Figure 2.

Growth curves of the mastitis isolates Sa (a), Ssp01 (b), and Ssp6PD (c) in absence or presence of CasuL‐tetracyline (a,c) or CasuL‐ampicillin (b) synergic combinations. 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. The concentration of CasuL and antibiotics in the synergic combinations can be seen in Table 2