DOI: 10.1128/AEM.69.1.683-685.2003
Article Figures & Data
Figures
- FIG. 1.
Summary of spore inactivation by 254-nm UV. B. subtilis biodosimetry strains WN333 (circles) and WN626 (triangles) at EPA (open symbols) or at UA (filled symbols). For comparison, the UV inactivation kinetics from Table 1 are plotted for spores of E. intestinalis (solid squares), E. cuniculi (hatched squares), and E. hellem (open squares). The data points shown for WN333 at UA are averages of three separate determinations, which varied by ±5%.
Tables
- TABLE 1.
UV inactivation kinetics of E. intestinalis, E. hellem, and E. cuniculi sporesa
Spores Site UV fluence (J/m2) No. of infected/ no. inoculated (P) Response logit Live spores (D) Log applied dose (Do) Log change (D/Do) Temp (°C) E. intestinalis UA 50 141/5 (0.93) 2.639057 75 3.2 −1.3 25 UA 60 1/10 (0.10) −2.197225 1 3.2 −3.2 25 EPA 60 2/15 (0.13) −1.8718 1 3.2 −3.2 25 UA 80 3/15 (0.20) −1.386294 1 3.2 −3.2 25 UA 90 0/10 (0) 3.2 −3.2 25 EPA 90 0/10 (0) 3.2 −3.2 25 UA 120 0/5 (0) 3.2 −3.2 25 UA 140 0/5 (0) 3.2 −3.2 25 UA 140 0/5 (0) 3.2 −3.2 5 E. hellem UA 120 8/10 (0.80) 1.386294 55 3.2 −1.5 25 UA 140 5/10 (0.50) 0 16 3.2 −2.0 25 UA 170 2/10 (0.20) −1.386294 4 3.2 −2.6 25 UA 190 0/10 (0) 3.2 −3.2 25 E. cuniculi UA 80 6/10 (0.60) 0.405465 29 3.2 −1.8 25 UA 100 4/10 (0.40) −0.405465 8 3.2 −2.3 25 UA 130 2/10 (0.20) −1.386294 2 3.2 −3.0 25 UA 140 0/5 (0) 3.2 −3.2 25 ↵ a Calculations performed according to Korich et al. (8). See the text for details.
