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Induction of Escherichia coli into a VBNC state through chlorination/chloramination and differences in characteristics of the bacterium between states by Sheng Chen; Xi Li; Yahong Wang; Jie Zeng; Chengsong Ye; Xianping Li; Lizheng Guo; Shenghua Zhang; Xin Yu is a Environmental Science article available to read on EtoBox.
What is Induction of Escherichia coli into a VBNC state through chlorination/chloramination and differences in characteristics of the bacterium between states about?
Many pathogens can enter into a viable but nonculturable (VBNC) state in response to harsh environmental stresses. Bacteria in this state can retain certain features of viable cells, such as cellular integrity, metabolic activity, or virulence and may present health risks associated with drinking water. In this study, we investigated the ability of chlorination and chloramination, which are widely used methods to disinfect drinking water, to induce Escherichia coli into a VBNC state. After treatment with chlorine and chloramine at concentrations of 1, 2, 3, and 4 mg/L, the counts of culturable E. coli cells decreased from 10 6 CFU/mL to 0 CFU/mL at 5-60 min post treatment. Meanwhile, viable cell counts were still approximately 10 3 -10 5 cells/mL. These viable E. coli cells may be induced into a VBNC state by chlorination and chloramination. Scanning electron microscopy and laser confocal microscopy showed that some bacteria maintained cellular integrity, but the average length of VBNC cells was less than that of culturable cells. Respiratory activity of VBNC cells decreased approximately 50% relative to that of culturable cells. We also used heavy water (D 2 O) combined with Raman
Who reads Induction of Escherichia coli into a VBNC state through chlorination/chloramination and differences in characteristics of the bacterium between states?
It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Sheng Chen; Xi Li; Yahong Wang; Jie Zeng; Chengsong Ye; Xianping Li; Lizheng Guo; Shenghua Zhang; Xin Yu
- Publisher
- Elsevier BV
- Published
- 2018
- Language
- EN
- Field
- Environmental Science (Physical Sciences)