Using four trained sniffer dogs to analyze urine samples from patients who had bladder cancer, alongside healthy people, the researchers found that the dogs were able to detect the cancer with an accuracy level that ranged from 56 percent to 92 percent.
A dog has up to 300 million scent glands (a human has about 5 million), which makes a dog's sense of smell up to 100,000 times more sensitive.
"We believe all diseases have scent associated with the diseases, due to the changes occurring within the body, with different organs expressing different chemical compounds," Ralph Hendrix, executive director of Dogs4Diabetics, told Medical News Today. "These scents are evident in breath and sweat."
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