Susceptibility of log-phase S aureus, S epidermis, K pneumoniae, and P aeruginosa to varying concentrations of NO in LB media (0 μmol/L, 3 μmol/L, 6 μmol/L, and 30 μmol/L). Individual bacteria CFUs/mL were calculated at 0, 3, and 6 hours after initiation of treatment with NO. The data are mean ± standard error of 3 individual observations. CFUs = colony forming units; LB = Luria-Bertani; NO = nitric oxide.