AHL Bacteriology section update on equine MIC plates

Durda Slavic, Sarah Lippert

Animal Health Laboratory, University of Guelph, Guelph, ON.                            

AHL Newsletter 2025;29(2):5.

The AHL bacteriology section will begin using a new MIC plate format for our equine cases starting in June 2025. On this new plate format, azithromycin, ticarcillin and ticarcillin/clavulanic acid are discontinued. However, the MIC range of otherantimicrobials on the plate is extended, providing better alignment with CLSI interpretation guidelines. In addition, minocycline has been added to the plate. Please contact the bacteriology laboratory at ahlbact@uoguelph.ca if you have any questions or concerns regarding this updated MIC equine test.