Oxidative stress involved in the antibacterial action of different antibiotics

ALBESA INÉS; BECERRA MARÍA CECILIA; BATTÁN PAOLA DEL CARMEN; PÁEZ PAULINA LAURA

Academic Press

Año: 2004 vol. 317 p. 605 - 605

p style="TEXT-ALIGN: justify; MARGIN: 0cm 0cm 0pt" class="MsoPlainText">Staphylococcus aureus and Escherichia coli sensitive to chloramphenicol incubated with this antibiotic suffered oxidative stress with increase of anion superoxide (O(2)(-)). This reactive species of oxygen was detected by chemiluminescence with lucigenin. S.aureus, E.coli, and Enterococcus faecalis sensitive to ciprofloxacin exhibited oxidative stress when they were incubated with this antibiotic while resistant strains did not show stimuli of O(2)(-). Other bacteria investigated was Pseudomonas aeruginosa, strains sensitive to ceftazidime and piperacillin presented oxidative stress in presence of these antibiotics while resistant strains were not stressed. Higher antibiotic concentration was necessary to augment O(2)(-) in P.aeruginosa biofilm than in suspension, moreover old biofilms were resistant to oxidative st