title: Tentative direct antimicrobial susceptibility testing in urine.
abstract: OBJECTIVE
  Tentative direct disk susceptibilities in bacteriuria compared to standard techniques were reevaluated.
  
  
  METHODS
  A sterile cotton swab was saturated with urine and uniformly streaked over the surface of a Mueller-Hinton agar plate. Susceptibility disks were added within 5 minutes and the zone of inhibition around the antibiotic disk was read after 16 to 18 hours of incubation.
  
  
  RESULTS
  The tentative direct susceptibilities showed an accuracy of 98.2% compared to standard techniques in 2,906 positive pure cultures. The false-positive rate was 0.53% and the false-negative rate was 0.14%.
  
  
  CONCLUSIONS
  Results of tentative direct antibiotic susceptibility in bacteriuria are comparable to those of standard techniques and are obtained 24 hours sooner.
authors.affiliation: Department of Urology, University of Virginia, Charlottesville, USA.
authors.forename: J Y
authors.initials: JY
authors.lastname: Gillenwater
authors.forename: M M
authors.initials: MM
authors.lastname: Clark
mesh_terms: D001419:Bacteria / Q000187:drug effects; D005188:False Negative Reactions; D005189:False Positive Reactions; D006801:Humans; D008826:Microbial Sensitivity Tests / Q000379:methods*; D014556:Urine / Q000382:microbiology*