GC-MS Characterization of Antibacterial, Antioxidant, and Antitrypanosomal Activity of Syzygium aromaticum Essential Oil and Eugenol

Table 2

Inhibitory zone diameters and minimum inhibitory concentration of Syzygium aromaticum essential oil and eugenol on different bacterial cultures after 24 hours of treatment.

Antimicrobial assay	Compounds	Bacteria strain
		E. coli	S. aureus	P. aeruginosa
Inhibition zones (mm)	S. aromaticum	22.67 ± 0.577^a	25.00 ± 1.000^a	14.00 ± 1.000^a
	Eugenol	20.33 ± 0.577^a	22.33 ± 0.577^b	11.00 ± 1.000^b
	Gentamycin	13.33 ± 1.155^b	20.33 ± 0.577^b	16.67 ± 0.577^c
	Ampicillin	13.67 ± 0.577^b	—	8.33 ± 1.155^d
MIC (μg/mL)	S. aromaticum	100.0 ± 0.00^a	50.0 ± 0.00^a	200.0 ± 0.00^a
	Eugenol	100.0 ± 0.00^a	250.0 ± 0.00^b	200.0 ± 0.00^a
	Gentamycin	16.00 ± 0.00^b	8.00 ± 0.00^c	–
	Polymyxin B	—	—	16.00 ± 0.00^b

MIC: minimum inhibitory concentration. Data represent mean ± standard deviation of experiment carried out in triplicate. Different letters in the same column in each antimicrobial assay mean statistical difference between groups.