Method for detection of contaminants

C - Chemistry – Metallurgy – 12 – Q

Patent

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Details

C12Q 1/66 (2006.01) C12M 1/34 (2006.01) C12M 1/40 (2006.01) G01N 21/01 (2006.01) G01N 21/76 (2006.01) G01N 33/52 (2006.01) G01N 33/543 (2006.01) G01N 33/569 (2006.01) G01N 1/02 (2006.01)

Patent

CA 2249370

A method and device for determining the presence and concentration of total microbial contamination or the presence and concentration of a specific microbial species is described. The method consists of a means of collection of the microbes from an air, liquid, surface or other sample and suspending them in fluid phase (3). An aliquot of the fluid phase (3) is introduced into a disposable test device which allows filtration of the sample to concentrate the microbes and to remove extraneous substances including somatic cells, and concentration of the microbes. The total concentration of microbes is determined by adding a somatic and bacterial releasing reagent to a disposable test device (25) which comprises a membrane (26) containing the luminescent reagents luciferin and luciferase, and introducing the disposable test device (25) into a luminometer that can read the luminescence from the underside.

L'invention concerne un procédé et un dispositif permettant de déterminer la présence et la concentration d'éléments contaminants microbiens dans leur totalité ou la présence et la concentration d'une espèce microbienne spécifique. Ledit procédé consiste à collecter les microbes contenus dans un échantillon d'air, de liquide, de surface ou autre, et à mettre en suspension ces microbes dans une phase liquide (3). Une aliquote de la phase liquide (3) est introduite dans un dispositif d'essai jetable qui permet la filtration de l'échantillon, filtration dont le but est de concentrer les microbes et d'enlever les substances étrangères, y compris les cellules somatiques, ainsi que la concentration des microbes. La concentration totale de microbes est déterminée par addition d'un réactif libérant les cellules somatiques et bactériennes dans un dispositif d'essai (25) jetable qui comprend une membrane (26) contenant les réactifs luminescents luciférine et luciférase, et par introduction du dispositif d'essai (25) jetable dans un luminomètre qui peut détecter la luminescence émanant de la face inférieure.

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