Microbial Predominance and Antimicrobial Resistance in a Tertiary Hospital in Northwest China: A Six-Year Retrospective Study of Outpatients and Patients Visiting the Emergency Department

Table 5

Annual multidrug resistance percentage (R%) of bacterial isolates from the specimens between 2013 and 2018 from outpatients and patients visiting emergency department.

Bacterial species	Years	2013	2014	2015	2016	2017	2018	value	Trend
	Multidrug resistance targets	R%	R%	R%	R%	R%	R%
Escherichia coli	ESBLs	62.6	59.6	57.4	59.3	56.8	59.4	0.586	No change
	CRE	0.0	0.0	0.0	0.0	0.0	0.0	—	No change
Klebsiella pneumoniae	ESBLs	29.2	40.5	20.0	30.0	39.3	32.5	0.935	No change
	CRE	0.0	0.0	0.0	0.0	1.8	1.3	0.443	No change
Staphylococcus aureus	MRSA	53.8	27.6	25.9	25	25	19.2	0.191	No change
Staphylococcus epidermidis	MRSE	88.1	83.3	78.7	94.1	72.7	75.6	0.213	No change

ESBLs (extended spectrum β lactamases): ESBLs multidrug resistance was evaluated by using ceftriaxone. CRE (carbapenem-resistant enterobacteriaceae): CRE multidrug resistance was evaluated by using imipenem and meropenem. MRSA (methicillin-resistant S. aureus): MRSA multidrug resistance was evaluated by using oxacillin. MRSE (methicillin-resistant S. epidermidis): MRSE multidrug resistance was evaluated by using oxacillin.