Process of directly detecting and identifying a microorganism in a biological sample diluted in an enrichment broth

Patent metadata

Field	Value
Publication number	US-10907190-B2
Application number	US-201113808485-A
Country	US
Kind code	B2
Filing date	Jul 7, 2011
Priority date	Jul 8, 2010
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

The present invention generally relates to the field of analysis for example biological analysis. More specifically, the present invention relates to a process of detecting at least one microorganism present in a sample placed in a closed container, said method comprising essentially the following steps:
a) Place said sample in contact in the container with at least one culture medium and a support capable of capturing the microorganism(s) to be detected, b) Close the container, c) Place the container under conditions capable of allowing the growth of the microorganism(s), d) Detect, inside said closed container, using detection means, the presence of the microorganism(s) fixed onto the capture support.

First claim

The invention claimed is:

1. A process of directly detecting at least one microorganism present in a food, biological or environmental sample placed in a closed enrichment container, said method comprising:
a) placing said food, biological or environmental sample directly in contact in the enrichment container with at least one liquid culture medium and a capture support capable of capturing the microorganism(s) to be detected,
b) closing the container,
c) placing the container under conditions capable of allowing the growth of the microorganism(s),
d) transferring all or part of a mixture comprised of said sample, the culture medium, and the support capable of capturing the microorganism(s) to be detected, from the enrichment container to at least one second container that is inside the enrichment container,
e) detecting, inside said enrichment container, using detection means, the presence of the microorganism(s) fixed onto the capture support.

2. The process according to claim 1 , wherein a revealing system capable of allowing the detection is placed in contact with said food, biological or environmental sample in the enrichment container during step a).

3. The process according to claim 1 , further comprising f) confirming the detection of the microorganism(s) detected.

4. The process according to claim 3 , wherein the confirming step f) is accomplished using a detection means which is identical or different from the detection means used for the detection step.

5. The detection process according to claim 1 , wherein the detection means is selected from the group comprising: electrical detection means, electrochemical detection means, optical detection means, acoustic detection means, thermal detection means, mechanical detection means, and magnetic detection means.

6. The detection process according to claim 5 , wherein the detection means is an optical detection means selected from the group consisting of a Raman spectrometer, an intrinsic fluorescence measurement means, a camera, and an optical fibre.

7. The process according to claim 1 , wherein the support for capturing the microorganism(s) also constitutes the detection means.

8. The detection process according to claim 1 , wherein at least one specific or non-specific binding partner of the microorganism(s) is fixed onto the capture support.

9. The detection process according to claim 8 , wherein the specific binding partner is selected from the group comprising: antibodies, Fab fragments, Fab′ fragments, recombinant or non-recombinant phage proteins, and phages.

10. The process according to claim 1 , wherein the detection of the microorganism(s) is performed in real-time.

11. The detection process according to claim 1 , wherein the detection of the microorganism(s) is performed after the growth step of said microorganism(s).

12. The detection process according to claim 1 , wherein the enrichment container is a homogenisation bag, a flask, a bottle or a pillbox.

13. The detection process according to claim 1 , wherein the detection means is connected to a data analysis system.

14. The detection process according to claim 1 , wherein the capture support or the detection means is connected to a data analysis device via a wired connection or a wireless connection.

15. The detection process according to claim 1 , wherein the detection means is selected from the group comprising: electrical detection mean, electrochemical detection means, acoustic detection means, thermal detection means, mechanical detection means, and magnetic detection means.

16. The detection process according to claim 1 , wherein the mixture further comprises a revealing system capable of allowing the detection.

Assignees

• Atrache Vincent
• Colin Bruno
• Lafay Aurelie
• Makrouf Bouchra
• Montes Pascal
• Mosticone David
• Raymond Jean Claude
• Sofia Thierry
• Vimont Antoine
• Biomerieux Sa

Inventors

• Atrache Vincent
• Colin Bruno
• Lafay Aurelie
• Makrouf Bouchra
• Montes Pascal
• Mosticone David
• Raymond Jean-Claude
• Sofia Thierry
• Vimont Antoine

Classifications

• C12M1/28

  being part of container · CPC title

• C12Q1/00

  Measuring or testing processes involving enzymes, nucleic acids or microorganisms (measuring or testing apparatus with condition measuring or sensing means, e.g. colony counters, C12M1/34); Compositions therefor; Processes of preparing such compositions · CPC title

• G01N33/569

  for microorganisms, e.g. protozoa, bacteria, viruses · CPC title

• C12Q1/04 Primary

  Determining presence or kind of microorganism; Use of selective media for testing antibiotics or bacteriocides; Compositions containing a chemical indicator therefor {(C12Q1/6897 takes precedence)} · CPC title

• G01N33/543

  with an insoluble carrier for immobilising immunochemicals · CPC title