2.9.1. Bacteria and Culture Conditions

For bacterial strains were used: one gram positive strain, Staphylococcus aureus (ATCC 49444), and three gram negative strains, namely *Pseudomonas aeruginosa* (ATCC 27853), *Salmonella typhimurium* (ATCC 14028) and *Escherichia coli* (ATCC 25922). The strains were cultured on Muller-Hinton agar stored at 4 ◦C.
