Naked Science Forum

Life Sciences => Cells, Microbes & Viruses => Topic started by: Jackson on 13/11/2009 22:30:02

Title: How long does it take for pathogens to die?
Post by: Jackson on 13/11/2009 22:30:02

Jackson Moeng  asked the Naked Scientists:
   
Dear Chris
 
Do pathogens die off in products with low water activity? How long does it take for pathogens to die?
 
Regards

What do you think?

Title: How long does it take for pathogens to die?
Post by: RD on 13/11/2009 22:39:39

Some are remarkably persistent ...

Quote

Anthrax is an acute disease caused by Bacillus anthracis. It affects both humans and animals. Most forms of the disease are highly lethal. There are effective vaccines against anthrax, and some forms of the disease respond well to antibiotic treatment.

Like many other members of the genus Bacillus, Bacillus anthracis can form dormant spores that are able to survive in harsh conditions for extremely long periods of time—even decades or centuries. Such spores can be found on all continents, even Antarctica. When spores are inhaled, ingested, or come into contact with a skin lesion on a host they may reactivate and multiply rapidly.

http://en.wikipedia.org/wiki/Anthrax

Title: How long does it take for pathogens to die?
Post by: Jonathan Madriaga on 25/11/2009 22:25:35

Pathogens are very interesting. Some are sensitive to certain temperatures, pH levels, and concentration. But others are adaptable. They can adapt their mechanisms to cope with extreme conditions. Viruses can work that way.