever and respiratory insufficiency in adults hospitalized during an outbreak in Chile].
abstract: BACKGROUND
  Influenza-A (IA) occurs every winter, is mostly observed among outpatients.
  
  
  OBJECTIVE
  To describe the clinical and epidemiological characteristics of cases that required hospital admission during an outbreak in Chile in 1999.
  
  
  METHODS
  Adults subjects, with Influenza A confirmed by antigen detection test, hospitalized in the clinical hospital of the "Hospital Clínico de la Universidad Católica de Chile" between May and June, with fever or respiratory symptoms were studied. A special record was designed to register clinical, microbiological and therapeutic data.
  
  
  RESULTS
  Fifty five cases, 26 males, aged 15 to 91 years, were studied. Eighty four percent had chronic concomitant diseases and 9.1% were immunosuppressed. Clinical findings were fever in 873%, asthenia in 83.6%, cough in 93.6%, abnormal pulmonary signs in 69%, an elevated C-reactive protein (mean value of 11.6 +/- 7.1 mg/dL) and acute respiratory insufficiency in 54.5%. Cases were isolated in cohort or individual rooms and 38.2% were admitted to intensive or intermediate care units. Amantadine was prescribed to 52 patients and was well tolerated. Thirty three percent of cases developed pneumonia. These subjects were older; had more dyspnea and respiratory insufficiency than patients without pneumonia.
  
  
  CONCLUSIONS
  IA should be borne in mind when dealing with hospitalized adults, during epidemic outbreaks in the community. The clinical picture can resemble a serious bacterial infection. An early diagnosis allows the use of specific treatments, to decrease the risk of nosocomial spread and to avoid unnecessary use of antibiotics.
authors.affiliation: Departamento de Medicina Interna, Facultad de Medicina, Pontificia Universidad Católica de Santiago, Chile. rabagli@med.puc.cl
authors.forename: Ricardo
authors.initials: R
authors.lastname: Rabagliati
authors.forename: Rosana
authors.initials: R
authors.lastname: Benítez
authors.forename: Alicia
authors.initials: A
authors.lastname: Fernández
authors.forename: Pablo
authors.initials: P
authors.lastname: Gaete
authors.forename: Ana María
authors.initials: AM
authors.lastname: Guzmán
authors.forename: Patricia
authors.initials: P
authors.lastname: García
authors.forename: Marcela
authors.initials: M
authors.lastname: Ferrés
authors.forename: Carlos
authors.initials: C
authors.lastname: Pérez
authors.forename: Jaime
authors.initials: J
authors.lastname: Labarca
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002677:Chile / Q000453:epidemiology; D017714:Community-Acquired Infections / Q000453:epidemiology / Q000209:etiology; D004196:Disease Outbreaks; D005260:Female; D005334:Fever / Q000453:epidemiology* / Q000209:etiology; D006760:Hospitalization; D006801:Humans; D009980:Influenza A virus; D007251:Influenza, Human / Q000150:complications / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D011024:Pneumonia, Viral / Q000453:epidemiology / Q000209:etiology; D012128:Respiratory Distress Syndrome / Q000453:epidemiology / Q000209:etiology; D012131:Respiratory Insufficiency / Q000453:epidemiology* / Q000209:etiology
vernacular_title: Reconocimiento de influenza-A como etiología de síndrome febril e insuficiencia respiratoria en adultos hospitalizados durante brote en la comunidad.