GM bacteria Biosensors to detect Cancer

According to two new studies which explained how genetically modified (GM) bacteria can detect cancer tumors and diabetes in mice. The GM bacteria "biosensors" could also be used as remote diagnostic tools for medical patients.  

The first study at the Massachusetts Institute of Technology (MIT) and University of California-San Diego was published in the journal Science Translational Medicine. Scientists used modified E.coli bacteria as an organic sensor to detect cancer tumors in a mouse body.Normally E.coli can move through gut walls and live in liver tumors. However, the GM bacteria manufactured an enzyme that changed the mouse urine's color, as a type of early warning system for cancer detection. Source