title: [Frequency of respiratory viruses and clinical characteristics in children attending a care center in Mexico City].
abstract: OBJECTIVE
  To describe the frequency of respiratory viruses and clinical characteristics in children with respiratory signs and symptoms in a tertiary care center in Mexico.
  
  
  METHODS
  Patients with a clinical diagnosis of respiratory infection and a positive immunofluorescence result (Light Diagnostics) from January 2004 to October 2006 were included.
  
  
  RESULTS
  From the 986 nashopharyngeal samples, 138 (14%) were positive by immunofluorescence. The frequency was: 80% RSV, 8% parainfluenza 1, 5% parainfluenza 3, 2% adenovirus, 2% influenza A, 1% parainfluenza 2 and 1% influenza B.
  
  
  CONCLUSIONS
  Respiratory viruses were detected in 14% of samples tested. RSV was the most frequently identified virus and was associated with pneumonia and bronchiolitis in children younger than 3 years old.
authors.affiliation: Departamento de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, México, México. rmwong@correo.unam.mx
authors.forename: Rosa María
authors.initials: RM
authors.lastname: Wong-Chew
authors.forename: René
authors.initials: R
authors.lastname: Farfán-Quiroz
authors.forename: José Luis
authors.initials: JL
authors.lastname: Sánchez-Huerta
authors.forename: Margarita
authors.initials: M
authors.lastname: Nava-Frías
authors.forename: Jesús
authors.initials: J
authors.lastname: Casasola-Flores
authors.forename: José Ignacio
authors.initials: JI
authors.lastname: Santos-Preciado
mesh_terms: D000257:Adenoviridae Infections / Q000453:epidemiology; D000293:Adolescent; D001988:Bronchiolitis / Q000453:epidemiology / Q000821:virology; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D019084:Fluorescent Antibody Technique, Indirect; D006785:Hospitals, University / Q000706:statistics & numerical data*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007251:Influenza, Human / Q000453:epidemiology; D008297:Male; D008800:Mexico / Q000453:epidemiology; D009305:Nasopharynx / Q000821:virology; D018184:Paramyxoviridae Infections / Q000453:epidemiology; D011024:Pneumonia, Viral / Q000453:epidemiology / Q000821:virology; D018357:Respiratory Syncytial Virus Infections / Q000453:epidemiology; D012141:Respiratory Tract Infections / Q000453:epidemiology* / Q000821:virology; D012189:Retrospective Studies; D014505:Urban Population / Q000706:statistics & numerical data; D014777:Virus Diseases / Q000453:epidemiology*