Table 5.

Minimal inhibitory concentration (MIC) of antibiotics in absence and presence ofCinnamomum zeylanicumextract (μg/mL)

Bacterial strains	Antibiotics and MIC in absence and presence ofCinnamomum zeylanicumextract
		Ampicillin			Cefepime			Chloramphenicol			Ciprofloxacin			Cloxacillin
		Alone	MIC/2.5	MIC/5	Alone	MIC/2	MIC/5	Alone	MIC/2.5	MIC/5	Alone	MIC/2.5	MIC/5	Alone	MIC/2.5	MIC/5
AG100Atet	-	-	-	-	-	-	256	16 (16) S	32 (8) S	256	64 (4) S	128 (2) S	-	-	-
AG102	-	-	-	128	256 (0.5) I	256 (1) I	16	8 (2) S	16 (1) I	<2	<2	<2	-	256 (>1)S	-
CM64	-	256 (>1) S	-	-	256 (>1) S	-	nt	nt	nt	nt	nt	nt	-	-	-
KP63	-	32 (>8) S	-	256	32 (8) S	256 (1) I	-	32 (>8) S	256 (>1) S	64	128 (0.5) I	128(0.5)I	-	64 (>4)S	256 (>1)S
PA124	128	16 (8) S	64 (2) S	128	128 (1) I	128 (1) I	32	2 (16) S	8 (4) S	16	8 (2) S	16 (1) I	-	-	-
Bacterial strains	Erythromycin			Kanamycin			Norfloxacin			Streptomycin			Tetracycline
	Alone	MIC/2.5	MIC/5	Alone	MIC/2.5	MIC/5	Alone	MIC/2.5	MIC/5	Alone	MIC/2.5	MIC/5	Alone	MIC/2.5	MIC/5
AG100Atet	64	16 (4) S	32 (2) S	-	16 (>16)S	128 (>2)S	128	128 (1) I	128 (1) I	<2	<2	<2	2	2 (1) I	2 (1) I
AG102	32	16 (2) S	16 (2) S	<2	<2	<2	<2	<2	<2	-	256 (>1) S	256 (>1)S	<2	<2	<2
CM64	-	128 (>2)S	256 (>1)S	4	<2 (>2) S	<2 (>2) S	4	<2 (>2) S	4 (1) I	32	4 (8) S	8 (4) S	nt	nt	nt
KP63	16	1 (16) S	4 (4) S	32	32 (1) I	32 (1) I	-	128 (>2)S	256 (>1)S	<4	<4	<4	<2	<2	<2
PA124	128	16 (8) S	32 (4) S	128	8 (16) S	32 (4) S	64	32 (2) S	64 (1) I	nt	nt	nt	8	2 (4) S	2 (4) S

MIC/2.5: concentration of plant extract added equal to 204.8 μg/mL for AG100A_TET. KP63; and to 409.6 μg/ml for PA124. CM64. AG102.

MIC/5: concentration of plant extract added equal to 102. 4 μg/mL for AG100A_TET. KP63; and to 204.8 μg/ml for PA124. CM64. AG102.

(): Folds decreasing of MIC. S: synergy. I: indifference. nt: not tested; (−): MIC > 256 μg/ml.