Clinical evaluation of new AMS GSC plus card

The AutoMicrobic System GSC Plus Card was compared to a broth microdilution reference method. Of 1660 minimum inhibitory concentration pairs, 86.1% were within 1 log2 dilution range. A total of 89.2% of the GSC Plus results agreed qualitatively (susceptible, moderately susceptible, resistant). If chloramphenicol data are excluded, agreement is 88.8% and 89.9%, respectively. A total of only 0.90% results were very major or major discrepancies. This is significantly fewer major discrepancies than reported with other systems.