McDonald’s share price on Tuesday plummeted after the fast food giant was linked to an E. coli outbreak in several US states. The US Centers for Disease Control and Prevention (CDC) said that one elderly person has died in Colorado and 10 have been treated in hospitals in connection with the outbreak, with illnesses starting on September 27. A total of 49 cases have been reported across 10 states, with the highest numbers in Colorado and Nebraska. The CDC said the number of cases was likely much higher than the number reported. E. coli are bacteria and most are harmless and party of a healthy …