Are dead bacteria and viruses killed by UV light in purified water poisonous?

Bacteria that are killed by UV light -- especially Gram (-) bacteria -- can still have reactive protiens that will be present in water.





Any bacteria that has a LPS (lipo-polysaccaride layer) can produce endotoxins, which are classifed as pyrogens (fever producing agents).





Additionally, fungal cells that are killed utilizing UV light can leave behind protiens called glucans -- another type of pyrogen.





Ultimately, the bacteria will be killed (i.e.: considered to be non-viable and unable to reproduce), but the basic building blocks of the cell will still be present and able to cause harm.

Are dead bacteria and viruses killed by UV light in purified water poisonous?
no
Reply:No. Algae is poisonous though.





Dead bacteria cannot poison you. They're too small and too dead to cause any harm.
Reply:Bacteria and virus are not poisonous nor dangerous once killed. UV light has been shown to to an effective method of killing bacteria and certain virus.








Avian flu virus unlikely to spread through wastewater and drinking water treatment systems, Cornell researchers find


http://www.news.cornell.edu/stories/Jan0...
Reply:viruses translate certain toxic substances into the host body which are lethal to us.


certain bacteria like the gram positive bacteria produce tranlated protein which are toxic


gram negative bacteria have toxic substances in their outer plasma membrane which are toxic to us


so if dead viruses are there they are harmless similar is the case with gram positives


if gram negatives are present they are toxic but as they cant replicate the amount of toxin is not that much to harm us