Lynny
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Registered: 3rd Jan 03
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hyperthetical question, say u had a hospital that specialised in a certain disease, e.g TB, if that hospital was closed and just left, how long would the virus stay active there? would it eventually die out or stay a threat always? also would it have to be destroyed in special way?
any help appreciated, very important
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Tiger
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Registered: 12th Jun 01
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Im not a science lion but i dont think a virus can survive for very long outside the body. I know the AIDS virus dies very shortly after leaving the body, not sure about the rest....
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BlueCorsa
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quote:
Originally posted by Tiger
Im not a science lion but i dont think a virus can survive for very long outside the body. I know the AIDS virus dies very shortly after leaving the body, not sure about the rest....
I think you mean HIV 
Most bactericides don't have significant virucidal activity. Most human pathogenic viruses can be inactivated by exposure to 60degreesC temperature for 30 minutes. Some viruses can last longer though. Viruses are most stable at low temperatures (below -40degreesC). UV light can be used to inactivate viruses (it damages the genetic material in the virus).
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BlueCorsa
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quote:
Originally posted by Lynny
hyperthetical question, say u had a hospital that specialised in a certain disease, e.g TB, if that hospital was closed and just left, how long would the virus stay active there? would it eventually die out or stay a threat always? also would it have to be destroyed in special way?
any help appreciated, very important
TB isn't caused by a virus, it's caused by the bacteria Mycobacterium tuberculosis.
Bacteria will eventually die out if they have nothing to feed on (as they are 'alive'). You could get rid of them by spraying with disinfectant. Viruses aren't living, just protein based products which have the capability to infect cells, cause harm and make copies of themselves (like a computer virus). Most bactericides don't have significant virucidal activity. Most human pathogenic viruses can be inactivated by exposure to 60degreesC temperature for 30 minutes. Some viruses can last longer though. Viruses are most stable at low temperatures (below -40degreesC). UV light can be used to inactivate viruses (it damages the genetic material in the virus).
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Tiger
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Ok - clever clogs......AIDS / HIV - all comes down to the same thing.....
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CCA
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Registered: 6th Dec 04
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TB is generally passed thru the air when someone sneezes/coughs etc and enters another persons lungs when breathed in. once settled on the lungs it begins to grow.
TB only beomes active when the immune system cannot stop it from growing an when the bacteria multiplies it causes the active TB disease.
This means that if it is air borne without being taken into the body the bacteria will die but it is not active in the air as it has nothing to attack and feed on
Hope it helps
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Lynny
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this is what i thought, so liek i said, an old TB hospital, hasnt had anyone in for 15+ years, surely the disease is not still active? or would it just be dorment?
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CCA
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If there have been TB patients there then they would have an air exchange system the same as on a plane
There shouldnt be any rsk of exposure to the virus after 15 years as appropraite precautions should have been taken to clear the air and disiinfect the building
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Lynny
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this is exactly what we thought, thank you 
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CorsAsh
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Registered: 19th Apr 02
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Napalm or thermite plasma consumes and destroys bacteria or viruses... eg VX poison.
I know this is true because I saw it in a film. The Rock, actually. 
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BlueCorsa
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quote:
Originally posted by CuteCorsaAngel
If there have been TB patients there then they would have an air exchange system the same as on a plane
There shouldnt be any rsk of exposure to the virus after 15 years as appropraite precautions should have been taken to clear the air and disiinfect the building
Some bacteria have the ability to 'hibernate' by forming spores, which can later become activated and generate bacteria when food arrives. TB isn't spore forming though.
Have a look at:
http://www.phac-aspc.gc.ca/msds-ftss/msds103e.html
TB bacteria shouldn't last anymore than a year outside of a host.
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Lynny
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thank you :d youve no idea how helpful youve been
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Lynny
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so if say an old psychiatric hospital, that had at one time been used as a TB hospital, which had been closed for 15 years, wouldnt still have the active virus?
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BlueCorsa
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quote:
Originally posted by Lynny
so if say an old psychiatric hospital, that had at one time been used as a TB hospital, which had been closed for 15 years, wouldnt still have the active virus?
I wouldn't have thought so, but it's not beyond the realms of extreme possibility. After 15 years, I should think that any pathogenic material there would be in extremely small amounts - the kind of quantities that you would find in the natural environment.
And it's not a virus, it's a bacterium!
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Lynny
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 i know 
cheers for your help 
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Welsh Dan
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Registered: 23rd Mar 00
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How did I know this was going to be about that old pschiatric hospital
I guess that that's the reason why it was closed down then?
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Lynny
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nah something completely different, long complicated story
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