Homesteading Forum banner

1 - 2 of 2 Posts

·
Premium Member
Joined
·
1,401 Posts
Discussion Starter #1 (Edited)
Gleanings from Coursera class “Epidemics - the Dynamics of Infectious Diseases”

The possibility of epidemic disease has always been on my prepping radar. This class has done nothing to remove it (in fact growing antibiotic resistance makes it scarier than ever!) At least now I will understand some of the language used to describe disease outbreaks. I plan to share links & facts relevant to S&EP. Starting with Ebola.

The course lecture videos are still available on the Center for Infectious Disease Dynamics YouTube site:
https://www.youtube.com/channel/UC1dZp4v6sF2jKjutJguk7ng

Ebola:
http://www.cdc.gov/vhf/ebola/ (facts from CDC)
http://www.nytimes.com/interactive/2014/07/31/world/africa/ebola-virus-outbreak-qa.html (stories including food supply disruption in areas hit by Ebola)
http://www.phac-aspc.gc.ca/lab-bio/res/psds-ftss/ebola-eng.php (Canadian report including useful facts about sanitation in Section IV)
Section IV:
SUSCEPTIBILITY TO DISINFECTANTS: Ebolavirus is susceptible to 3% acetic acid, 1% glutaraldehyde, alcohol-based products, and dilutions (1:10-1:100 for ≥10 minutes) of 5.25% household bleach (sodium hypochlorite), and calcium hypochlorite (bleach powder).
The WHO recommendations for cleaning up spills of blood or body fluids suggest flooding the area with a 1:10 dilutions of 5.25% household bleach for 10 minutes for surfaces that can tolerate stronger bleach solutions (e.g., cement, metal)
For surfaces that may corrode or discolour, they recommend careful cleaning to remove visible stains followed by contact with a 1:100 dilution of 5.25% household bleach for more than 10 minutes.
PHYSICAL INACTIVATION: Ebola are moderately thermolabile and can be inactivated by heating for 30 minutes to 60 minutes at 60°C, boiling for 5 minutes, or gamma irradiation (1.2 x106 rads to 1.27 x106 rads) combined with 1% glutaraldehyde
Ebolavirus has also been determined to be moderately sensitive to UVC radiation
SURVIVAL OUTSIDE HOST: Filoviruses have been reported capable to survive for weeks in blood and can also survive on contaminated surfaces, particularly at low temperatures (4°C)
One study could not recover any Ebolavirus from experimentally contaminated surfaces (plastic, metal or glass) at room temperature
In another study, Ebolavirus dried onto glass, polymeric silicone rubber, or painted aluminum alloy is able to survive in the dark for several hours under ambient conditions (between 20°C and 25°C and 30–40% relative humidity) (amount of virus reduced to 37% after 15.4 hours), but is less stable than some other viral hemorrhagic fevers (Lassa)
When dried in tissue culture media onto glass and stored at 4 °C, Zaire ebolavirus survived for over 50 days.
A study on transmission of ebolavirus from fomites in an isolation ward concludes that the risk of transmission is low when recommended infection control guidelines for viral hemorrhagic fevers are followed
Infection control protocols included decontamination of floors with 0.5% bleach daily and decontamination of visibly contaminated surfaces with 0.05% bleach as necessary.
 
1 - 2 of 2 Posts
Top