FIG 3.

Effects of subinhibitory antibiotics on MRSA 04-014 TSST-1 production. MRSA 04-014 was cultured in the presence of subinhibitory doses (1/16, 1/8, or 1/4 the MIC) of antibiotic, and results were compared to those seen with a no-treatment (NT) control. TSST-1 production (in nanograms per milliliter) was determined by ELISA. Error bars represent the standard errors of results of comparisons between biological replicates (n = 3). An asterisk (*) indicates that data are significantly different from those determined with the NT control (P ≤ 0.05) based on an ANOVA with false-discovery-rate adjustments.