Voges-Proskauer reaction

Vo·ges-Pros·kau·er re·ac·tion

(fō'gis-prăs-kow'ĕr),
a chemical reaction used in testing for the production of acetyl methyl carbinol by various bacteria; potassium hydroxide is added to a 24-hour culture in a suitable medium and thoroughly mixed; the treated culture is exposed to air and is observed at intervals of 2, 12, and 24 hours; a positive reaction consists of the development of an eosin-like pink color, due to the production of acetylmethylcarbinol, which in the presence of alkali and oxygen is oxidized to diacetyl.

Proskauer,

Bernhard, German bacteriologist, 1851-1915.
Voges-Proskauer reaction - see under Voges

Voges,

Daniel Wilhelm Otto, German physician, 1867–.
Voges-Proskauer reaction - a chemical reaction used in testing for the production of acetyl methyl carbinol by various bacteria.
References in periodicals archive ?
The non mannitol fermenting gram positive coccal isolates which reacted slowly to Voges-Proskauer reaction and produced non pigmented colonies, double zone hemolysis on blood agar were suggestive of Staphylococcus pseudintermedius (Calvo et al.
2), Catalase negativity, positive nitrate reduction test, negative urea hydrolysis test, negative Voges-Proskauer reaction and by extended biochemical tests to determine different sugar fermentation (see Table).
Phenotypic characterization included the Voges-Proskauer reaction, polymyxin B (50 U) susceptibility, chick cell agglutination, and sheep erythrocyte hemolysis; all isolates were confirmed as El Tor biotype.