Comparative Evaluation of the Inhibitory Effect of Some Essential Oils with Antibiotics against Pseudomonas aeruginosa

Table 1

Susceptibility pattern of Pseudomonas aeruginosa to tested antibiotics.

Antibiotic	Disc content	Inhibition zone diameter (mm)	Zone diameter breakpoints according to CLSI* guidelines			Sensitivity pattern
			S	I	R
Piperacillin	100 μg	15	≥18	—	≤17	Resistant
Cefepime	30 μg	30	≥18	15–17	≤14	Susceptible
Meropenem	10 μg	34	≥16	14-15	≤13	Susceptible
Gentamicin	10 µg	29	≥15	13-14	≤12	Susceptible
Norfloxacin	10 µg	31	≥17	13–16	≤12	Susceptible

*CLSI: Clinical and Laboratory Standards Institute.