Table 3: Zones of Inhibition (ZOI) of S. aureus on Viton bending rubber and endoscope insertion tubes after exposure to OPA for 10 minutes, followed by three 100 mL rinses and various drying times. The numbers reported are the mean ± standard deviation of three replicates in mm.

Drying timesOPA @ 25°C
Viton bending rubber
ZOI (mm)
Colonoscope insertion tube
ZOI (mm)

Not dried
1.0 hr
2.0 hrs
6.0 hrs
Overnight