E. coli
Coohill & Sagripanti 2008 · 254 nm
Test conditions & context
Type Bacterium (vegetative)
Medium Water
Test wavelength 254 nm
Author Coohill & Sagripanti
Year 2008
Phosphatpuffer, kollimierter Strahl
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 1.4 mJ/cm²
D99 99 % 2-log 2.8 mJ/cm²
D99.9 99.9 % 3-log 4.2 mJ/cm²
D99.99 99.99 % 4-log 5.6 mJ/cm²
D99.999 99.999 % 5-log 7 mJ/cm²
D99.9999 99.9999 % 6-log 8.4 mJ/cm²
Primary source
Coohill & Sagripanti (2008). pubmed.ncbi.nlm.nih.gov/7871151/