Theres good and bad news on the “superbug” front. In community hospitals in the Southeast, an easily spread bacterium appears to have overtaken the widely feared MRSA as the most common hospital-acquired infection. But a pilot project in Ohio found that pushing hard on simple things such as hand washing and thorough cleaning can lower rates of that bug significantly.Known as Clostridium difficile, or “C. diff,” the bacterium resides in the gut, is spread by contact and can cause painful intestinal infections and in some cases death. Its primarily seen in those over 65, and relapses occur in a fourth of patients, despite treatment.