SEARCH VEGSOURCE:

 

 

Follow Ups | Post Followup | Back to Discussion Board | VegSource
See spam or
inappropriate posts?
Please let us know.
  




From: Terry S. Singeltary Sr. (216-119-144-90.ipset24.wt.net)
Subject: Infectivity studies of both ash and air emissions from simulated incineration of scrapie-contaminated tissues
Date: December 13, 2004 at 10:29 am PST

-------- Original Message --------
Subject: Infectivity studies of both ash and air emissions from simulated incineration of scrapie-contaminated tissues
Date: Mon, 13 Dec 2004 11:08:42 -0600
From: "Terry S. Singeltary Sr."
Reply-To: Bovine Spongiform Encephalopathy
To: BSE-L@LISTSERV.KALIV.UNI-KARLSRUHE.DE


##################### Bovine Spongiform Encephalopathy #####################

1: Environ Sci Technol. 2004 Nov 15;38(22):6155-60.


Infectivity studies of both ash and air emissions from simulated
incineration of scrapie-contaminated tissues.

Brown P, Rau EH, Lemieux P, Johnson BK, Bacote AE, Gajdusek DC.

Laboratory of CNS Studies, National Institute of Neurological Disorders
and Stroke, and Div. of Environmental Protection, Office of Research
Facilities Development and Operations, NIH, US Dept. of HHS, Bethesda,
MD 20892, USA. paulwbrown@comcast.net

We investigated the effectiveness of 15 min exposures to 600 and 1000
degrees C in continuous flow normal and starved-air incineration-like
conditions to inactivate samples of pooled brain macerates from hamsters
infected with the 263K strain of hamster-adapted scrapie with an
infectivity titer in excess of 10(9) mean lethal doses (LD50) per g.
Bioassays of the ash, outflow tubing residues, and vented emissions from
heating 1 g of tissue samples yielded a total of two transmissions among
21 inoculated animals from the ash of a single specimen burned in normal
air at 600 degrees C. No other ash, residue, or emission from samples
heated at either 600 or 1000 degrees C, under either normal or
starved-air conditions, transmitted disease. We conclude that at
temperatures approaching 1000 degrees C under the air conditions and
combustion times used in these experiments, contaminated tissues can be
completely inactivated, with no release of infectivity into the
environment from emissions. The extent to which this result can be
realized in actual incinerators and other combustion devices will depend
on equipment design and operating conditions during the heating process.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=15575075

Infectivity Studies of Both Ash and Air Emissions from Simulated
Incineration of Scrapie- Contaminated Tissues
Brown, P.; Rau, E. H.; Lemieux, P.; Johnson, B. K.; Bacote, A. E.;
Gajdusek, D. C.;
Environ. Sci. Technol.; (Article); 2004; 38(22); 6155-6160. DOI:
10.1021/es040301z

http://pubs.acs.org/cgi-bin/sample.cgi/esthag/2004/38/i22/abs/es040301z.html

TSS

############## BSE-L-subscribe-request@kaliv.uni-karlsruhe.de ##############






Follow Ups:



Post a Followup

Name:
E-mail: (optional)
Subject:

Comments:

Optional Link URL:
Link Title:
Optional Image URL: