UV-C pre-adaptation of Salmonella: effect on cell morphology and membrane fatty acids composition

• Published in: World journal of microbiology & biotechnology Vol. 30; no. 3; pp. 925 - 930
• Main Authors: Maâlej, Lobna, Chatti, Abdelwaheb, Khefacha, Sana, Salma, Kloula, David, Gottardi, Vannini, Lucia, Elizabetta, Guerzoni Maria, Hassen, Abdennaceur
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer-Verlag 01.03.2014; Springer Netherlands; Springer Nature B.V
• Subjects: Adaptation; Analysis; Applied Microbiology; Atomic force microscopy; Atomic properties; Bacteria; Biochemistry; Biomedical and Life Sciences; Biotechnology; cell biology; Cell Membrane - chemistry; Cell Membrane - radiation effects; Cell morphology; Cell surface; Cellular biology; Composition; Composition effects; Cytology; Environmental Engineering/Biotechnology; fatty acid composition; Fatty acids; Fatty Acids - analysis; Food contamination & poisoning; Grooves; Laboratories; Life Sciences; Lipids; Microbiology; Microscopy; Microscopy, Atomic Force; Morphology; Original Paper; Salmonella; Salmonella enterica - chemistry; Salmonella enterica - cytology; Salmonella enterica - radiation effects; Salmonella typhimurium; serotypes; Studies; Ultraviolet radiation; Ultraviolet Rays; Ultraviolet; Fatty acids; Morphology
• ISSN: 0959-3993; 1573-0972
• DOI: 10.1007/s11274-013-1510-2

The present study was carried out to evaluate the effects of ultraviolet radiations (UV-C) on the fatty acids composition of three serovars of Salmonella: S. typhimurium, S. hadar and S. zanzibar. Results obtained show that UV-C treatment increases significantly (P ≤ 0.05) the percentage of cyclic fatty acids. The atomic force microscopy was used to study the morphology and cell surface of irradiated strains. Results show that UV-C rays induce morphological changes and alter the bacterial cell surface (presence of grooves and irregularities).