Diagnostic device > Diagnostic discs
DIAGNOSTIC DISCS 50 discs Code: DD 505
for rapid detection of the oxidase activity
Purpose and usage:
OXIDASE diagnostic discs are designed for the rapid presumptive detection of cytochrome oxidase. The test differentiates e.g. pseudomonads, aeromonads etc. from gram negative enteric rods of the family Enterobacteriaceae.
The principle is the detection of the cytochrome oxidase by the color reaction of ethyloxethylparaphenylenediamine with alpha-naphtol during which indophenol blue develops.
Put the tested culture on the surface of the disc in shape of a line. Read the color reaction during 0.5 - 1 min.
If the reaction is positive (Oxidase +) the inocula- ted line on the disc turns into deep blue to black. If the reaction is negative (Oxidase -) the inoculated line will stay colorless.
1. OXIDASE discs are designed for laboratory use only.
2. Discs should be stored in a dark place at +4oC and should not be used beyond the expiration date shown on the packing.