Bill said:Thanks Ron.
It seemed there were a couple of other outfits that were at the cutting edge of developing live tests over the past 3 years but it has gotten awful quiet so I ws curious as to where your's was at.
Merry Christmas and all the best in '08 to you as well.
bse-tester said:Further to your question Bill regarding those other tests that have apparently fallen between the cracks. Some are still ongoing and the majority, if not all of them were involved in the detection of PrPsc in blood.
Even though we initially looked at developing a "live test" by using blood as the sample from the host, we very quickly changed our minds due to the extremely comlex matrix that blood is. Blood is absolutely full of many many proteins and other agents that will, without any doubt whatsoever, create false positives virtually with every test. So it becomes a consumate waste of time to try to identfy the necessary agent (PrPsc) within a matrix that is actually doing its best to fool you each and every time.
This is why so many companies have attempted it, announced their initial findings, then faded away as they soon realized that blood is a very complex liquid to use.
We found that urine is by far, the best agent to use in that it is already representative of what was in the blood, has been filtered naturally by the kidney's and is easily accessable without too much invasive techniques which the animal or the human will have to be subjected to. Urine is also easier to use in the lab inthat it can be concentrated faster without having to go through a lengthy and costly seperation process whereby the blood is broken down through many procedures to illiminate all of the other "stuff" that is not part of the final process.
We do know that our protocol will work, as it has in the early stages in the lab in Cleveland. What we need to do now is tweek it and with our totally extra-special little antibody that we use to bind to the PrPsc, we then can identify the presence of that little bad guy in urine within 24 hours or less.
Essentially, if you can imagine that you are going to ship your animals to the slaughterhouse say Friday, then you can arrange to have the local vet come to your farm on Tuesday prior and take the samples from each animal that is going to the plant. By isolating those animals and then receiving the complete and total all clear from the lab, you can now ship animals that are 100% clear of BSE. Now that makes your product somewhat a little more desirable than others in that it has now been scientifically tested and deemed to be free of BSE. I am sure you can see the potential for the enhancement of not only your "Risk Managment" but als oyour market and also the price you can expect to receive for those animals may well increase as well. Within a few yews, BSE will become a thing of the past in the sense that any animla found to have the disease will never be shipped to the slaughterhouse at all. Taking that animal out of the loop will make beef producers free to sell their product at the kind of prices they once enjoyed in my opinion and without having to worry whether or not one of their animals will be rejected.
Of course, that animal, once it enters the kill floor is subjected to another test which will act as a confirmatory test to be kept on file, along with the tissues which will be kept in a minus 80C freezer for the expected life of the product from kill to consumption.
Merry Christmas and a very Happy New Year folks.
Ron.
bse-tester said:Further to your question Bill regarding those other tests that have apparently fallen between the cracks. Some are still ongoing and the majority, if not all of them were involved in the detection of PrPsc in blood.
Even though we initially looked at developing a "live test" by using blood as the sample from the host, we very quickly changed our minds due to the extremely comlex matrix that blood is. Blood is absolutely full of many many proteins and other agents that will, without any doubt whatsoever, create false positives virtually with every test. So it becomes a consumate waste of time to try to identfy the necessary agent (PrPsc) within a matrix that is actually doing its best to fool you each and every time.
This is why so many companies have attempted it, announced their initial findings, then faded away as they soon realized that blood is a very complex liquid to use.
We found that urine is by far, the best agent to use in that it is already representative of what was in the blood, has been filtered naturally by the kidney's and is easily accessable without too much invasive techniques which the animal or the human will have to be subjected to. Urine is also easier to use in the lab inthat it can be concentrated faster without having to go through a lengthy and costly seperation process whereby the blood is broken down through many procedures to illiminate all of the other "stuff" that is not part of the final process.
We do know that our protocol will work, as it has in the early stages in the lab in Cleveland. What we need to do now is tweek it and with our totally extra-special little antibody that we use to bind to the PrPsc, we then can identify the presence of that little bad guy in urine within 24 hours or less.
