In vitro determination of the antibiotic susceptibility of biofilm-forming Pseudomonas aeruginosa and Staphylococcus aureus: possible role of proteolytic activity and membrane lipopolysaccharide

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2013
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Abstract
In vitro determination of the antibiotic susceptibility of biofilm-forming Pseudomonas aeruginosa and Staphylococcus aureus: possible role of proteolytic activity and membrane lipopolysaccharide Majed M Masadeh,1 Nizar M Mhaidat,2 Karem H Alzoubi,2 Emad I Hussein,3 Esra’a I Al-Trad41Department of Pharmaceutical Technology, 2Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan; 3Department of Biological Sciences, Yarmouk University, Irbid, Jordan; 4Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, Jordan University of Science and Technology, Irbid, JordanAbstract: We carried out a comprehensive overview of inhibitory effects of selected antibiotics on planktonic and biofilm cells of Staphylococcus aureus (ATCC 29213) and Pseudomonas aeruginosa (ATCC 27853) strains. The possible involvement of protease activity and the lipopolysaccharide (LPS) profile of P. aeruginosa were also analyzed. Biofilm cells of both strains were more resistant to antibiotics than their planktonic counterparts. Protease activity was increased in both strains in the biofilm forms. Challenge with sublethal doses of antibiotics also increased proteolytic activity of biofilm cells. Additionally, the LPS profile of P. aeruginosa showed pattern alterations of the biofilm that can contribute to biofilm resistance and survival. These observations provide evidence for the involvement of bacterial proteolytic activity and LPS profile in the resistance of biofilm bacteria to antibiotics compared to their planktonic counterparts.Keywords: biofilm, Pseudomonas aeruginosa, Staphylococcus aureus, proteolytic activity, lipopolysaccharide
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Authors Majed M Masadeh;Nizar M Mhaidat;Karem H Alzoubi;Emad I Hussein;Esra’a I Al-Trad and
Journal Infection and drug resistance
Year 2013
DOI
10.2147/IDR.S41501
URL
Keywords Keywords not found

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