Study to assess the reliability of a disc diffusion method for determining the sensitivity of gram-positive pathogens
J M Andrews1, J P Ashby, R Wise
1Department of Medical Microbiology, City Hospital NHS Trust, Birmingham, UK.
The Journal of Antimicrobial Chemotherapy
|June 25, 1999
Abstract:
A standardized method of disc testing the sensitivity of gram-positive pathogens to dalfopristin/quinupristin was developed, and then 'field tested' in ten centres in the UK. For a 15 microg disc, zone diameter breakpoints of 20 mm and 15 mm are suggested when organisms are tested on Iso-Sensitest agar and Iso-Sensitest agar supplemented with 5% whole horse blood, respectively.


