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Effect of UV light and sodium hypochlorite on formation and destruction of Pseudomonas fluorescens biofilm in vitro
ID Sigler Zekanović, Melani (Author), ID Begić, Gabrijela (Author), ID Mežnarić, Silvestar (Author), ID Jelovica Badovinac, Ivana (Author), ID Krištof, Romana (Author), ID Tomić Linšak, Dijana (Author), ID Gobin, Ivana (Author)

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Abstract
Pseudomonas fluorescens is one of the first colonizers of bacterial biofilm in water systems and a member of opportunistic premise plumbing pathogens (OPPPs). The aim of this study was to examine the effect of UV light and sodium hypochlorite on the formation and destruction of mature P. fluorescens biofilm on ceramic tiles. Planktonic bacteria or bacteria in mature biofilm were exposed to UV light (254 nm) for 5, 20 s. and to 0.4 mg/L sodium hypochlorite for 1 min. Mature biofilm was also exposed to increased concentration of sodium hypochlorite of 2 mg/L for 0.5, 1 and 2 h and combined with UV. Prolonged action of sodium hypochlorite and an increase in its concentration in combination with UV gave the best results in the inhibition of biofilm formation after the pretreatment and destruction of mature biofilm. The effect of hyperchlorination in combination with UV radiation shows better results after a long exposure time, although even after 120 min there was no completely destroyed biofilm. Furthermore, the mechanism of the effect of combined methods should be explored as well as the importance of mechanical cleaning that is crucial in combating bacterial biofilm in swimming pools.

Language:English
Keywords:biofilm, disinfection, opportunistic pathogens, Pseudomonas fluorescens, UV light
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:ZF - Faculty of Health Sciences
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2022
Year:2022
Number of pages:15 str.
Numbering:Vol. 10, no. 10, art. 1901
PID:20.500.12556/RUL-142784 This link opens in a new window
UDC:614:628.166
ISSN on article:2227-9717
COBISS.SI-ID:130886147 This link opens in a new window
Publication date in RUL:25.11.2022
Views:264
Downloads:51
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Record is a part of a journal

Title:Processes
Shortened title:Processes
Publisher:MDPI AG
ISSN:2227-9717
COBISS.SI-ID:523353113 This link opens in a new window

Licences

License:CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
Link:http://creativecommons.org/licenses/by-nc/4.0/
Description:A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.

Secondary language

Language:Undetermined
Keywords:biofilm, dezinfekcija, oportunistični patogeni, Pseudomonas fluorescens, UV svetloba

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