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At 03:52 AM 7/23/2011, Michael Balter wrote:
I posted this with trepidation, because I knew that Mitchel and Jim in their ignorance would see a connection between this and the HIV antibody test. There is no connection.

Michael, explain why there is "no connection".

For decades, tests for HIV disease have depended on ascertaining whether antibodies are present. Critics have said that "HIV disease" is really many separate diseases, but that testing for those so-called opportunistic infections -- and especially toxicological analysis -- is not performed once antibodies to HIV are found in a person's blood.

Furthermore, the discovery of antibodies in a person's body indicates that at some time in their life a person was exposed to a pathogen and the immune system responded as it should. A positive finding of antibodies does not indicate sickness; it indicates "exposure" at some point in the person's history.

It seems to me that this statement by WHO is applicable to all diagnoses based on discovery of antibodies in a person's blood. Please explain, narrowly, what is wrong with that logic.

Mitchel


MB

On Sat, Jul 23, 2011 at 9:48 AM, Mitchel Cohen < [log in to unmask]> wrote:
At 03:33 AM 7/23/2011, Michael Balter wrote:
http://news.sciencemag.org/scienceinsider/2011/07/a-common-tb-test-is-inaccurate-w.html

These blood tests are inaccurate because they rely on antibody detection of antigens produced byMycobacterium tuberculosis (MTB), the organism that causes tuberculosis. Antibody response is a poor indicator, however, because the various types of mycobacteria share antigens, and other infections raise similar antibody responses. As a result, blood tests may be detecting the presence of other mycobacterial infections; they may also produce false positives when antibody levels remain elevated after cases of TB have been treated.

Finally!

This has been one of the critiques concerning HIV diagnoses as well.

Mitchel





http://www.MitchelCohen.com


Ring the bells that still can ring,  Forget your perfect offering.
There is a crack, a crack in everything, That's how the light gets in. 
~ Leonard Cohen









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******************************************
Michael Balter
Contributing Correspondent, Science
Adjunct Professor of Journalism,
New York University

Email:  [log in to unmask]
Web:    michaelbalter.com
NYU:    journalism.nyu.edu/faculty/michael-balter/
******************************************

“Faced with the choice between changing one’s mind and proving that there is no need to do so, almost everyone gets busy on the proof."
                                                  --John Kenneth Galbraith





http://www.MitchelCohen.com


Ring the bells that still can ring,  Forget your perfect offering.
There is a crack, a crack in everything, That's how the light gets in. 
~ Leonard Cohen