Essentially, if you can imagine that you are going to ship your animals to the slaughterhouse say Friday, then you can arrange to have the local vet come to your farm on Tuesday prior and take the samples from each animal that is going to the plant. By isolating those animals and then receiving the complete and total all clear from the lab, you can now ship animals that are 100% clear of BSE. Now that makes your product somewhat a little more desirable than others in that it has now been scientifically tested and deemed to be free of BSE. I am sure you can see the potential for the enhancement of not only your "Risk Managment" but als oyour market and also the price you can expect to receive for those animals may well increase as well. Within a few yews, BSE will become a thing of the past in the sense that any animla found to have the disease will never be shipped to the slaughterhouse at all. Taking that animal out of the loop will make beef producers free to sell their product at the kind of prices they once enjoyed in my opinion and without having to worry whether or not one of their animals will be rejected.
Of course, that animal, once it enters the kill floor is subjected to another test which will act as a confirmatory test to be kept on file, along with the tissues which will be kept in a minus 80C freezer for the expected life of the product from kill to consumption.
Merry Christmas and a very Happy New Year folks.
Ron.
Subjected to ANOTHER test???? Who pays for that one Ron??? Then why even bother with your's ????
You really should try selling used cars,life insurance or home barber kits.
flounder said:Bill said:Thanks Ron.
It seemed there were a couple of other outfits that were at the cutting edge of developing live tests over the past 3 years but it has gotten awful quiet so I ws curious as to where your's was at.
Merry Christmas and all the best in '08 to you as well.
hi bill,
here is some other data on the topic you might be interested in ;
Prion detection by an amyloid seeding assay
David W. Colby*, Qiang Zhang*,, Shuyi Wang*, Darlene Groth*, Giuseppe
Legname*,, Detlev Riesner, and Stanley B. Prusiner*,¶,||
*Institute for Neurodegenerative Diseases and ¶Departments of Neurology and
Biochemistry and Biophysics, University of California, San Francisco, CA
94143; and Institut für Physikalische Biologie, Heinrich-Heine Universität,
40225 Düsseldorf, Germany
Contributed by Stanley B. Prusiner, October 25, 2007 (sent for review
September 18, 2007)
Abstract
Polymerization of recombinant prion protein (recPrP), which was produced in
bacteria, into amyloid fibers was accompanied by the acquisition of prion
infectivity. We report here that partially purified preparations of prions
seed the polymerization of recPrP into amyloid as detected by a fluorescence
shift in the dye Thioflavin T. Our amyloid seeding assay (ASA) detected
PrPSc, the sole component of the prion, in brain samples from humans with
sporadic Creutzfeldt–Jakob disease, as well as in rodents with experimental
prion disease. The ASA detected a variety of prion strains passaged in both
mice and hamsters. The sensitivity of the ASA varied with strain type; for
hamster Sc237 prions, the limit of detection was 1 fg. Some prion strains
consist largely of protease-sensitive PrPSc (sPrPSc), and these strains were
readily detected by ASA. Our studies show that the ASA provides an
alternative methodology for detecting both sPrPSc and protease-resistant
PrPSc that does not rely on protease digestion or immunodetection.
prion protein | PrPSc | Thioflavin T | protease-sensitive | femtogram
----------------------------------------------------------------------------
----
Footnotes
Author contributions: D.W.C., Q.Z., G.L., D.R., and S.B.P. designed
research; D.W.C., Q.Z., S.W., and D.G. performed research; D.W.C. and S.B.P.
analyzed data; and D.W.C. and S.B.P. wrote the paper.
Present address: Buck Institute for Age Research, Novato, CA 94945.
Present address: Neurobiology Sector, Scuola Internazionale Superiore di
Studi Avanzati, Trieste 34012, Italy.
