UV Exposures Needed to Kill Micro-Organisms


Micro-Organism UV Dosage Required
µWs/cm2*
Bacteria  
Shigella flexneri (dysentry) 3 400
Legionella pneumophillia (legionnaires disease) 3 800
Strptococcus hemolyticus (gastroenteritis) 5 500
Staphylococcus opidermidis (toxic shock syndrome) 5 800
Leptospira iterrogans (leptospirosis) 6 000
Salmonella typhose (typhoid fever) 6 000
Salmonella paratyphi (paratyphoid fever) 6 100
Corynebacterium diptheria (diptheria) 6 500
Eschericia coli (E-coli) 7 000
Shigella sonnei (gastroenteritis) 7 000
Moraxella catarrhalis (bacterial meningitis, pneumonia) 8 500
Streptococcus lactis 8 800
Enterococcus faecales (urinary tract infection) 10 000
Mycobacterium tuberculosis (pulmonary tuberculosis) 10 000
Pseudomonus aeruginosa 10 500
Salmonella typhimurium (gastroenteritis) 15 200
Clostridium tetani (tetanus) 23 000
Cyst  
Vibrio cholera (cholera) 6 500
Bacteriophages 6 600
Cryptosporidium sp. (diarrhoeal disease) 10 000
Algae  
Chlorella vulgaris (common green algae) 22 000
Moulds  
Penicillium expansum (Blue mold) 22 000
Saprolegnia sp. zoospore (egg fungus) 35 000
Viruses  
Influenza virus 6 500
Hepatitis virus 8 000
Smallpox virus 9 000
Giardia lamblia (beaver fever) 10 000
Polio virus 21 000
Rota virus 24 000
Parasites  
Trichodina sp. (fish parasite) 35 000
Nematode eggs 92 000
Icthyophthirius sp. (white spot) 336 000

*UV dosage required to destroy 99.9% of micro-organisms