A dog that can detect the presence or absence of cancer with 100% accuracy
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Past studies have shown that ' dogs can scent human lung cancer with an accuracy of more than 70% ', but experiments that smell dogs smell of blood have a cancer accuracy of 100%. Examples of successful sniffing have been reported.
Accuracy of Canine Scent Detection of Non–Small Cell Lung Cancer in Blood Serum | The Journal of the American Osteopathic Association
https://jaoa.org/article.aspx?articleid=2736410
Study shows dogs can accurately sniff out cancer in blood: Canine cancer detection could lead to new noninvasive, inexpensive ways to detect cancer-ScienceDaily
https://www.sciencedaily.com/releases/2019/04/190408114304.htm
These 3 Beagles Could Sniff Out Cancer in Blood With 97% Accuracy, Study Shows
https://www.theepochtimes.com/these-3-beagles-could-sniff-out-cancer-in-blood-with-97-accuracy-study-shows_3057429.html
Dogs are said to be 10,000 times more olfactory than humans, and beagle dogs with 225 million olfactory receptors are one of the breeds with particularly good olfaction. So a team of BioScentDx chief scientists, Heather Junkera , who provides testing services that take advantage of the sense of smell of dogs, trained four 2-year-old Beagle dogs to identify cancer from blood samples .
Training uses blood samples from patients with non-small cell lung cancer that are highly effective in early detection and treatment. When a sample is put in a metal container with a hole and smelled, and it can be judged correctly whether it is cancer or not, training is given by a method called `` clicker training '' that gives a snack with a `` click '' sound. did.
State during training.
However, one of the four beagle dogs dropped out of training because they lacked the “dedication to snacks” necessary for training. Eventually, three dogs completed eight weeks of training. After that, we conducted an experiment in which three dogs sniffed 10 blood samples from cancer patients and 40 samples from the control group, for a total of 50 blood samples. As a result, the three were able to identify the blood of cancer patients with an average accuracy of 96.7%. Above all, the accuracy of the individual with the best results is 100%. He was able to sniff out 50 samples without making a mistake.
The following bar graph shows the test results of the trained Beagle Nos. 1 to 3, with the purple color indicating “results of identifying a cancer patient sample as cancer” and the orange color indicating “a non-cancer patient sample. The results identified as non-cancer patients. If you look at the results of the second issue in the middle, you can see that both were 100%, not only did you miss a cancer patient, but you did not misdiagnose a non-cancer sample.
Junqueira said, 'If we can detect cancer early with high accuracy, we can save the lives of countless potential cancer patients,' and the results of this study will screen for new cancers. He expressed his view that it would lead to the establishment of inspection methods. On the other hand, Junqueira admits that there are a small number of dogs and blood samples, and he says that more extensive research is needed for commercialization.
In the future, the research team will study whether it is possible to identify lung cancer patients from human breath and apply to cancers other than lung cancer such as breast cancer, and identify chemical substances that generate cancer-specific odors The company plans to use it to develop more accurate screening tests and treatment methods.
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