|
|
TABLE 1.
Log of spore killing under conditions specified for
sterilization and disinfectiona
|
|
| Conditions and
treatment |
Timeb |
Mean log
killing ± SE (no. of expts)
|
| Tubing |
Screws |
Bursc |
Avgd
|
|
| Sterilization |
| Water |
10
h |
0.25 ± 0.09 (8) |
0.50 ± 0.09 (8) |
|
0.38 ± 0.06 (16)
|
| Cupric ascorbate |
10
h |
2.62 ± 0.20 (6) |
3.24 ± 0.17 (8)e |
|
2.93 ± 0.14 (14)
|
| Exspor |
10
h |
3.47 ± 0.30 (4) |
3.95 ± 0.30 (4) |
|
3.71 ± 0.16 (8)
|
| Cidexplus |
10
h |
3.28 ± 0.25 (4) |
3.50 ± 0.25 (4) |
|
3.39 ± 0.27 (8)
|
| Renalin |
11
h |
4.34 ± 0.37 (4) |
5.16 ± 0.30 (6) |
|
4.75 ± 0.24 (10)
|
| Wavicide-01 |
10
h |
3.81 ± 0.34 (4) |
3.44 ± 0.34 (4) |
|
3.62 ± 0.24 (8)f
|
| Disinfection |
| Water |
30
min |
0 (5) |
0 (6) |
0 (5) |
| Cupric
ascorbate |
30
min |
2.36 ± 0.22 (5) |
3.29 ± 0.20 (6)e |
1.51 (5) |
2.83 ± 0.13 (11)
|
| Expor |
3
min |
3.36 ± 0.27 (5) |
4.15 ± 0.30 (6)e |
0.49 (5) |
3.76 ± 0.20 (11)
|
| Cidexplus |
20
min |
3.07 ± 0.22 (5) |
4.00 ± 0.21 (6)e |
2.43 (5) |
3.54 ± 0.06 (11)
|
| Cavicide |
10
min |
0.73 ± 0.29 (5) |
0.80 ± 0.27 (6) |
 0.22 (5) |
0.76 ± 0.20 (11)
|
| Clorox |
5
min |
1.95 ± 0.39 (5) |
1.66 ± 0.35 (6) |
0.40 (5) |
1.81 ± 0.26 (11)
|
| Lysol |
10
min |
0.62 ± 0.18 (5) |
0.18 ± 0.17 (6) |
0.33 (5) |
0.40 ± 0.12 (11)
|
| Wavicide-01 |
10
min |
1.63 ± 0.40 (3) |
0.63 ± 0.28 (6) |
0.11 (3) |
1.13 ± 0.24 (9)f |
|
|
a
Spore survival was calculated by adding
the numbers of spores recovered in fractions a, b, and c of the test
described in the text. Log of spore killing was calculated as the log
of the number of spores surviving treatment with water for 30 min minus
the log of the number of spores surviving after each treatment.
|
|
b
Incubation was done for the times specified
by the manufacturer's label instructions, generally consisting of a
short time (on the order of minutes) for disinfection and an extended
time (10 to 11 h) for sterilization.
|
|
c
Metal flaking and corrosion products made
spore killing on burs imprecise, and the data were omitted from further
analysis.
|
|
d
Average of spore killing by each disinfectant
in tubing and screws.
|
|
e
Significant difference (P > 0.95) between tubing and screws for the same treatment.
|
|
f
Significant difference (P > 0.05) between conditions for sterilization and disinfection for
the same disinfectant.
|