Magdalena Pezzoni

TL;DR: In this article, the protection role of KatA catalase in both planktonic cells and biofilms of Pseudomonas aeruginosa against UVA radiation was determined by using the wild-type (PAO1) and an isogenic Catalase deficient strain (katA).

TL;DR: In this paper, titania-silica bilayer mesoporous thin film (MTF) coatings have been produced and loaded with silver species, and their bactericidal efficiency against Pseudomonas aeruginosa and Staphylococcus aureus was assessed over time.

TL;DR: It is demonstrated that exposure of planktonic cells to sublethal doses of UVA can increase cell surface hydrophobicity and swimming motility, two parameters known to favor cell adhesion, suggesting that UVA radiation acts, at least in part, by promoting the first stages of biofilm development.

TL;DR: It is demonstrated that UVA radiation induces σE activity in a pathway that is dependent on the stringent response regulator ppGpp, and rpoE has a role in the defence against lethal UVA doses that is mediated by functions that are dependent on and independent of the alternative sigma factor RpoS.

TL;DR: It is demonstrated that exposure to low UVA produced a protective effect against subsequent lethal doses of UVA, sodium hypochlorite and H2O2, demonstrating that different mechanisms are involved in the defence against these oxidative agents, although both genes can beinvolved in the global cellular response.