Pet Scan

After two months of training, 2-year-old Beagle, Cliff, correctly identified all 50 positive and 47 out of 50 negative samples. “The benefit of this detector is that you don’t need a sample, or a doctor to make a diagnosis. It merely involves taking a dog for a walk around the ward.”
C-difficile is one of the most common causes of infectious diarrhea and has become a problem, in part, because of the over-use of antibiotics.

PopSci: Adorable Beagle Diagnoses Deadly Infections By Sniffing You