Patient's colonscopy was done with a colonoscope of unknown status of disinfection.Random cultures of three colonoscopes were taken and reported as positive for fungus two days later.It is unknown whether this patient's colonoscope was one of the three, as they were reportedly returned to service prior to knowing the culture results.The system 83 plus 9 washer-disinfectors in use have been cultured, and the results are pending.The 5.0 micron sediment pre-filter was changed out with reportedly blackened sediment-appearing debris in it.These filters are usually changed every 3 months, and this was the first time we have seen this.It is our belief that this occurred as a result of not adequately flushing the water supply when the heat exchanger was repaired two weeks ago.The tubing leading from the hospital water source to the system 83 plus 9 washer-disinfectors has since been changed.
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