CHICAGO — Chicago Bears great Steve McMichael has MRSA — a type of staph infection that resists most antibiotics — and is undergoing a blood transfusion at a suburban hospital, his family said Saturday in a statement. The latest news on McMichael’s condition comes after he was admitted to the intensive care unit Thursday night with a urinary tract infection. The family expressed hope in a statement Friday that McMichael was expected to be released from the hospital in the days ahead, but after the latest development, they again asked for the public’s prayers “to get Steve through this difficul…