Assessment of Bacillus subtilis Spores as a Possible Bioindicator for Evaluation of the Microbicidal Efficacy of Radiation Processing of Water
| Autor: | Peter Gehringer, Thomas Haider, Helmut Eschweiler, Walter Pribil, Regina Sommer, Alexander Cabaj |
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| Rok vydání: | 2007 |
| Předmět: |
Microorganism
Colony Count Microbial Bacillus subtilis Water Purification Microbiology Ionizing radiation Radiation Ionizing Environmental Chemistry Water Pollutants Food science Waste Management and Disposal Water Science and Technology Spores Bacterial biology Ecological Modeling fungi Dose-Response Relationship Radiation Hydrogen Peroxide biology.organism_classification Pollution Spore Disinfection Oxygen Water treatment Bioindicator Bacteria Environmental Monitoring Bioaerosol |
| Zdroj: | Water Environment Research. 79:720-724 |
| ISSN: | 1061-4303 |
| DOI: | 10.2175/106143007x175889 |
| Popis: | Gamma and electron-beam irradiation of Bacillus subtilis spores suspended in different types of water was studied to evaluate the inactivation of the spores and assess their possible use as a bioindicator for radiation processing. We found that the inactivation proceeded endogenously, being dose-rate-dependent and affected by oxygen. The radiation resistance of the suspended spores was found to be rather high; therefore, B. subtilis spores used as a bioindicator for efficiency of water treatment by radiation under practical conditions might result in the spores being overly conservative surrogates for pathogenic microorganisms. Moreover, the doserate dependency impedes the use of the spores as a bioindicator. Thus, B. subtilis spores cannot be recommended as a bioindicator for evaluation of the microbicidal efficacy of ionizing radiation processing of water. |
| Databáze: | OpenAIRE |
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