Effect of antimicrobial residues on early adhesion and biofilm formation by wild-type and benzalkonium chloride-adapted Pseudomonas aeruginosa

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Idalina Machado (Author) Other; Graca, J (Author) Other; Sousa, AM (Author) Other; Lopes, SP (Author) Other; Pereira, MO (Author) Other

Journal

Title: Biofouling

Vol. 27

Pages: 1151-1159

ISSN: 0892-7014

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 13 Citations

Other information

Authenticus ID: P-002-W81

DOI: 10.1080/08927014.2011.636148

Abstract (EN): Antimicrobial residue deposition can change the physico-chemical properties of bacteria and surfaces and thus promote or impair bacterial adhesion. This study focuses on benzalkonium chloride (BC) deposition on polystyrene (PS) surfaces and the influence of this conditioning film on the physico-chemical properties of PS and on early adhesion and biofilm formation by Pseudomonas aeruginosa wild-type and its laboratory BC-adapted strain. The latter readily acquired the ability to grow in BC, and also exhibited physico-chemical surface changes. The existence of residues on PS surfaces altered their hydrophobicity and favoured adhesion as determined by the free energy and early adhesion characterization. Adapted bacteria revealed a higher ability to adhere to surfaces and to develop biofilms, especially on BC-conditioned surfaces, which thereby could enhance resistance to sanitation attempts. These findings highlight the importance of investigations concerning the antimicrobial deposition effect after cleaning procedures, which may encourage bacterial adhesion, especially of bacteria that have been previously exposed to chemical stresses.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9