Line graph demonstrates the percentage of E. faecalis resistant to high-level gentamicin, by survey year. Survey years include 1995, 1999, 2003, 2005, 2007, 2009 and 2010. The figure includes line graphs for invasive, non invasive, and all isolates.

High level gentamicin resistance in E. faecalis isolates increased significantly from 1993 to 2005 (9.7% to 35.2%) but has been relatively stable since then. In 2010 the percentage of invasive isolates resistant to high level gentamicin (37.1%) was similar to non invasive isolates (33.8%)