QUALITY-CONTROL OF AGAR DIFFUSION SUSCEPTIBILITY TESTS - DATA FROM THE QUALITY ASSURANCE SERVICE MICROBIOLOGY PROGRAM OF THE COLLEGE-OF-AMERICAN-PATHOLOGISTS

  • 1 January 1979
    • journal article
    • research article
    • Vol. 72  (2) , 365-370
Abstract
Since its beginning in 1974 over 180 laboratories have participated in the Microbiology Program of the College of American Pathologists Quality Assurance Service (QAS) submitting 2,372,000 individual antibiotic determinations on 3 quality control reference strains. Of these determinations, 89.5% were obtained using the standard Bauer-Kirby method; 8.4% using the agar overlay modification of Barry and associates. Standard statistical analysis of data obtained using the Bauer-Kirby method were reported for each antimicrobic/reference strain combination. Comparison were made between the QAS data and those data obtained in earlier collaborative studies which currently serve as precision and accuracy control limits. In many cases, QAS data exceed the existing control limits.

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