Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/59168
Title: Predictive models for the occurrence of viable but non-culturable (VBNC) bacteria under various environmental stresses
Authors: Goh, S.G.
Gin, K.Y.H. 
Panda, N.R.
Keywords: Bacteria indicator
Enterococcus
Public health
Stress
Survival
Viable but non-culturable
Issue Date: 2011
Citation: Goh, S.G., Gin, K.Y.H., Panda, N.R. (2011). Predictive models for the occurrence of viable but non-culturable (VBNC) bacteria under various environmental stresses. Water Practice and Technology 6 (4) : -. ScholarBank@NUS Repository.
Abstract: The survival of Enterococcus faecalis under different environmental stresses (salinity, starvation and sunlight) were examined under controlled conditions in the laboratory. Different decay kinetics were observed for measurements of the bacteria using a culture-based method and a molecular technique (PMA-qPCR). The cell counts for the culture-based method were found to be generally lower than PMA-qPCR over time in the stressed microcosms. This phenomenon suggests the entry of the cells into another physiological state i.e. the viable but non-culturable (VBNC) state. The difference between the two enumeration methods (i.e. the VBNC cells) was modelled as a function of environmental variables. The decay coefficients (k values) showed a strong correlation with light irradiation. In addition, this study demonstrated the ability of E.faecalis to adapt to a wide range of salinity. Models were developed to predict the occurrence of VBNC cells under stressed conditions from light irradiation. These models can enhance current water quality models by providing a more accurate picture of the microbial community's survival characteristics. © IWA Publishing 2011.
Source Title: Water Practice and Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/59168
ISSN: 1751231X
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

3
checked on May 26, 2018

Page view(s)

64
checked on Aug 3, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.