63% of surveyed infectious disease physicians treated a patient with at least one drug-resistant infection in 2011. 56% believed those infections to be on the rise.
Hersh, Adam L., Jason G. Newland, Susan E. Beekmann, Philip M. Polgreen, and David N. Gilbert. Unmet Medical Need in Infectious Diseases. Clin Infect Dis. 2012; 54(11): 1677-8. http://cid.oxfordjournals.org/content/54/11/1677.full