Tuesday, September 8, 2009

How long does Tuberculosis live outside of a host


How long does Tuberculosis live outside of a host?
So I just found out that the person who was in my dorm over the summer had TB...I've requested a change in chair/mattress...need I be concerned?
Other - Diseases - 2 Answers
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1 :
Tuberculosis can only be spread while it is active, such as a cough or sneeze. Mycobacterium tuberculosis can survive for weeks without the host on objects. I would change rooms if I could and get checked by a doctor.
2 :
Mycobacterium Terbuculosis can live outside the host for an extended period of time. The bacteria is called an encapsid which means that the outer part of the cell wall is like a shell and protects the contents for a long period. It can live in soil, vents bedding. The room should have been disenfected with bleach or Hilphine (which is proven to kill encapsids like TB. I think it is reasonable to have requested a new chair and mattress as it would be difficult to sanitise them. Now you can buy a mattress cover (they zip up and cover the entire mattress) if the school cannot replace them. Now the individual may have tested positive for TB but unless they were in the active phase they were not infectious. (A person can test positive even after they have been treated for TB. A positive skin test only means that they have been exposed at some time in the past. A sputum culture and chest x-ray or biopsy is the only way to tell if the infection is active



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