Medical detection dogs are capable of detecting diseases by sniffing a person directly or samples of urine or other specimens. Dogs can detect odour in one part per trillion, as their brain's olfactory cortex is (relative to total brain size) 40 times larger than humans. Dogs may have as many as 300 million odour receptors in their nose, while humans may have only 5 million. Each dog is trained specifically for the detection of single disease from the blood glucose level indicative to diabetes to cancer. To train a cancer dog requires 6 months. A Labrador Retriever called Daisy has detected 551 cancer patients with an accuracy of 93 percent and received the Blue Cross (for pets) Medal for her life-saving skills. COUNT 5
QSN1 What can trained dogs detect by sniffing a person or a sample of their urine? ANS1 diseases QSN2 How much larger is a dog brain olfactory cortex when compared to humans? ANS2 40 times larger QSN3 A dog can detect smells in one part per what? ANS3 trillion QSN4 How much larger is a dog's olfactory cortex than a person's? ANS4 40 times larger QSN5 How many cancer patients has Daisy detected? ANS5 551