Chemical Composition and Antimicrobial Activity of the Essential Oils of Two Aromatic Plants Cultivated in Morocco (Cinnamomum cassia and Origanum compactum)

Table 6

Evaluation, by the disc method, of the effects of essential oils, active products, and antibiotics on the inhibition diameter (mm).

Bacterial; strains	Products used	EO of O. compactum	EO of C. cassia	Carvacrol	Cinnamaldehyde	Oxytetracycline	Amoxicillin	Mean
S. gallinarum	Oxytetracycline	22	29	25	26	—	—	22.1 A
	Amoxicillin	16	29	19.5	25	—	—
	Without antibiotic (nothing)	18	28	21	23	—	—
	Antibiotic alone	—	—	—	—	19	9
S. enteritidis	Oxytetracycline	14	17	16	17	—	—	14.2 B
	Amoxicillin	10	16.5	12	15	—	—
	Without antibiotic (nothing)	11	16	13	14	—	—
	Antibiotic alone	—	—	—	—	18	9
Mean	Oxytetracycline	18	23	20.5	21.5	—	—	18.1
	Amoxicillin	13	22.8	15.8	20	—	—
	Without antibiotic (nothing)	14.5	22	17	18.5	—	—
	Antibiotic alone	—	—	—	—	18.5	9

: presence of a synergistic interaction; : presence of a good synergistic interaction; (—): no test.