ST. PAUL, Minn., Nov. 20 (UPI) -- Chinese researchers say a new kind of bacteria-packed pill can quickly detect gastrointestinal disease and has the potential to replace invasive colonoscopies in screening for ulcerative colitis and other gut maladies. The results of a mouse study published this week in an American Chemical Society journal are raising hopes that timely and accurate diagnosis of inflammatory bowel diseases such as colitis and Crohn's disease could be performed non-invasively in