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UV Irradiation Dosage Table

The following are incident energies of germicidal ultraviolet radiation at 253.7 nanometers wavelength necessary to inhibit colony formation in microorganisms (90%) and for 2-log reduction (99%):

VIOTECHE –Lights  lamp produces 4,400 µW/cm² @ 2'

UV dose = UV intensity x time in seconds.To compute time needed to inactivate germs in the following chart at 2' distance divide the UV dose by 4,400.

 

Example:

for 99% kill factor of Infectious Hepatitis: 8,000 divided by 4,400 = 1.8 seconds.

 

Organisms:

Energy Dosage of Ultraviolet radiation (UV dose) in µWs/cm2 needed for kill factor

Bacteria

90%
(1 log reduction)

99%
(2 log reduction)

Bacillus anthracis - Anthrax

4,520

8,700

Bacillus anthracis spores - Anthrax spores

24,320

46,200

Bacillus magaterium sp. (spores)

2,730

5,200

Bacillus magaterium sp. (veg.)

1,300

2,500

Bacillus paratyphusus

3,200

6,100

65445Bacillus subtilis spores

11,600

22,000

Bacillus subtilis

5,800

11,000

Clostridium tetani

13,000

22,000

Corynebacterium diphtheriae

3,370

6,510

Ebertelia typhosa

2,140

4,100

Escherichia coli

3,000

6,600

Leptospiracanicola - infectious Jaundice

3,150

6,000

Microccocus candidus

6,050

12,300

Microccocus sphaeroides

1,000

15,400

Mycobacterium tuberculosis

6,200

10,000

Neisseria catarrhalis

4,400

8,500

Phytomonas tumefaciens

4,400

8,000

Proteus vulgaris

3,000

6,600

Pseudomonas aeruginosa

5,500

10,500

Pseudomonas fluorescens

3,500

6,600

Salmonella enteritidis

4,000

7,600

Salmonela paratyphi - Enteric fever

3,200

6,100

Salmonella typhosa - Typhoid fever

2,150

4,100

Salmonella typhimurium

8,000

15,200

Organisms:

Energy Dosage of Ultraviolet radiation (UV dose) in µWs/cm2 needed for kill factor

Bacteria

90%
(1 log reduction)

99%
(2 log reduction)

Sarcina lutea

19,700

26,400

Serratia marcescens

2,420

6,160

Shigella dyseteriae - Dysentery

2,200

4,200

Shigella flexneri - Dysentery

1,700

3,400

Shigella paradysenteriae

1,680

3,400

Spirillum rubrum

4,400

6,160

Staphylococcus albus

1,840

5,720

Staphylococcus aureus

2,600

6,600

Staphylococcus hemolyticus

2,160

5,500

Staphylococcus lactis

6,150

8,800

Streptococcus viridans

2,000

3,800

Vibrio comma - Cholera

3,375

6,500

Molds

90%

99%

Aspergillius flavus

60,000

99,000

Aspergillius glaucus

44,000

88,000

Aspergillius niger

132,000

330,000

Mucor racemosus A

17,000

35,200

Mucor racemosus B

17,000

35,200

Oospora lactis

5,000

11,000

Penicillium expansum

13,000

22,000

Penicillium roqueforti

13,000

26,400

Penicillium digitatum

44,000

88,000

Rhisopus nigricans

111,000

220,000

Protozoa

90%

99%

Chlorella Vulgaris

13,000

22,000

Nematode Eggs

45,000

92,000

Paramecium

11,000

20,000

Virus

90%

99%

Bacteriopfage - E. Coli

2,600

6,600

Infectious Hepatitis

5,800

8,000

Influenza

3,400

6,600

Poliovirus - Poliomyelitis

3,150

6,600

Tobacco mosaic

240,000

440,000

Yeast

90%

99%

Brewers yeast

3,300

6,600

Organisms:

Energy Dosage of Ultraviolet radiation (UV dose) in µWs/cm2 needed for kill factor

Bacteria

90%
(1 log reduction)

99%
(2 log reduction)

Common yeast cake

6,000

13,200

Saccharomyces carevisiae

6,000

13,200

Saccharomyces ellipsoideus

6,000

13,200

Saccharomyces spores

8,000

17,600

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Part 2 :  Overview on important viruses infecting humans and predicted UVC sensitivity

 

Organisms:

Energy Dosage of Ultraviolet radiation (UV dose) in µWs/cm2 needed for kill factor

Virus

90%
(1 log reduction)

 

Human adenovirus A to F

27,000-49,000

 

Lassa virus

3,500

 

Astrovirus

10,000-12,000

 

California encephalitis

virus

Hantaan virus

2,000-3,500

 

Norwalk virus (NoV)

9,700-11,000

 

Sapporo virus

9,700-11,000

 

Hepatitis E virus

9,700-11,000

 

SARS coronavirus

700-1,100

 

Hepatitis D virus (assoc.

to HBV)

22,000

 

viruses causing

haemorrhagic fevers:

Marburg-, Ebola virus

2,000

 

Hepatitis C virus

6,800-8,400

 

Yellow fever virus

6,800-8,400

 

Tick-borne encephalitis

virus

6,800-8,400

 

Hepatitis B virus (HBV)

3,800-4,100

 

Herpes simplex virus 1, 2

3,500-7,000

 

Varicella zoster virus

3,500-7,000

 

Cytomegalovirus

3,500-7,000

 

Epstein Barr virus

3,500-7,000

 

Human herpes virus 6, 7

3,500-7,000

 

Human herpes virus 8

3,500-7,000

 

Influenza virus A-C

3,500-7,000

 

Polyomavirus

68,000-103,000

 

Papillomavirus (warts)

68,000-103,000

 

Measles virus

3,000

 

Mumps virus

3,000

 

Parainfluenza virus

3,000

 

 

Organisms:

Energy Dosage of Ultraviolet radiation (UV dose) in µWs/cm2 needed for kill factor

Virus

90%
(1 log reduction)

 

Poliovirus

12,000-14,000

 

Coxsackievirus

12,000-14,000

 

Echovirus

12,000-14,000

 

Rhinovirus

12,000-14,000

 

Smallpox virus,

molluscum contagiosum

1,800-4,300

 

Reovirus

Human rotavirus A, B

19,000-32,000

 

Human

immunodeficiency virus

(HIV) types 1 and 2

18,000-30,000

 

Human T-lymphotropic

viruses (HTLV-1, -2)

18,000-30,000

 

Rabies virus

900-1,200

 

Rubella virus

4,900-6,500

 

Human respiratory

syncytial virus

3,000

 

 

Parvovirus B19

2,100-3,200

 

Hepatitis A virus (HAV)

12,000-14,000

 

 

 

The list of viruses was compiled according to a corresponding list published by the Robert Koch Institute in cooperation with the German Association for the Control of Virus Diseases and the German Society for Hygiene and Microbiology (RKI, DVV, DGHM 2004), according to the U.S. Departments of Health and Human Services (CDC 2004) and Büchen-Osmond 2003a, b). The predicted values for UVC sensitivity were adopted from Lytle & Sagripanti (2005).

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