Figure 7.

Bacterial biofilm density after a 24-h incubation with vB_EfaS-271 phage lysate added to final titers of 10², 10⁴, 10⁶ or 10⁸ PFU/well. The results were estimated by measuring the optical density at a wavelength of 600 nm of the resuspended biofilms (A) or quantified densitometrically using the Quantity One program (B) from bacterial biofilm pictures (C). Error bars indicate the SD from triplicate experiments. Statistically significant differences (p < 0.001 in the t-test) between control and analyzed samples are marked by asterisks (***).