Bacillus subtilis
Hijnen et al. 2006 · 254 nm
Test conditions & context
Type Bacterial spore
Medium Water
Test wavelength 254 nm
Author Hijnen et al.
Year 2006
Wässrige Suspension, LP-Quecksilberlampe
UV-C dose–response (D-values)
A D-value is the UV-C dose (in mJ/cm²) needed for a given log-reduction. D90 = 90 % inactivation = 1-log; D99 = 99 % = 2-log; D99.9 = 99.9 % = 3-log, and so on. Values come from the cited study under its specific test conditions.
Reduction log Dose (mJ/cm²)
D90 90 % 1-log 10.1 mJ/cm²
D99 99 % 2-log 20.2 mJ/cm²
D99.9 99.9 % 3-log 30.3 mJ/cm²
D99.99 99.99 % 4-log 40.4 mJ/cm²
D99.999 99.999 % 5-log 50.5 mJ/cm²
D99.9999 99.9999 % 6-log 60.6 mJ/cm²
Morphology & UV-C resistance
Morphology class Bacterial endospore
Bakterium in Endospore-Form: Mehrschicht-Coat + DPA-Calcium-Komplex + dehydratisiertes Genom. ~100× resistenter als aktive Zelle.
Primary source
Hijnen et al. (2006). pubmed.ncbi.nlm.nih.gov/28888104/