The Growth Kinetics of Pathogenic Microorganisms Under Conditions Modelling the Vital Functions of Iron-Oxidizing Bacteria

Supplying people with pure and safe water is a great challenge all over the world. Concentrations of iron in drinking water are normally less than 0.3 mg/l but may be higher in countries where underground water with high concentrations of iron salts, and galvanized iron pipes are used for water dist...

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Bibliographic Details
Published in:BioNanoScience 2022, Vol.12 (1), p.149-153
Main Authors: Leonov, Vadim, Leonova, Lyubov, Cherepanov, Denis, Savin, Leonid, Tkalich, Anna, Petrovskaya, Yulia, Trizna, Elena, Ananina, Irina
Format: Article
Language:English
Subjects:
Bacteria
Biofilms
Biofouling
Biological and Medical Physics
Biomaterials
Biophysics
Circuits and Systems
Drinking water
Engineering
Ferric hydroxide
Galvanized iron
Iron-oxidizing bacteria
Microorganisms
Modelling
Nanotechnology
Oxidation
Pathogens
Pipes
Salmonella
Salts
Survival
Virulence
Water distribution
Water engineering
Water supply
Water utilities
Waterworks
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Summary:Supplying people with pure and safe water is a great challenge all over the world. Concentrations of iron in drinking water are normally less than 0.3 mg/l but may be higher in countries where underground water with high concentrations of iron salts, and galvanized iron pipes are used for water distribution. Iron promotes undesirable bacterial growth (iron-oxidizing bacteria) within a waterworks and distribution system, resulting in the deposition of a brown slimy coating (biofouling) on the piping. Iron biofouling in water does not usually present a health risk. It may present some concern if pathogenic bacteria, which require iron to grow and increase virulence, have entered a water supply system. In this study, the viability of pathogenic microorganisms ( Salmonella spp., K. pneumoniae , S. aureus , P. aeruginosa ) under conditions modelling the water supply pipes containing iron-oxidizing bacteria has been investigated. For that, the activity of iron-oxidizing bacteria was modelled in LB broth along with the addition of the hydrosol of ferric hydroxide ( F e ( O H ) 3 s o l ) at final concentrations of 0.04–3.0 mM. Based on the experimental data, studied pathogens can be arranged as S . e n t e r i t i d i s > K . p n e u m o n i a e > P . a e r u g i n o s a > S . a u r e u s by decreasing of their survival ability in presence of ( F e ( O H ) 3 s o l ) in the broth and biofilm. These data suggest that the full-scale revision of standards regulation drinking water is strictly required because of the potential of iron and iron-oxidizing bacteria to provide the survival of the dangerous pathogens via protection in biofilms.
ISSN:2191-1630
2191-1649
DOI:10.1007/s12668-021-00929-z