Figure 1.

Growth curves of the mastitis isolates Sa (a), Ssp6PD (b), Ssp01 (c), and Ssp5D (d) in absence or presence of CasuL, ampicillin, or tetracycline at their respective minimal inhibitory concentrations (MIC). The optical density (OD) at 600 nm was determined every hour for a period of 6 hr. For the negative control, cells were treated with distilled water instead of antibacterial agent. Data are expressed as the mean ± SD. All the MIC values can be seen in Table 1