Description

CLSI VET01 – Performance Standards for Antimicrobial Disk and Dilution Susceptibility Tests for Bacterial Isolated from Animals, Fifth Edition, VET01Ed5E, Includes Update (2019)

This standard covers the current recommended methods for disk diffusion susceptibility testing and the reference methods for determining minimal inhibitory concentrations of aerobic bacteria by broth macrodilution, broth microdilution, and agar dilution for veterinary use.

Supplemental tables for VET01 are published in CLSI document VET08.

Antimicrobial susceptibility testing is indicated for any organism that contributes to an infectious process warranting antimicrobialchemotherapy if its susceptibility cannot be reliably predicted from knowledge of the organism’s identity. Susceptibility tests aremost often indicated when the causative organism is thought to belong to a species capable of exhibiting resistance to commonlyused antimicrobial agents.

Various laboratory methods can be used to measure the in vitro susceptibility of bacteria to antimicrobial agents. In many veterinarymicrobiology laboratories, an agar disk diffusion method is used routinely for testing common, rapidly growing, and certainfastidious bacterial pathogens. Clinical and Laboratory Standards Institute standard VET01-Performance Standards forAntimicrobial Disk and Dilution Susceptibility Tests for Bacteria Isolated From Animals describes disk diffusion, as well asstandard broth dilution (macrodilution and microdilution) and agar dilution, and it includes a series of procedures to standardizethe way the tests are performed. The performance, applications, and limitations of the current CLSI-recommended methods arealso described. The supplemental information (VET08 tables) used with this standard represents the most current information forantimicrobial agent selection, interpretation, and quality control using the procedures standardized in VET01.