Microflora of dental unit waterlines

Facilities treat water to control and prevent Legionella pneumophila proliferation, but there are still reported cases of Legionnaire\u27s disease. L. pneumophila can proliferate in amoebae that thrive in water systems. Understanding this relationship may help to reduce Legionella in DUWLs and prevent future infections as some studies have found three hundred times more amoebae in DUWL than tap water. Our study evaluated the presence of amoebae and other microorganisms in DUWLs. We hypothesized that there will be a higher concentration of amoeba and microbes in tap water and in DUWLs prior to a two minute flushing