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Asunto:[difusioncav] Perros perciben el "Cancer"
Fecha:Domingo, 22 de Enero, 2006  02:26:33 (-0300)
Autor:Nelson Guizzo <nelson22 @.....com>


Les comento a modo de resumen por si alguien no pudo entenderlo... titula
 
"los perros, tan buenos como el radiodiagnóstico
o "tecnologías de pantalla"... no sé el término médico)
para la detección del cáncer"

Dice que los perros pueden ser hasta 99% (sólo 1% de error en cáncer de pulmón y 2% en cáncer mamario) precisos en la detección del cáncer, ya que pueden detectar las sustancias químicas asociados a esta enfermedad, incluso cantidades tan mínimas como 1 parte en un trillón.

Son perritos Labrador y Perro de Agua Portugués, sin entrenamiento previo, y que, con solo olfatear, han sido exitosos en la detección de esa enfermedad, aunque queda por probar si también reaccionaban a otras enfermedades en genera en esos pacientes. Igualmente, queda por hacer una investigación a gran escala.

*********** *********** *********** *********** ***********

Dogs as good as screening for cancer detection

    * 11:24 09 January 2006
    * NewScientist.com news service
    * Kurt Kleiner

Dogs do as well as state-of-the-art screening tests at sniffing out people
with lung or breast cancer. The research raises the possibility that trained
dogs could detect cancers even earlier and might some day supplement or even
replace mammograms and CT scans in the laboratory.

Two previous studies have shown that dogs seem to be able to sniff out
melanomas and bladder cancer. The idea is not outrageous. Cancer patients
have been shown to have traces of chemicals - like alkanes and benzene
derivatives - in their breath, and other studies have shown dogs can
detect
chemicals in concentrations as small as a few parts per trillion.

So researchers at the Pine Street Foundation in San Anselmo, California, US,
selected three Labrador retrievers and two Portuguese water dogs with no
previous training, and over several weeks trained them using breath samples
that had been exhaled into tubes by cancer patients.

To test how well the dogs had learned, they used a new batch of samples and
had the dogs attempt to distinguish among 55 lung cancer patients, 31 breast
cancer patients and 83 healthy controls. The patients had all had their
cancers confirmed by biopsy. The tests were double-blind, so neither the dog
handlers nor the experimenters knew which tubes were which.
General symptom

The dogs correctly detected 99% of the lung cancer samples, and made a
mistake
with only 1% of the healthy controls. With breast cancer, they correctly
detected 88% of the positive samples, and made a mistake on only 2% of the
controls.

The work is convincing, says James C Walker, director of the Florida State
University Sensory Research Institute in Tallahassee, US. In 2004 Walker and
colleagues showed that dogs could sniff out melanomas. He says that the next
step is to see if dogs are really detecting cancer, or if they might be
sensing a more general disease symptom, such as one that comes from
inflammation.

Walker says he would like, eventually, to see a long, large-scale trial
designed to test whether dogs can detect cancer even earlier than standard
screening tests.

Journal reference: Integrative Cancer Therapies (vol 5, p 1)

--
*
*
*
*****************************************************************
* Remite: Nelson Guizzo *  Celular: 00 598 94909970
* Representante de: Contacto Agua Vital Internacional
* nelson22@adinet.com.uy - nelson22@gmail.com
* Website: http://www.aguavital.tk
* http://es.geocities.com/contactoaguavital/index.htm
* Msn: ng0022@hotmail.com - ng000022@yahoo.com.ar
* Difusión New Age Blog: http://difusioncav.zoomblog.com
* Grupo: http://www.egrupos.net/grupo/difusioncav
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