Table 1.
Bacterial contamination of water samples from air/water syringes and dental handpieces [colony-forming units (CFUs)/mL]
| Year | Air/water syringes |
Dental handpieces |
Total |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | Range | Median (P25–P75) | ≤500 n (%) | ≤100 n (%) | n | Range | Median (P25–P75) | ≤500 n (%) | ≤100 n (%) | n | Range | Median (P25–P75) | ≤500 n (%) | ≤100 n (%) | |
| 2012 | 24 | 2–30,000 | 970 (71.5–2,562.5) | 11 (45.83) | 10 (41.67) | 0 | 24 | 2–30,000 | 970 (71.5–2,562.5) | 11 (45.83) | 10 (41.67) | ||||
| 2013 | 99 | 0–267,120 | 158 (33–1,360) | 53 (53.54) | 52 (52.53) | 99 | 1–718,680 | 406 (100–11,200) | 46 (46.46) | 43 (43.43) | 198 | 0–718,680 | 249.5 (55.25–3,000) | 99 (50) | 95 (47.98) |
| 2014 | 58 | 0–1,700,000 | 125 (8.5–2,775) | 38 (65.52) | 31 (53.45) | 58 | 0–1,800,000 | 390 (35.5–9,375) | 36 (62.07) | 32 (55.17) | 116 | 0–1,800,000 | 235 (14.25–5,975) | 74 (63.79) | 63 (54.31) |
| 2015 | 42 | 0–620,000 | 350 (73.5–1,375) | 28 (66.67) | 27 (64.29) | 41 | 0–550,000 | 430 (140–2,500) | 23 (56.10) | 20 (48.78) | 83 | 0–620,000 | 400 (98–1,600) | 51 (61.45) | 47 (56.63) |
| 2016 | 50 | 0–66,000 | 180 (4–1,975) | 26 (52.00) | 24 (48.00) | 50 | 0–64,000 | 370 (20.75–3,650) | 27 (54.00) | 19 (38.00) | 100 | 0–66,000 | 290 (14.25–2,200) | 53 (53) | 43 (43.00) |
| 2017 | 45 | 0–32,000 | 120 (26–1,600) | 30 (66.67) | 21 (46.67) | 45 | 0–64,000 | 450 (91.5–2,950) | 25 (55.56) | 12 (26.67) | 90 | 0–64,000 | 230 (35–1,925) | 55 (61.11) | 33 (36.67) |
| Total | 318 | 0–1,700,000 | 190 (27.75–1,825) | 186 (58.49) | 165 (51.89) | 293 | 0–1,800,000 | 410 (66.5–4,100) | 157 (53.58) | 126 (43.00) | 611 | 0–1,800,000 | 280 (35–2,450) | 343 (56.14) | 291 (47.63) |