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Crude TST Conversion Rate for Animals under Control and Ultraviolet Intervention Conditions by Month of Exposure for the Two Sequential Experiments (Combined in the Analysis)
| TST (>6 mm) | Experiment 1 |
Experiment 2 |
||
|---|---|---|---|---|
| Intervention | Control | Intervention | Control | |
| Month 1 | 0 | 1 | 4 | 17 |
| Month 2 | 0 | 3 | 12 | 31 |
| Month 3 | 0 | 5 | 0 | 1 |
| Month 4 | 0 | 0 | — | — |
| Total | 0 | 9 | 16 | 49 |
Definition of abbreviation: TST = tuberculin skin test.
