. 2021 Aug 17;53(3):449–462. doi: 10.3947/ic.2021.0015

Table 2. Antimicrobial resistance levels of Enterococcus faecium and Staphylococcus aureus isolates.

A) Enterococcus faecium
		N	PEN		AMP		VAN		GEN^a		STR^a		TET		CIP		RIF
		N	%	P	%	P	%	P	%	P	%	P	%	P	%	P	%	P
M+S+I	P1	194	90	NS	90	NS	42	<0.05	74	NS	67	NS	56	NS	93	NS	88	<0.05
	P2	255	93	NS	91	NS	53	<0.05	74	NS	68	NS	63	NS	95	NS	78	<0.05
	O	449	91		90		48		74		67		60		94		82
M	P1	119	93	NS	92	NS	36	<0.05	80	NS	67	NS	60	NS	96	NS	86	NS
	P2	153	95	NS	93	NS	52	<0.05	76	NS	72	NS	65	NS	95	NS	79	NS
	O	272	94		92		45		78		70		62		95		82
S	P1	40	90	NS	90	NS	47	NS	72	NS	75	NS	47	NS	95	NS	95	<0.05
	P2	71	89	NS	88	NS	46	NS	71	NS	60	NS	59	NS	94	NS	77	<0.05
	O	111	89		89		46		71		66		55		94		84
I	P1	35	80	NS	80	NS	54	NS	54	NS	57	NS	49	NS	93	NS	86	NS
	P2	31	94	NS	90	NS	74	NS	71	NS	71	NS	58	NS	97	NS	74	NS
	O	66	86		85		64		62		64		53		95		80
P1	P_M+S/I			0.06		0.07		NS		<0.05		NS		NS		NS		NS
P2	P_M+S/I			NS		NS		NS		NS		NS		NS		NS		NS
O	P_M+S/I			NS		NS		<0.05		<0.05		NS		NS		NS		NS

^aHigh level resistance.

In the Table are only reported significant differences (P <0.05), as well as those P-values ≤0.09.

In addition, susceptibility to linezolid was tested in 39 E. faecium and 53 S. aureus isolates from Period 2 with all being susceptible.

All S. aureus isolates were susceptible to vancomycin. In addition, chloramphenicol was tested in S. aureus from Period 1 showing an overall resistance rate of 16% with a maximum among intensive care unit isolates of 21%.

M, medicine; S, surgery; I, intensive care unit; P1, Period 1 (2009 - 2010); P2, Period 2 (2012 - 2014); O, overall; PEN, penicillin; AMP, ampicillin; VAN, vancomycin; GEN, gentamicin; STR, streptomycin; TET, tetracycline; CIP, ciprofloxacin; RIF, rifampicin; NS, non significant; OXA, oxacillin; ERY, erythromycin; CLI, clindamycin; TMP/SMX, trimethoprim-sulfamethoxazole.