The effects of disinfectant foam on microbial biofilms

This investigation examined the effects of common aqueous biocides and disinfectant foams derived from them on Pseudomonas aeruginosa biofilms. Biofilms were grown on stainless steel coupons under standardised conditions in a reactor supplemented with low concentrations of organic matter to simulate...

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Bibliographic Details
Published in:Biofouling (Chur, Switzerland) Switzerland), 2005-01, Vol.21 (2), p.141-149
Main Authors: Sreenivasan, Prem K, Chorny, Roberto C
Format: Article
Language:English
Subjects:
Amine oxide
Amines
Anti-Bacterial Agents
biofilm
Biofilms - drug effects
Cell Survival
Disinfectants - chemistry
Disinfectants - pharmacology
disinfection
ethylenediaminetetraacetic acid
foam
Hydrogen Peroxide - pharmacology
hypochlorite
Microscopy, Confocal
Microscopy, Electron, Scanning
Oxides
peracetic acid
Pseudomonas aeruginosa - drug effects
Pseudomonas aeruginosa - growth & development
Pseudomonas aeruginosa - ultrastructure
Sodium Hypochlorite - pharmacology
Solutions
Stainless Steel
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Summary:This investigation examined the effects of common aqueous biocides and disinfectant foams derived from them on Pseudomonas aeruginosa biofilms. Biofilms were grown on stainless steel coupons under standardised conditions in a reactor supplemented with low concentrations of organic matter to simulate conditions prevalent in industrial systems. Five-day-old biofilms formed under ambient conditions with continuous agitation demonstrated a low coefficient of variation (5.809%) amongst viable biofilm bacteria from independent trials. Scanning electron microscopy revealed biofilms on coupons with viable biofilm bacteria observed by confocal microscopy. An aqueous solution of a common foaming agent amine oxide (AO) produced negligible effects on bacterial viability in biofilms (p > 0.05). However, significant biofilm inactivation was noted with aqueous solutions of common biocides (peracetic acid, sodium hypochlorite, sodium ethylenediaminetetraacetic acid) with or without AO (p 
ISSN:0892-7014
1029-2454
DOI:10.1080/08927010500155694