Remaining Gram-positive rods spore-forming bacteria (G+ rod sp) and all micro-organisms (all cfu) after one-step TT and after two-step TT disinfection (percentage remaining between brackets)
| Contact plate | Total immersion | |||
| G+ rod sp | All cfu | G+ rod sp | All cfu | |
| Before disinfection | 19 (100%) | 65 (100%) | 135 (100%) | 196 (100%) |
| After one-step TT disinfection | 3 (16%) | 11 (17%) | 28 (21%) | 29 (15%) |
| After two-step TT disinfection | 1 (5%) | 2 (3%) | 2 (1%) | 6 (3%) |