Table 1:
Susceptibility of
L. monocytogenes
ATCC 7644 to oleuropein (OLE) and peracetic acid (PAA), alone or in combination, in the disk diffusion method.
Solution
Diameter of inhibition zone (mm)
1
Classification
2
Control (sterilized water)
6.0 ± 0.00
Resistant
OLE (5.0 mg/mL)
6.0 ± 0.00
Resistant
PAA (2.0%, v/v)
8.7 ± 1.2
Intermediate
PAA (2.0%, v/v) + OLE (5.0 mg/mL)
14.0 ± 0.0
Sensitive
1
Results are reported as mean ± standard deviation of triplicate assays.
2
Resistant: inhibition zone (IZ) = 6 mm; Intermediate: IZ = 7 to 10 mm; Sensitive: IZ > 10 mm, according.