RE: More on Re: using 100% as decontaminate in cryostat

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From:Pam Marcum <>
To:Tim Morken <>,
Content-Type:text/plain; charset="iso-8859-1"

I found a liquid deconatmient that sprays on, allowing me to keep my hands
off surfaces while the initial cleaning is taking place.  The spray is sold
by Fisher and is CiDecon Aerosol Disinfectant.  It is used in clean rooms
and for general surface decontamination of a wide range of viruses and fungi
including TB and Hiv-1.  It is EPA rated and conforms to OSHA Bloodborne
Pathogen Standards.  Pam Marcum

-----Original Message-----
From: Tim Morken []
Sent: Monday, March 06, 2000 8:33 AM
Subject: More on Re: using 100% as decontaminant in cryostat


The literature shows that 70% is a better disinfectant than 100% alcohol.
People use 100% alcohol to get rid of the water in the cryostat after

There is plenty of litererature on how best to clean surfaces (benchtops,
walls, floors, glassware) and how to clean freezers and refrigerators, so
the methods are there. What is not clear is how that works with a cryostat
where shavings may sit for awhile (days, weeks?) before being cleaned up.
How do you best clean a piece of machinery that is exposed to, and often
caked with, contaminated tissue? How common is it for the cryostat to have
living pathogenic organisms it it at any given time?

Tim Morken, B.A., EMT(MSA), HTL(ASCP)
Infectious Disease Pathology
Centers for Disease Control
1600 Clifton Rd.
Atlanta, GA 30333


Phone: (404) 639-3964
FAX:  (404)639-3043

----Original Message Follows----
Subject: Re: using 100% as decontaminant in cryostat
Date: Sun, 05 Mar 2000 19:27:33 -0500 (EST)

It is my understanding that absolute is not a good disenfectant, because a
certain water content kills bacteria, my main concern are and is the viral
contaminents,AFB, HIV, especially with the multi-drug resistant species
cropping up.  Bleach or 10%
sodium hypochlorite is used on work benches in the clinical labs where blood
borne pathogens are concerned, shouldn't we be looking at what they are
as an adjunct to us? Are we not at the same risk? We may not have to
re-invent the wheel here just look across our halls.                  Dana

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