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Some Micro-Organisms Deactivated By Ultraviolet Germicidal Light

Incident Energies at 253.7 Nanometers (2537 Angstroms) necessary to inhibit colony formation in greater than 99.9% of Micro-Organisms  (measured in microwatt seconds per square centimeter)

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Bacteria

UV Dose

Bacteria

UV Dose

Agrobacterium lumefaciens 5 8,500

Pseudomonas aeruginosa
(Environ.Strain) 1,2,3,4,5,9

10,500
Bacillus anthracis 1,4,5,7,9  (anthrax veg.) 8,700
Bacillus anthracis Spores (anthrax spores)*

*There are conflicting values reported for inactivation of the anthrax spore ranging between 9,400 - 135,000 microwatt-seconds per square centimeter (for 99% inactivation). There are some studies underway to resolve this conflict and we hope to have a reliable value to report within the next several months.
46,200 Pseudomonas aeruginosa 
(Lab. Strain) 5,7
3,900
Pseudomonas fluorescens 4,9 6,600
Bacillus megatherium Sp. (veg) 4,5,9 2,500 Rhodospirillum rubrum 5 6,200
Bacillus megatherium Sp. (spores) 4,9 5,200 Salmonella enteritidis 3,4,5,9 7,600
Bacillus paratyphosus 4,9 6,100 Salmonella paratyphi (Enteric Fever) 5,7 6,100
Bacillus subtilis 3,4,5,6,9 11,000 Salmonella Species 4,7,9 10,000
Bacillus subtilis Spores 2,3,4,6,9 22,000 Salmonella typhimurium 4,5,9 15,200
Clostridium tetani 23,100 Salmonella typhi (Typhoid Fever) 7 7,000
Clostridium botulinum 11,200 Salmonella 10,500
Corynebacterium diphtheriae 1,4,5,7,8,9 6,500 Sarcina lutea 1,4,5,6,9 26,400
Dysentery bacilli 3,4,7,9 4,200 Serratia marcescens 1,4,6,9 6,160
Eberthella typhosa 1,4,9 4,100 Shigella dysenteriae - Dysentery 1,5,7,9 4,200
Escherichia coli 1,2,3,4,9 6,600 Shigella flexneri - Dysentery 5,7 3,400
Legionella bozemanii 5 3,500 Shigella paradysenteriae 4,9 3,400
Legionella dumoffill 5 5,500 Shigella sonnei 5 7,000
Legionella gormanil 5 4,900 Spirillum rubrum 1,4,6,9 6,160
Legionella micdadei 5 3,100 Staphylococcus albus 1,6,9 5,720
Legionella longbeachae 5 2,900 Staphylococcus aureus 3,4,6,9 6,600

Legionella pneumophila (Legionnaire's Disease)

12,300 Staphylococcus epidermidis 5,7 5,800
Leptospiracanicola-Infectious Jaundice 1,9 6,000 Streptococcus faecaila 5,7,8 10,000
Leptospira interrogans 1,5,9 6,000 Streptococcus hemolyticus 1,3,4,5,6,9 5,500
Micrococcus candidus 4,9 12,300 Streptococcus lactis 1,3,4,5,6 8,800
Micrococcus sphaeroides 1,4,6,9 15,400 Streptococcus pyrogenes 4,200
Mycobacterium tuberculosis 1,3,4,5,7,8,9 10,000 Streptococcus salivarius 4,200
Neisseria catarrhalis 1,4,5,9 8,500 Streptococcus viridans 3,4,5,9 3,800
Phytomonas tumefaciens 1,4,9 8,500 Vibrio comma (Cholera) 3,7 6,500
Proteus vulgaris 1,4,5,9 6,600 Vibrio cholerae 1,5,8,9 6,500
Molds

UV Dose

Molds

UV Dose

Aspergillus amstelodami 77,000 Oospora lactis 1,3,4,6,9 11,000
Aspergillus flavus 1,4,5,6,9 99,000 Penicillium chrysogenum 56,000
Aspergillus glaucus 4,5,6,9 88,000 Penicillium digitatum 4,5,6,9 88,000
Aspergillus niger (breed mold) 2,3,4,5,6,9 330,000 Penicillium expansum 1,4,5,6,9 22,000
Mucor mucedo 77,000 Penicillium roqueforti 1,2,3,4,5,6 26,400
Mucor racemosus (A & B) 1,3,4,6,9 35,200 Rhizopus nigricans (cheese mold) 3,4,5,6,9 220,000
 Protozoa

UV Dose

Protozoa

UV Dose

Chlorella vulgaris (algae) 1,2,3,4,5,9 22,000 Giardia lamblia (cysts) 3 100,000
Blue-green Algae 420,000 Nematode Eggs 6 40,000
E. hystolytica 84,000 Paramecium 1,2,3,4,5,6,9 200,000
 Virus

UV Dose

Virus

UV Dose

Adeno Virus Type III 3 4,500 Influenza 1,2,3,4,5,7,9 6,600
Bacteriophage 1,3,4,5,6,9 6,600 Rotavirus 5 24,000
Coxsackie 6,300 Tobacco Mosaic 2,4,5,6,9 440,000
Infectious Hepatitis 1,5,7,9 8,000    
Yeasts

UV Dose

Yeasts

UV Dose

Baker's Yeast 1,3,4,5,6,7,9 8,800 Saccharomyces cerevisiae 4,6,9 13,200
Brewer's Yeast 1,2,3,4,5,6,9 6,600 Saccharomyces ellipsoideus 4,5,6,9 13,200
Common Yeast Cake 1,4,5,6,9 13,200 Saccharomyces sp. 2,3,4,5,6,9 17,600
1. "The Use of Ultraviolet Light for Microbial Control", Ultrapure Water, April 1989.
2. William V. Collentro, "Treatment of Water with Ultraviolet Light - Part I", Ultrapure Water, July/August 1986.
3. James E. Cruver, Ph.D., "Spotlight on Ultraviolet Disinfection", Water Technology, June 1984.
4. Dr. Robert W. Legan, "Alternative Disinfection Methods - A Comparison of UV and Ozone", Industrial Water Engineering, March/April 1982. 
5. Unknown 
6. Rudolph Nagy, Research Report BL-R-6-1059-3023-1, Westinghouse Electric Corporation.
7. Myron Lupal, "UV Offers Reliable Disinfection", Water Conditioning & Purification, November 1993.
8. John Treij, “Ultraviolet Technology”, Water Conditioning & Purification, December 1995.9. Bak Srikanth, “The Basic Benefits of Ultraviolet Technology”, Water Conditioning & Purification, December 1995.

 

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