title: [Comparative study of secretory IgA].
abstract: OBJECTIVE
  The aim of this study was measure and compare Secretory IgA levels in the respiratory tract.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  Neumology Department of General Hospital. La Raza Medical Center Mexico.
  
  
  METHODS
  There were 35 volunteers. Samples of sputum, washings nasopharyngeal and bronchial was obtained from thirty five patients with COPD. Measurement of SIgA levels was performed by nephelometric technique. Results is reported as ratio of SIgA concentration/Total proteins concentration named SIgA relative concentration. Correlation index was obtained of three type of samples.
  
  
  RESULTS
  The SIgA values of sputum, washings nasopharyngeal and bronchial was similar similar +/- 0.011, 0.064 +/- 0.007 and 0.082 +/- 0.017 respectively). Multiple correlation was r = 0.508 (p < 0.01).
authors.affiliation: Unidad de Investigación e Información de Enfermedades Respiratorias, Hospital General, CMN La Raza, IMSS, México.
authors.forename: F G
authors.initials: FG
authors.lastname: Rico Méndez
authors.forename: L F
authors.initials: LF
authors.lastname: Massey
authors.forename: L
authors.initials: L
authors.lastname: Rendón
authors.forename: J J
authors.initials: JJ
authors.lastname: Múgica
authors.forename: L
authors.initials: L
authors.lastname: Alvarez
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001991:Bronchitis / Q000276:immunology; D001992:Bronchoalveolar Lavage Fluid / Q000276:immunology*; D002908:Chronic Disease; D003430:Cross-Sectional Studies; D006801:Humans; D007071:Immunoglobulin A, Secretory / Q000032:analysis*; D008173:Lung Diseases, Obstructive / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D009305:Nasopharynx / Q000276:immunology*; D009391:Nephelometry and Turbidimetry; D013183:Sputum / Q000276:immunology*
chemical_list: D007071:Immunoglobulin A, Secretory
vernacular_title: Estudio comparativo de la IgA secretora.