Fig 1.

Survival curves of Salmonella Typhimurium STCC 878 (■) and STCC 443 (●), Salmonella Senftenberg STCC 4384 (▲) and ATCC 43858 (○), and Salmonella Enteritidis ATCC 13076 (△) in McIlvaine buffer adjusted to a pH of 7.0, with an absorption coefficient of 10.81 cm⁻¹. Stationary-phase cultures were prepared by inoculating 50 ml of fresh TSBYE and incubated for 24 h at 35°C, which resulted in stationary-phase cultures containing approximately 10⁹ CFU ml⁻¹. The UV equipment consisted of eight annular thin-film flowthrough reactors connected in series with a sampling valve at the exit of each reactor. The annular gap, where liquid flowed, was 2.5 mm. The recovery medium was TSAYE. Plates were incubated for 24 h at 35°C before survival counts.