Scientific Publications - Work Done by Microbiology Reader Bioscreen C

Pastoni, F., Marengo, G. and Zampollo, F., Experimental Observations on the Presence of "Injured Cells" in Drinking Waters, Joint Research Centre, Environment Institute, Consumer Protection and Food Unit, Laboratory of Microbiology, 21020 Ispra, Italy, Report, 2000, 16 pp

ABSTRACT

Many chemical, physical and biological factors associated with water have the potential to induce stress or injury in bacterial cells. Damaged microorganisms, in particular, can be detected in water samples intended for human consumption which have been treated with disinfectants. This investigation was undertaken in order to collect experimental data on the presence of stressed or injured microorganisms in mineral water samples collected from various EU Countries which are not detectable using official methods of analysis. The study has been carried out through the application of a recently developed analytical procedure based on the study of bacteria and yeast growth kinetics. Analytical determinations verified the presence of stressed or injured microorganisms in reversible form in the examined water samples. The same samples frequently showed no microbial growth when analyzed using traditional methods of analysis. Therefore, in order to obtain a true indication of microbial numbers, the samples must be subjected to some form of procedure for the recovery of injured cells.

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Last modified: May 25, 2005