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.
References in periodicals archive ?
The colonies were slightly haemolytic with a strong positive oxidase reaction.
meningitidis was by its characteristic Gram stain morphology, oxidase reaction and rapid latex agglutination (Wellcogen N.
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.
In other meters, however, such as LifeScan's SureStepPro, that use a glucose oxidase reaction, sodium fluoride inhibits the reaction and cannot be used.
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.
This species' failure to grow on MacConkey agar, positive oxidase reaction, and typical antimicrobial susceptibility profile (see below) in respiratory samples of CF patients should arouse suspicion.
To do this, mitochondria perform a series of electron transfers known collectively as the cytochrome oxidase reaction.
The organism's identity was confirmed with biochemical tests (positive oxidase reaction, simmons citrate) and microscopic morphologic findings.