Antibiotic policies to control hospital-acquired infection.

Antibiotic use is widely accepted as being responsible for the selection and maintenance of antibiotic resistance. It is less obvious, however, that it is also responsible for increasing transmissibility and pathogenicity of many multiresistant bacteria and may actually be increasing the number of hospital-acquired infections (HAIs). Antibiotic stewardship should be given much more emphasis in the fight against HAI.