title: A comparison of induced and expectorated sputum for the diagnosis of Pneumocystis carinii pneumonia.
abstract: OBJECTIVE
  To compare the sensitivities of expectorated and induced sputum for the diagnosis of Pneumocystis carinii pneumonia (PCP).
  
  
  METHODS
  Retrospective review.
  
  
  METHODS
  Academic medical center.
  
  
  METHODS
  Forty-five patients diagnosed as having PCP who had direct fluorescent antibody testing for P carinii on either expectorated or induced sputum.
  
  
  RESULTS
  Patients were stratified according to the method of sputum production (induced vs expectorated). The two groups were similar with respect to demographic characteristics, use of prophylaxis with aerosolized pentamidine, serum lactate dehydrogenase level, and arterial oxygen level. When only the initial sputum for each patient was analyzed, there was a similar sensitivity of induced sputum, positive in 10 of 18 samples (56%), and expectorated sputum, positive in 14 of 27 samples (52%) (p>0.05).
  
  
  CONCLUSIONS
  There was no significant difference in the sensitivity of induced and expectorated sputum for the diagnosis of PCP when the direct fluorescent antibody method of staining was used.
authors.affiliation: Department of Laboratory Medicine, University of Connecticut School of Medicine, Farmington, USA.
authors.forename: M L
authors.initials: ML
authors.lastname: Metersky
authors.forename: J
authors.initials: J
authors.lastname: Aslenzadeh
authors.forename: P
authors.initials: P
authors.lastname: Stelmach
mesh_terms: D017088:AIDS-Related Opportunistic Infections / Q000175:diagnosis*; D000328:Adult; D019085:Fluorescent Antibody Technique, Direct; D006801:Humans; D011020:Pneumonia, Pneumocystis / Q000175:diagnosis*; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013183:Sputum / Q000378:metabolism / Q000382:microbiology*