Fig. 1

Determination of the antibacterial activity of free drugs and NLCs against planktonic drug-resistant MRSA:  a the time-killing curves of ciprofloxacin (0.5 µg/ml) and rolipram (0.2 µg/ml); and b the time-killing curves of ciprofloxacin (1 µg/ml) and rolipram (0.4 µg/ml). All data are expressed as the mean ± SEM (n = 3). MRSA, methicillin-resistant Staphylococcus aureus; OD, optical density; SEM, standard error of mean