Conflict of interest statement: D.G., G.L., D.R., and S.B.P. have financial
interest in InPro Biotechnology, Inc.
||To whom correspondence should be addressed. E-mail: [email protected]
http://www.pnas.org/cgi/content/abstract/0710152105v1?etoc
ALSO, see potential TSE rapid test data in the pipeline here ;
http://www.prion2007.com/pdf/Prion%20Book%20of%20Abstracts.pdf
EFSA Scientific Report on the evaluation of rapid ante mortem BSE test1
Question number: EFSA-Q-2003-084
Adopted date: 27/11/2006
Summary
The European Food Safety Authority (EFSA) and its Scientific Expert Working Group on Transmissible Spongiform Encephalopathy (TSE) Testing were asked by the European Commission (EC) to take over the mandate of the former Scientific Steering Committee (SSC) for the scientific evaluation of rapid TSE/BSE (Bovine Spongiform Encephalopathy) tests. At present 12 rapid BSE test kits are approved by the EC for the post mortem testing of slaughtered cattle in accordance with the TSE Regulation (EC) No 999/2001. Following an EC call for expression of interest in the Official Journal of the European Union (No C15) on 22 January 2003, several parties indicated their interest in participating in the third European evaluation exercise for newly developed rapid post mortem and live animal TSE/BSE tests.
Expressions of interest were invited from those who had tests in advanced stages of development or available for use for the diagnosis of BSE in live cattle. Applications were received from six companies presenting six different tests. In order to ensure that useful tests would be widely available, applicants were also requested to give assurances that they were prepared to make their tests available on a non discriminatory basis following the evaluation. A panel of external scientists assessed all applications based on the pre-defined criteria, covering e.g. the scientific basis of the test, available experimental evidence, practicality of the sampling and testing procedures and stage of development of the test.
Following this assessment 1 test was selected for the evaluation exercise. This joint application was presented by two companies: Scil Diagnostics GmbH, Martinsried, Germany and DiaSpec GmbH, Freiburg, Germany for the "AquaSpec BSE" rapid ante mortem test. Evaluation was based on the EFSA Scientific Report on the Design of a Field Trial Protocol for the evaluation of BSE Tests for Live Cattle adopted on 1 July 2004. On 10 October 2006, EFSA has received the report of the European Commission's Institute of Reference Materials and Measurements (IRMM) on the evaluation of DiaSpec's rapid ante mortem BSE test (IRMM, 2006).
Based on the overall assessment covering the application dossier and a phase I laboratory evaluation, the experts of EFSA´s Working Group on TSE Testing express their opinion on the evaluated ante mortem BSE test. As the submitted AquaSpec BSE rapid ante mortem BSE Test could not succeed the laboratory trial, the overall assessment is negative.
Therefore, the experts of the EFSA WG on TSE Testing concluded that the AquaSpec BSE ante mortem rapid BSE Test did not meet the predefined criteria and therefore do not recommend the AquaSpec BSE rapid ante mortem test (Scil Diagnostics GmbH, Martinsried, Germany and DiaSpec GmbH, Freiburg, Germany) for approval by the European Commission.
____________________________
1 For citation purposes: Scientific Report of the European Food Safety Authority on Transmissible Spongiform Encephalopathy (TSE) on a request from the European Commission on the evaluation of a rapid ante mortem BSE test, The EFSA Journal (2006) 95, 1-14
Publication date: 19/12/2006
Last updated: 19/12/2006
Summary
http://www.efsa.europa.eu/EFSA/Scientific_Document/biohaz_sr_ej95_live_animal_bse_test_summary_en.pdf
Document
http://www.efsa.europa.eu/EFSA/Scientific_Document/biohaz_sr_ej95_live_animal_bse_test_en.pdf
USDA CERTIFIED BSE TESTING BLUNDERS
http://madcowtesting.blogspot.com/
TSS
bse-tester said:The idiot TimH wrote:
Subjected to ANOTHER test???? Who pays for that one Ron??? Then why even bother with your's ????
You really should try selling used cars,life insurance or home barber kits.
It is part of the same test you ignorant pathetic little moron. All tests, whether post or ante-mortem typically require a follow-up test for confirmatory purposes. But that concept like most other simple things, seem to be too much for you to grasp.
You have gone way too far with your personal attacks on me and frankly, I am sick and tired of havng to tolerate them any further. :roll: :roll:
You have gone way too far with your personal attacks on me and frankly, I am sick and tired of havng to tolerate them any further.
Either get used to it or DO something about it, Bottom Feeder.
Would you like directions to my house???
What is the point of having a pre-mortem BSE test if you need another post-mortem test to confirm the results????????
bse-tester said:bsetester wrote:
You have gone way too far with your personal attacks on me and frankly, I am sick and tired of havng to tolerate them any further.
