From Big Medical Encyclopedia

FOGESA — PROSKAUERA REAKTION (O. Voges, is mute. bacteriologist, sort. in 1867; Century of Proskauer, is mute. bacteriologist, 1851 — 1915; synonym: reaction to acetylmethylcarbinol, atse-toinovy reaction) — the test used for differentiation of bacteria.

In 1898 Mr. Foges and Proskauer found out that in fluid medium with glucose after addition of 40% of solution caustic heat cultures of nek-ry representatives of group of colibacilli (see Colibacillus) are painted in pink color, and cultures of other bacteria of this group remain colourless. In the subsequent this phenomenon was found in representatives of many other families gram-negative and gram-put lny microorganisms. In 1906 Mr. Harden and Uolpol (A. Harden, G. S. Walpole) showed that pink coloring is explained by fermentation of glucose (see) with formation of acetylmethylcarbinol (methyl-acetyl carbinol), to-ry in the presence of caustic heat and oxygen of air is oxidized to the diacetyl reacting with decomposition products of arginine (group of guanidine) — derivative peptone. The complex painted in pink color results, chemical composition to-rogo is not known yet.

Introduction to reaction of the creatinine (see Creatine) increasing contents among guanine accelerates and does reaction

much more sensitively. Sensitivity of the test increases also at introduction to reaction of alpha-naphthol, to-ry add before introduction 40% of solution caustic heat. In the beef-extract environment there can be false positive reactions due to existence in beef tea of methyl-acetyl carbinol, the diacetyl and other substances promoting reaction. For carrying out F. — Items of river apply Clark's circle (see Clark Wednesday), edges can form at the same time a basis for the test with methyl red: after an incubation during 48 hours at t ° 37 ° in a test tube with Wednesday carry out reaction with methyl red (for definition of a kislotoobrazovaniye), then in the same test tube — reaction of Foge-sa — Proskauera. Nek-ry bacteria of Hafnia alvei, Enterobacter liquefaciens, Proteus mirabilis, Yersinia enterocolitica, Aeromonas hyd-rophila give positive F. — The item of river only after their additional incubation during 48 hours at f 22 °.

Bibliography: G. P guelder-rose. Optional methods of bacteriological researches at food toxicoinfections, in book: Methods of indication of bacteria and viruses in objects of the environment, under the editorship of A. P. Shitskova, page 76, M., 1982;

Methods of a sanitary and microbiological research of objects of the environment, under the editorship of G. I. Sidorenko, M., 1978; Cowan S. T. Steel K. J. Cowan and Steel’s manual for the identification of medical bacteria, Cambridge, 1974; V o-g e s O. u. Proskauer B. Beitrag zur Ernahrungsphysiologie und zur Diffe-rentialdiagnose der Bakterien der hamorrha-gischen Septicamie, Z. Hyg. Infekt. - Kr., Bd 28, S. 20, 1898.

G. P. Kalina.