TUCSON, Arizona, Jan. 22 -- The University of Arizona posted the following news release: * * * 'Trojan horse' may deliver toxic dose of copper to bacterial colonies, including drug-resistant MRSA infections * A research team at the University of Arizona College of Medicine - Tucson is developing a drug that works in combination with copper to kill bacteria, including those that cause MRSA, a type of staph infection that is resistant to usual treatments. They published their results last mont  more