Document Detail

Disinfection of Legionella pneumophila by photocatalytic oxidation.
MedLine Citation:
PMID:  17224169     Owner:  NLM     Status:  MEDLINE    
Photocatalytic oxidation (PCO) was proven to be efficacious in the inactivation of Legionella pneumophila serogroup 1 Strains 977, 1009, 1014 and ATCC 33153. The local (Strains 997, 1009 and 1014) and ATCC (Strain 33153) strains showed sensitivity differences towards PCO. The inactivation mechanisms of PCO were investigated by transmission and scanning electron microscopy by which PCO was found to disintegrate the cells eventually. Before the disintegration, there was lipid peroxidation of outer and cytoplasmic membrane causing holes formation and leading to the entry of OH into the cells to oxidize the intracellular components. Fatty acid profile analysis found that the amount of saturated, 16-carbon branched-chain fatty acid, which is predominant in Legionella, decreased in the surviving populations from PCO. A relationship between the amount of this fatty acid and the PCO sensitivity of the tested strains was also observed. Mineralization of cells by PCO was proven by total organic carbon analysis.
Y W Cheng; Raphael C Y Chan; P K Wong
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-01-16
Journal Detail:
Title:  Water research     Volume:  41     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-01-29     Completed Date:  2007-04-20     Revised Date:  2010-10-01    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  842-52     Citation Subset:  IM    
Department of Biology, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China.
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MeSH Terms
Antigens, Bacterial / metabolism
Cell Membrane / metabolism
Disinfection / instrumentation,  methods*
Fatty Acids / analysis
Legionella pneumophila* / classification,  growth & development,  metabolism
Legionnaires' Disease / prevention & control*
Lipid Peroxidation
Microscopy, Electron, Scanning
Microscopy, Electron, Transmission
Reg. No./Substance:
0/Antigens, Bacterial; 0/Fatty Acids
Erratum In:
Water Res. 2010 Mar;44(6):2075

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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