Quality assurance tables 3a, 3b, & 3c list the 12 reference strains, the media, and the incubation conditions of testing and the expected range of zone sizes observed with each disc of a stated potency. Laboratories may find it useful to include a comment on the susceptibility report that the result reported with a particular antimicrobial indicates the susceptibility to another. This table is also updated regularly as data are accumulated which either invalidate the relationship or enable us to add agents to the list. The table is arranged according to bacterial species and the relationship between the antimicrobials is valid only for the species indicated. Surrogate disc testing tables 2a and 2b list those antimicrobials where the susceptibility can be inferred from the results obtained with a closely related agent, the “surrogate disc”. For organisms not included in the Table of calibrations, extrapolate the testing from that established for similar organisms. It is most important to pay particular attention to the footnotes included with each table as these highlight exceptions, restrictions and some specific directions. The tables are updated regularly and operators should ensure that they are using the latest versions of these tables. They list all the organisms and antimicrobials tested, the media used, conditions of incubation, disc potencies, cut off sizes for unusual annular radii and the MICs for susceptible strains (breakpoints). Antibiotics used in veterinary medicine only are flagged.Ĭalibration tables 1a, 1b, & 1c collectively summarise much of the basic information used in the CDS Test. These tables are intended for both Clinical and Veterinary laboratories. There are 4 sets of tables containing information essential for the performance of the CDS Test. A guide to the testing and reporting of β‑lactam antibiotics for Gram negative organisms. 5 11.4 Testing and reporting β‑lactam antibiotics.Reference strains: Gram Negative Organisms cont. Reference strains: Gram Negative Organisms Reference strains: Gram Positive Organisms cont. Reference strains: Gram Positive Organisms Surrogate disc testing: Gram Negative Organisms cont. Surrogate disc testing: Gram Negative Organisms Surrogate disc testing: Gram Positive Organisms cont. Surrogate disc testing: Gram Positive Organisms Calibrations: Gram Negative Organisms cont. Calibrations: Gram Positive Organisms cont.

Gram negative antibiotics chart