FIG. 5.

TSST-1 production by S. aureus MN8 in thin-film cultures incubated in atmospheres containing various oxygen levels balanced with nitrogen only or with nitrogen and 7% CO₂. TSST-1 concentrations are shown for cultures incubated for 24 h in chambers initially flushed with the indicated gas mixture and then sealed. Data are means ± standard errors of the means of values from three separate thin-film cultures for which triplicate ELISA readings were performed for each culture.