TABLE 1.
Number of colony forming units/per milliliter (CFU/mL) and Most Probable Number/milliliter (MPN/mL) obtained from handpiece lines, air/water syringes and source water for each dental unit.
| Dental Unit | Sample Source | CFU/mL (R2A) | MPN/mL(SimPlate™) |
|---|---|---|---|
| 1 | Handpiece | 10,967 | 19.5 |
| Air/Water | 275,333 | *74.0 | |
| SourceWater | 11,500 | 47.0 | |
| 2 | Handpiece | 17,733 | 62.3 |
| Air/Water | 11,033 | 50.7 | |
| SourceWater | 2,800 | 27.6 | |
| 3 | Handpiece | 48,333 | 20.9 |
| Air/Water | 146,333 | 47.0 | |
| SourceWater | 7,867 | 44.0 | |
| 4 | Handpiece | 35,000 | 44.0 |
| Air/Water | 682,667 | 32.4 | |
| SourceWater | 13,967 | *74.0 | |
| 5 | Handpiece | 94,000 | 31.1 |
| Air/Water | 424,667 | 37.2 | |
| SourceWater | 513 | 0.2 | |
| 6 | Handpiece | 372,000 | *74.0 |
| Air/Water | 419,333 | 44.0 | |
| SourceWater | 2,240 | 39.2 | |
| 7 | Handpiece | 126,000 | 50.7 |
| Air/Water | 124,000 | 47.0 | |
| SourceWater | 8,400 | *74.0 | |
| 8 | Handpiece | 110,667 | 62.3 |
| Air/Water | 94,000 | 50.7 | |
| SourceWater | 32,333 | *74.0 | |
| 9 | Handpiece | 22,500 | *74.0 |
| Air/Water | 130,667 | 44.0 | |
| SourceWater | 42,000 | 35.5 | |
| 10 | Handpiece | 162,000 | *74.0 |
| Air/Water | 107,667 | *74.0 | |
| SourceWater | 70 | 0.4 | |
| 11 | Handpiece | 117,000 | 44.0 |
| Air/Water | 30,333 | 29.9 | |
| SourceWater | 51,667 | 22.3 | |
| 12 | Handpiece | 703,333 | 27.6 |
| Air/Water | 633,333 | 22.3 | |
| SourceWater | 107 | 3.5 | |
| 13 | Handpiece | 165,000 | 32.4 |
| Air/Water | 121,333 | 50.7 | |
| SourceWater | 50,333 | 26.6 | |
| 14 | Handpiece | 213,333 | 62.3 |
| Air/Water | 134,333 | 28.7 | |
| SourceWater | 13,767 | 47.0 | |
| 15 | Handpiece | 822,000 | 62.3 |
| Air/Water | 182,333 | 37.2 | |
| SourceWater | 1,783 | 25.7 |
*
MPN of >73.8/mL