Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.2.1.31 (beta-glucuronidase)
 7,680 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A medium containing the fluorogenic substrate 4-methylumbelliferyl-beta-D-glucuronide was developed for the isolation and identification of Escherichia coli within 7.5 h and was based on the detection of beta-glucuronidase. Optimum conditions for the rapid development of fluorescent colonies were determined. The optimum temperature was 41.5 degrees C. Development of fluorescence was delayed when carbohydrates were incorporated into the medium. Water samples were used to evaluate the medium by surface plating and membrane filtration. The frequency of false-negative results was 6.1% and false-positives were 3.7% for freshwater samples. The false-positive organisms were identified as Klebsiella spp. and Shigella sonnei. The potential applications of the medium are discussed.
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PMID:A rapid fluorogenic method for the detection of Escherichia coli by the production of beta-glucuronidase. 187 84

The use of 8-hydroxyquinoline-beta-D-glucuronide for the demonstration of beta-glucuronidase activity within the family Enterobacteriaceae has been investigated. The compound has been shown to be an effective substrate for the bacterial enzyme and the Michaelis constant for the association has been determined. A multipoint-inoculated method was employed to test 400 routine clinical isolates including those of urinary and faecal origin. When grown on an agar-based medium containing the substrate together with a ferric salt, glucuronidase-positive organisms were revealed by intense black pigmentation located only in the colony mass. The only organism yielding positive results by this method was Escherichia coli. The shigellae tested were negative by this procedure. Of the total biochemically profiled E. coli organisms 80% were specifically visualised by the method. This contrasts with 97% positively obtained by a fluorescence procedure involving use of 4-methylumbelliferone-beta-D-glucuronide but which also gives positive results with Shigella sonnei. A simple, cost-effective procedure involving use of both techniques for specific detection of E. coli is described.
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PMID:Detection of specific bacterial enzymes by high contrast metal chelate formation. Part II. Specific detection of Escherichia coli on multipoint-inoculated plates using 8-hydroxyquinoline-beta-D-glucuronide. 328 2

A commercial beta-glucuronidase (beta-GUR) test for the rapid and economical identification of Escherichia coli was evaluated. A total of 762 clinical strains and 228 environmental isolates were studied. More than 95% of the E. coli strains were found to be beta-GUR positive. Thirty-one clinical isolates of Shigella sonnei, 10 of Enterobacter cloacae, eight of Enterobacter aerogenes, nine of Citrobacter freundii and one of Salmonella enteritidis also gave positive results. The enzyme beta-GUR was also detected in two environmental strains of E. cloacae and one C. freundii. A comparative study between the beta-GUR test and the conventional identification system was carried out in 233 consecutive isolates of lactose positive enterobacteria. Agreement was observed in 223 cases and 190 E. coli strains were correctly identified using this test. Discrepancies were found in 10 cases: nine E. coli were beta-GUR negative and one C. freundii was beta-GUR positive. Escherichia coli was the only species positive for both beta-GUR and indole tests. This procedure permits a rapid, easy, precise and inexpensive identification of E. coli. beta-GUR positive Enterobacter strains have not previously been described.
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PMID:Evaluation of a commercial beta-glucuronidase test for the rapid and economical identification of Escherichia coli. 354 65