Abstract: The invention relates to a method for detecting and/or identifying Escherichia coli (E. coli) in a biological sample, that comprises inoculating the biological sample liable to contain E. coli on a detection medium that comprises tryptophan and a substrate for an enzyme A, expressed by the majority of E. coli, in order to obtain bacterial colonies; detecting the colonies expressing the activity of the enzyme A and identifying them as being E. coli; and detecting the colonies that do not express the activity of the enzyme A, carrying out an indole test, and identifying the colonies having a positive indole test as being E. coli.

Abstract: Enzymatic phenoxazinone substrates of formula (I): in reaction media containing the same are used for detecting, identifying and/or quantifying microorganisms expressing at least one peptidase activity.

Abstract: The present invention relates to a reaction medium for cholerae-group Vibrio (cholerae/vulnificus and mimicus) and Vibrio parahaemolyticus bacteria, comprising a substrate for detecting a ?-galactosidase enzymatic activity, a sugar, a coloured indicator. The invention also relates to the use of this medium for isolating and identifying cholerae-group Vibrio (cholerae/vulnificus and mimicus) and Vibrio parahaemolyticus. Finally, the invention relates to a method for identifying Vibrio cholerae and Vibrio parahaemolyticus bacteria, according to which beta-galactosidase activity is detected for identifying Vibrio cholerae and the acidification of a sugar is detected for revealing Vibrio parahaemolyticus.

Abstract: The invention relates to a method for detecting and/or identifying E. coli in a urine sample, that comprises: a) inoculating the urine sample liable to contain E. coli on a detection medium that comprises a first substrate selected from a beta-glucuronidase substrate, beta-galactosidase substrate and alpha-galactosidase substrate, and a substrate for a lactose acidification enzyme, beta-ribosidase, phosphatase, L-alanine aminopeptidase and L-leucine aminopeptidase, and a second substrate, different from said first substrate and selected from a beta-glucuronidase substrate, beta-galactosidase substrate and alpha-galactosidase substrate, and a substrate for a lactose acidification enzyme, beta-ribosidase, phosphatase, L-alanine aminopeptidase and L-leucine aminopeptidase, or obtaining bacterial colonies; b) identifying the colonies that react with the first substrate and/or the second substrate as being colonies of E. coli.

Abstract: The invention relates to a biochemical test for confirming the presence of L. monocytogenes, characterized in that it comprises at least one phosphatidylinositol phospholipase C (PI-PLC) substrate and at least one alpha-mannosidase substrate.

Abstract: The invention relates to a method for detecting and/or identifying Escherichia coli (E. coli) in a biological sample, that comprises inoculating the biological sample liable to contain E. coli on a detection medium that comprises tryptophan and a substrate for an enzyme A, expressed by the majority of E. coli, in order to obtain bacterial colonies; detecting the colonies expressing the activity of the enzyme A and identifying them as being E. coli; and detecting the colonies that do not express the activity of the enzyme A, carrying out an indole test, and identifying the colonies having a positive indole test as being E. coli.

Abstract: Novel enzymatic substrates of the general formula below: reaction media containing the same, and their use for detecting, identifying, and/or quantifying microorganisms expressing at least one peptidase activity.

Abstract: Novel enzymatic substrates of the general formula below: reaction media containing the same and their use for detecting and/or identifying and/or quantifying microorganisms expressing at least one peptidase activity.

Abstract: The present invention relates to a reaction medium for cholerae-group Vibrio (cholerae/vulnificus and mimicus) and Vibrio parahaemolyticus bacteria, comprising a substrate for detecting a ?-galactosidase enzymatic activity, a sugar, a coloured indicator. The invention also relates to the use of this medium for isolating and identifying cholerae-group Vibrio (cholerae/vulnificus and mimicus) and Vibrio parahaemolyticus. Finally, the invention relates to a method for identifying Vibrio cholerae and Vibrio parahaemolyticus bacteria, according to which beta-galactosidase activity is detected for identifying Vibrio cholerae and the acidification of a sugar is detected for revealing Vibrio parahaemolyticus.

