2.4 Growth characterization
For the growth tests of each bacterial isolate, a preculture was prepared by growing an isolate in NYPSw medium described above at 25°C for 30 days. Then, 0.1 ml of the preculture was used to inoculate in 10 ml of Sw medium supplemented with various organic acids at 10 mM. The culture was then grown at 25°C for 30 days either aerobically or anaerobically. The resulting growth was determined by measuring at an optical density at 660 nm.