Journal of Antimicrobial Chemotherapy (2001) 48, 121-125
© 2001 The British Society for Antimicrobial Chemotherapy
Brief report |
Interpretative criteria and quality control parameters for telithromycin disc diffusion susceptibility tests
The Clinical Microbiology Institute, 9725 SW Commerce Circle, Wilsonville, OR 97070, USA
In vitro studies were carried out with 4175 Gram-positive clinical isolates, comparing telithromycin broth microdilution MICs with disc diffusion zone diameters. Provisional interpretive criteria for testing staphylococci were
23 mm for susceptible and
19 mm for resistant. Because pneumococci and other streptococci require increased CO2, the corresponding zone sizes are 3 mm smaller (
20 mm and
16 mm). Two collaborative studies were performed in order to propose the following quality control limits: 2430 mm for Staphylococcus aureus ATCC 25923 and 2733 mm for Streptococcus pneumoniae ATCC 49619.
* Corresponding author. Tel: +1-503-682-3232; Fax: +1-503-682-2065; E-mail: cmi{at}hevanet.com
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