Proportion of Escherichia coli blood culture isolates that produced extended-spectrum β-lactamase in intensive care units and emergency departments, 2006–2016
| Setting | Year; no. (%) of isolates | p value* | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | ||
| Intensive care unit | 1/9 (11.1) | 1/17 (5.9) | 1/10 (10.0) | 2/19 (10.5) | 2/26 (7.7) | 2/18 (11.1) | 5/25 (20.0) | 6/32 (18.8) | 7/28 (25.0) | 7/39 (17.9) | 8/31 (25.8) | 0.02 |
| Emergency department | 6/180 (3.3) | 4/172 (2.3) | 14/206 (6.8) | 13/201 (6.5) | 14/128 (10.9) | 28/264 (10.6) | 35/272 (12.9) | 44/287 (15.3) | 27/298 (9.1) | 31/300 (10.3) | 47/318 (14.8) | < 0.001 |
↵* For the trend observed between 2006 and 2016 (χ2 test for trend.)