oxidase reaction

ox·i·dase re·ac·tion

1. the formation of indol blue when a blood smear containing myeloid leukocytes is treated with a mixture of α-naphthol and p-dimethylaniline sulfate; the myeloid leukocytes contain an oxidase that catalyzes this reaction, and the lymphoid leukocytes do not;
2. in bacteriology, a reaction that depends on the presence of certain oxidases in some bacteria that catalyze the transport of electrons between electron donors in the bacteria and an oxidation reduction dye, such as tetramethyl-p-phenylenediamine; the dye is reduced to a blue or black color.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
The colonies isolated on chocolate agar plates were identified by colonial morphology, gram stain, and oxidase reaction. Colonies appeared smooth, round, uniform, grey/brown, and 1 mm in diameter.
Cytochrome C oxidase activity: Cytochrome C oxidase reaction is shown bluish brown to brownish black in the micrograph of MII oocytes (Figure 1).
Identification of Pseudomonas pyocyanea by the oxidase reaction. Nature.
Based on this information it is obviously very important to develop specific analytical methods for measuring this amino acid preferably in simple and reliable way [6-13].The hydrogen peroxide formed after L-glutamate oxidase reaction can be easily detected by several methods used glutamate oxidase such as biosensor and the chromogenic peroxidase reaction [4 14-19].
The colonies were slightly haemolytic with a strong positive oxidase reaction. Catalase testing was negative.
meningitidis was by its characteristic Gram stain morphology, oxidase reaction and rapid latex agglutination (Wellcogen N.
Purple colour production within 10 seconds indicates a positive oxidase reaction.
At the species level, the bacterium grew well at 37[degrees]C, unlike Chitinophaga arvensicola, and showed positive oxidase reaction and nitrate reduction, unlike Chitinophaga ginsengisegetis (2,5).
Positive results can be verified with the oxidase reaction. Staphylococcus: These vials contain the membrane filter and selective and differential growth medium above containing mannitol and a pH indicator (Phenol Red).
In other meters, however, such as LifeScan's SureStepPro, that use a glucose oxidase reaction, sodium fluoride inhibits the reaction and cannot be used.
AHH plays a crucial role in the biotransformation of polycyclic hydrocarbons, the phenolic product of the oxidase reaction being further metabolized by the cytochrome P450-dependent mixed-function oxidase system to highly reactive electrophiles.
The various test methods employed by self-monitoring glucose devices used by diabetics at home, point-of-care analyzers, and laboratory glucose assays, she pointed out, all use one of the following test methods: glucose hexokinase, glucose dehydrogenase pyrroloquinolinequinone (GDH-PQQ), glucose dehydrogenase nicotinamide adenine dinucleotide (GDH-NAD), and glucose oxidase reaction. She cautioned members of the audience to know what methodology their instrument uses for testing glucose.