TABLE 2.
Percent kill of B. atrophaeus or B. thuringiensis spores following a 10-min exposure to each of the five decontaminants testedc
| Spore type | Spore concn in quenched sample | Decontaminant concn (%) | % kill for each decontaminant |
||||
|---|---|---|---|---|---|---|---|
| VirkonS | Oxone | H2O2 | NaClO | Dichlor | |||
| B. thuringiensis | 3.6 × 102/ml | 0.01 | 47.7 | 42.7 | —a | — | — |
| 0.02 | — | — | — | 100 | 99.3 | ||
| 0.05 | — | — | 97.1 | — | — | ||
| 0.1 | 58.1 | 52.3 | — | — | — | ||
| 0.2 | — | — | — | 100 | 100 | ||
| 0.5 | — | — | 100 | — | — | ||
| 1.0 | 100 | 72.0 | — | — | — | ||
| 2.0 | — | — | — | 100 | 100 | ||
| 5.0 | — | — | 100 | — | — | ||
| B. atrophaeus | 3 × 102/ml | 0.01 | 79.4 | 77.3 | — | — | — |
| 0.02 | — | — | — | 92.9 | 99.3 | ||
| 0.05 | — | — | 100 | — | — | ||
| 0.1 | 82.3 | 83.0 | — | — | — | ||
| 0.2 | — | — | — | 100 | 100 | ||
| 0.5 | — | — | 100 | — | — | ||
| 1.0 | 100 | 98.6 | — | — | — | ||
| 2.0 | — | — | — | 100 | 100 | ||
| 5.0 | — | — | 100 | — | — | ||
| B. atrophaeus | 1 × 106/ml | 0.01 | 18.0 | 14.5 | — | — | — |
| 0.02 | — | — | — | 48.4b | 52.0 | ||
| 0.05 | — | — | 98.1 | — | — | ||
| 0.1 | 22.7 | 39.3 | — | — | — | ||
| 0.2 | — | — | — | 99.9 | 99.9 | ||
| 0.5 | — | — | 99.9 | — | — | ||
| 1.0 | 39.3 | 98.4 | — | — | — | ||
| 2.0 | — | — | — | 100 | 100 | ||
| 5.0 | 82.6 | 99.9 | 100 | — | — | ||
a
The dash means that the indicated decontaminant was not tested at this concentration.
b
The value for NaClO at 0.02% concentration is approximate because of potential experimental error.
c
Results are the means of results of duplicate tests. Recommended concentrations of three decontaminants are in boldface.