Line graph demonstrates the percentage of E. faecium resistant to high-level streptomycin, 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

The trend data from 1995 to 2010 was for relatively stable resistance despite year to year fluctuations (49.2% to 43.8%). In 2010 70.0% of non invasive isolates were high level streptomycin resistant compared to 31.8% of invasive isolates