TimH wrote as his incredible reply to me:
Either get used to it or DO something about it, Bottom Feeder.
Would you like directions to my house???
What is the point of having a pre-mortem BSE test if you need another post-mortem test to confirm the results????????
So, to answer your question which I wonder if you will actually grasp or even try to grasp:
First, you take the initial test to see if there is any evidence of infection. Second, you take a another sample, test it, confirm your first findings, then you store that sample and the results for a period that is equal to the average time it takes for the product (meat) to make it to the consumers kitchen and then be consumed. With me so far Timmy?? :roll: :roll:
This is done to provide a complete and traceable inventory and identification protocol of the actual animal from which that sample was taken. It is called "following the rules of protocol" that are commonly practiced in most laboratories around the world that deal with extremely contagious and dangerous level 3 or 4 type diseases. We are proposing that this protocol is enhanced to include "maintaining a traceable chain of custody from producer to consumer"
Now Timmy, you can read that or have someone else read it to you slowly and absorb it and deal with it as you please. I am finished with you from here on and will not respond to your ignorance or insults any more.
Timh, now you have shown all of us your true colors. You do not give a rat's arse about having any decent debate on this board and you care only to undermine those who chose to share information, much of which you do not understand obviously, and then you spew your insults, mainly directed at or to me. I personally am finished with you and my only regret is that you who cannot see anything positive in life and will always only embrace the negatives which, I see is your only concern.
I am saddened by the fact that you take this position with me because I have done nothing to you to bring this about. Certainly, I have responded to your insults and your rhetoric, but this all began with you and your consumate ignorance. So I shall leave you to your stupidity and your insulting manner and have nothing further to do with you.
Even though you display an incredible propencity towards being relentlessly ignorant and insulting towards me, I will still wish you and yours a very Merry Christmas and hopefully, a very good New Year as I do to all on this board.
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bsetester wrote:
Quote:
You have gone way too far with your personal attacks on me and frankly, I am sick and tired of havng to tolerate them any further.
TimH wrote as his incredible reply to me:
Quote:
Either get used to it or DO something about it, Bottom Feeder.
Would you like directions to my house???
What is the point of having a pre-mortem BSE test if you need another post-mortem test to confirm the results????????
So, to answer your question which I wonder if you will actually grasp or even try to grasp:
First, you take the initial test to see if there is any evidence of infection. Second, you take a another sample, test it, confirm your first findings, then you store that sample and the results for a period that is equal to the average time it takes for the product (meat) to make it to the consumers kitchen and then be consumed. With me so far Timmy??
This is done to provide a complete and traceable inventory and identification protocol of the actual animal from which that sample was taken. It is called "following the rules of protocol" that are commonly practiced in most laboratories around the world that deal with extremely contagious and dangerous level 3 or 4 type diseases. We are proposing that this protocol is enhanced to include "maintaining a traceable chain of custody from producer to consumer"
Now Timmy, you can read that or have someone else read it to you slowly and absorb it and deal with it as you please. I am finished with you from here on and will not respond to your ignorance or insults any more.
Timh, now you have shown all of us your true colors. You do not give a rat's arse about having any decent debate on this board and you care only to undermine those who chose to share information, much of which you do not understand obviously, and then you spew your insults, mainly directed at or to me. I personally am finished with you and my only regret is that you who cannot see anything positive in life and will always only embrace the negatives which, I see is your only concern.
I am saddened by the fact that you take this position with me because I have done nothing to you to bring this about. Certainly, I have responded to your insults and your rhetoric, but this all began with you and your consumate ignorance. So I shall leave you to your stupidity and your insulting manner and have nothing further to do with you.
Even though you display an incredible propencity towards being relentlessly ignorant and insulting towards me, I will still wish you and yours a very Merry Christmas and hopefully, a very good New Year as I do to all on this board.
Sandhusker said:Amen. Having a test that would let us know the true extent of the disease would be the best weapon we could have to eradicate BSE, which should be our goal. Should Ron get a few dollars in his pocket, or even filthy rich, it would still be money well spent for all of us.
Timmy may see the light once he conquors puberty and his hormones settle down.