Abstract: The invention concerns novel enzymatic substrates of the general formula below: wherein: R1, R2, R3, R4, R5, R6, A and X are as defined in claim 1, reaction media containing same and their use for detecting and/or identifying and/or quantifying microorganisms expressing at least one peptidase activity.

Abstract: An enzyme substrate which includes a target portion and a marker portion, hydrolysis of the substrate leading to separation of the target portion from the marker portion, and the target portion being specific for the enzyme activity being assayed. A formulation containing at least one such substrate, and a method for detecting the bacterial species Pseudomonas aeruginosa is also disclosed. The target portion of the substrate is specific for ?-alanine aminopeptidase activity and the marker portion is a compound which reveals whether a hydrolysis reaction has taken place or not. The invention is particularly applicable in the field of diagnosis.

Abstract: A nitrocoumarin compound or one of its derivatives which are fluorescent in the reduced state, and the use of these compounds for detecting the presence or absence of at least one microorganism. The invention concerns the use of these compounds, methods for isolating and detecting microorganisms or a group of microorganisms in a sample likely to contain them, and various applications thereof. Also disclosed is a method for detecting nitroaryl reductase activity in a bacteria culture medium.

Abstract: This invention concerns an enzyme substrate consisting of a target part and a marker part, hydrolysis of the substrate leading to separation of the target part from the marker part, and said target part being specific for the enzyme activity being assayed. It also concerns a formulation containing at least one such substrate, and a method for detecting the bacterial species Pseudomonas aeruginosa.

Abstract: This invention concerns a compound for detecting the presence or absence of at least one microorganism. The invention also concerns the use of a compound in a detection and/or diagnostic test. The said invention further concerns a method for detecting nitroaryl reductase activity in a bacteria culture medium. Finally, the invention concerns the use of such a compound, methods for isolating and detecting microorganisms or a group of microorganisms in a sample likely to contain them, and various applications thereof.

Abstract: The invention concerns a chromogenous substrate for detecting the presence of at least one enzyme enzymatic activity. The invention also concerns a method for using such a substrate. The invention further concerns a method for identification based on such substrates and a device for implementing said identification method. The invention is characterized in that the substrate consists of at lease two molecules, a first molecule consisting of a non-chromogenous marker part associated with at least a specific target part for the enzyme and a second molecule consisting of a non-chromogenous part, and the non-chromogenous marker part, once it is released, reacts with the second molecule to form a chromogenous molecule. The invention is particularly applicable in bacteriology.

Abstract: This invention concerns a method for detecting the presence in a sample, contained in a sterile receptacle, of at least one microorganism (aerobic or anaerobic), the sample being in contact with a culture medium. The invention also concerns a support which can be used in such a method.

Abstract: This invention relates to adsorbing antimicrobial agents contained in a biological fluid by passing the fluid over and through a fibrous material that is free of binding agents and is formed of activated carbon fibers.

Abstract: Apparatus for physicochemical separation and filtering constituents of fluids having a flexible leak-tight or semipermeable casing which tightly envelopes a filter material and inlet and outlet pipes for passing a fluid through the casing in contact with the filter material. The casing is made in a flat profile that can be formed into various shapes such as spirals, ribbons or the like.

Abstract: The invention relates to a method of bacteriological analysis for the selective detection of Salmonella and a medium for its implementation.The method is based on the specific capacity of Salmonella to ferment glucuronic acid or one of its salts, and not to produce .beta.-galactosidase.The medium comprises a nutrient which is metabolized by the bacteria, a chromogenic or fluorigenic compound capable of being hydrolyzed by the enzyme .beta.-galactosidase, glucuronic acid or one of its salts and a pH indicator.

Abstract: A method for the detection of microorganisms brings a sample suspected of containing a microorganism into contact with an aqueous phase reaction medium containing a carbon source and a resorufin marker. The reaction medium is incubated with the sample suspected of containing a microorganism and the fluorescence of the marker during or after incubating is observed. An observed decrease in emitted light indicates the presence of a microorganism.