Methods for antimicrobial susceptibility testing

摘要

A method for determining the susceptibility of bacteria in a clinical sample comprising urine or an inoculant derived therefrom to an antibiotic agent may include the steps of a) inoculating a test portion of the clinical sample in a medium containing a predetermined concentration of the antibiotic agent; b) inoculating a control portion of the clinical sample in a medium that does not contain the antibiotic agent; c) incubating the test portion for an incubation period; d) incubating the control portion for the incubation period; e) determining a quantity of RNA in the test portion and a quantity of RNA in the control portion at the conclusion of the incubation period that is less than 480 minutes after the completion of step a); and f) determining a susceptibility of the bacteria to the antibiotic agent by comparing the quantity of RNA in the test portion to the quantity of the RNA in the control portion.