Growth and Identification of Bacteria in N-Halamine Dental Unit Waterline Tubing Using an Ultrapure Water Source

Table 1

Geometric mean number of bacteria (CFU/mL) in Source Reservoir and inside surfaces of test and control lines.

Week	Source purified water unit	Source reservoir water	Test tubing	Control tubing
3	0	1.08×10^2	5.10×10^0	2.08×10^2
6	0	6.84×10^1	2.39×10^1	2.03×10^2
9	0	1.39×10^2	3.20×10^0	1.01×10^2
12	0	1.08×10^3	7.84×10^1	1.19×10^2
18	0	7.27×10^1	6.78×10^1	5.68×10^1
24	0	1.22×10^2	3.79×10^2	1.91×10^3