TABLE 1.
Effect of different treatments on the inactivation of B. stearothermophilus endospores from NC outer surfaces and on the recovery of E. cloacae
| Treatment | Endospores recovered (Mean log CFU/NC [SD]) (n = 5) | Log reduction | E. cloacae recovered (Mean log CFU/NC [SD]) (n = 5) |
|---|---|---|---|
| Untreated | 3.79 (0.08) | 6.04 (0.05) | |
| 70% ethanol for 30 s | 3.85 (0.14) | −0.06 | 5.99 (0.09) |
| 0.525% sodium hyplochlorite for 10 min | 0.46 (1.03)a | 3.33 | 6.05 (0.04) |
| 2% glutaraldehyde for 10 min | 1.59 (1.45)a | 2.20 | 6.13 (0.12) |
a
Four of five plates recovered 0 CFU after sodium hypochlorite treatment, as did two of five plates for the glutaraldehyde treatment. Therefore, a “1” was added to all 0 (nonexisting) data points to make the data existent and to enable a calculation of the mean and standard deviation.