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- W2037034673 abstract "Objectives To determine if either ATP or endotoxin concentrations in water supplied by dental unit water systems (DUWS) correlated with total viable counts (TVC), and therefore could be used as a rapid, chairside measure of levels of microbial contamination. Design A prospective trial. Method Fifty-seven water samples were taken from the 'triple spray', air rotor and source water supplies from 25 dental units in eight practices. The samples were assayed for endotoxin concentration, total ATP and TVC. A pilot study was performed to assess the relationship between TVC and total cell counts, as determined by flow cytometry. Results ATP concentrations ranged from 22 to 958 relative light units (RLU) and free endotoxin ranged from 25 to 600 EU ml−1. TVC varied from not detected to 2.16 × 104 CFU ml−1. The ATP method proved to be a simple and rapid method that could be used at the chairside. However, there was no correlation between ATP or endotoxin concentrations and TVC in DUWS. TVC generally underestimated the total cell count by 50 to 500 fold. Conclusion Half of the water samples from DUWS exceeded recommended levels of TVC. However, ATP and endotoxin concentrations in DUWS water samples did not correlate with these TVC data and therefore could not be recommended as an alternative assay to TVC for measuring bacterial contamination or for monitoring water treatment efficacy." @default.
- W2037034673 created "2016-06-24" @default.
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- W2037034673 date "2004-02-01" @default.
- W2037034673 modified "2023-09-23" @default.
- W2037034673 title "Measuring bacterial contamination in water units" @default.
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- W2037034673 doi "https://doi.org/10.1038/sj.bdj.4810940" @default.
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